Hessa/all_train_questions · Datasets at Hugging Face

Unnamed: 0 int64 0 15.2k	questionID stringlengths 9 10	lessonName stringclasses 629 values	beingAsked stringlengths 5 342	imageName stringlengths 12 40 ⌀	imagePath stringlengths 28 56 ⌀	questionType stringclasses 2 values	answerChoices stringlengths 17 554	correctAnswer stringclasses 7 values
12,500	NDQ_013112	friction	Why do ball bearings reduce friction in a wheel?	null	null	Multiple Choice	a. Ball bearings prevent the wheel from sliding on the road., b. Rolling friction is less than sliding friction., c. Ball bearings roll instead of slide., d. two of the above	d
12,501	NDQ_013113	friction	Why is it easier to slide a heavy box over a floor that it is to start it sliding in the first place?	null	null	Multiple Choice	a. The box is lighter when it is sliding., b. The box has less mass when it is moving., c. The box has no friction when it is stationary., d. The box has less friction when it is sliding.	d
12,502	NDQ_013114	friction	Which statement about rolling friction is false?	null	null	Multiple Choice	a. It would be hard to ride a bike without it., b. It occurs when ball bearings are used., c. It is stronger than sliding friction., d. It is weaker than static friction.	c
12,503	NDQ_013115	friction	Fluid friction is greater when the object moving through the fluid is	null	null	Multiple Choice	a. larger., b. smaller., c. faster., d. two of the above	d
12,504	NDQ_013117	friction	A skydiver uses a parachute to	null	null	Multiple Choice	a. increase air resistance., b. cushion the landing., c. slow the descent., d. two of the above	d
12,505	NDQ_013118	friction	Which type of friction occurs between a paddle and the water?	null	null	Multiple Choice	a. static friction, b. sliding friction, c. fluid friction, d. rolling friction	c
12,506	NDQ_013120	friction	Friction is never useful.	null	null	Multiple Choice	a. true, b. false	b
12,507	NDQ_013123	friction	Too much friction can cause parts to wear out.	null	null	Multiple Choice	a. true, b. false	a
12,508	NDQ_013125	friction	Friction can cause scrapes on the skin.	null	null	Multiple Choice	a. true, b. false	a
12,509	NDQ_013126	friction	Friction is a force that opposes motion.	null	null	Multiple Choice	a. true, b. false	a
12,510	NDQ_013127	friction	Some surfaces are so smooth that they have no friction.	null	null	Multiple Choice	a. true, b. false	b
12,511	NDQ_013128	friction	The force of friction between surfaces is always useful.	null	null	Multiple Choice	a. true, b. false	b
12,512	NDQ_013129	friction	You use friction when you strike and light a match.	null	null	Multiple Choice	a. true, b. false	a
12,513	NDQ_013130	friction	It takes more force to slide than to roll a heavy object.	null	null	Multiple Choice	a. true, b. false	a
12,514	NDQ_013131	friction	Sliding friction is greater when the sliding object is heavier.	null	null	Multiple Choice	a. true, b. false	a
12,515	NDQ_013132	friction	Friction works in the same direction as the force applied to move an object.	null	null	Multiple Choice	a. true, b. false	b
12,516	NDQ_013133	friction	Sliding friction is stronger than static friction.	null	null	Multiple Choice	a. true, b. false	b
12,517	NDQ_013134	friction	Rolling friction is weaker than sliding friction.	null	null	Multiple Choice	a. true, b. false	a
12,518	NDQ_013135	friction	When a dolly is stationary, there is rolling friction between the wheels and ground.	null	null	Multiple Choice	a. true, b. false	b
12,519	NDQ_013136	friction	Static friction prevents you from sliding out of your chair to the floor.	null	null	Multiple Choice	a. true, b. false	a
12,520	NDQ_013137	friction	The brakes on a bike create rolling friction.	null	null	Multiple Choice	a. true, b. false	b
12,521	NDQ_013138	friction	type of friction between ice skates and ice	null	null	Multiple Choice	a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction	e
12,522	NDQ_013139	friction	any substance that can flow and take the shape of its container	null	null	Multiple Choice	a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction	d
12,523	NDQ_013140	friction	force that opposes motion between any two surfaces	null	null	Multiple Choice	a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction	a
12,524	NDQ_013141	friction	type of friction between shoes and pavement	null	null	Multiple Choice	a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction	b
12,525	NDQ_013142	friction	type of friction between a parachute and air	null	null	Multiple Choice	a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction	c
12,526	NDQ_013143	friction	type of friction between roller skates and concrete	null	null	Multiple Choice	a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction	g
12,527	NDQ_013144	friction	type of friction between an object and a gas or liquid	null	null	Multiple Choice	a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction	f
12,528	NDQ_013153	gravity	The SI unit for weight is the	null	null	Multiple Choice	a. gram., b. kilogram., c. newton., d. pound.	c
12,529	NDQ_013155	gravity	Newtons law of universal gravitation states that the force of gravity	null	null	Multiple Choice	a. affects all objects in the universe., b. is stronger for objects with more mass., c. is stronger for objects that are closer together., d. all of the above	d
12,530	NDQ_013157	gravity	Gravity causes all objects to	null	null	Multiple Choice	a. attract one another., b. have projectile motion., c. accelerate when they fall toward Earth., d. two of the above	d
12,531	NDQ_013158	gravity	The only reason that a leaf falls to the ground more slowly than an acorn is that the leaf has	null	null	Multiple Choice	a. less mass., b. more air resistance., c. a weaker force of gravity., d. less acceleration due to gravity.	b
12,532	NDQ_013161	gravity	On Earth, a mass of 1 kilogram exerts a downward force due to gravity of about	null	null	Multiple Choice	a. 1 N., b. 5 N., c. 10 N., d. 15 N.	c
12,533	NDQ_013165	gravity	Satellites orbit Earth because of gravity.	null	null	Multiple Choice	a. true, b. false	a
12,534	NDQ_013168	gravity	An object has a greater mass on Earth than it does on the moon.	null	null	Multiple Choice	a. true, b. false	b
12,535	NDQ_013170	gravity	Molecules of gas are attracted toward one another by gravity.	null	null	Multiple Choice	a. true, b. false	a
12,536	NDQ_013171	gravity	All of the solar systems in the universe formed because of gravity.	null	null	Multiple Choice	a. true, b. false	a
12,537	NDQ_013172	gravity	The mass of an object affects its force of gravity.	null	null	Multiple Choice	a. true, b. false	a
12,538	NDQ_013173	gravity	Gravity acts only between objects that are close together or touching.	null	null	Multiple Choice	a. true, b. false	b
12,539	NDQ_013174	gravity	Objects that are closer together have a weaker force of gravity.	null	null	Multiple Choice	a. true, b. false	b
12,540	NDQ_013175	gravity	All objects have the same acceleration due to gravity.	null	null	Multiple Choice	a. true, b. false	a
12,541	NDQ_013176	gravity	Earth has stronger gravity than the moon.	null	null	Multiple Choice	a. true, b. false	a
12,542	NDQ_013177	gravity	The curved path of an arrow is called its orbit.	null	null	Multiple Choice	a. true, b. false	b
12,543	NDQ_013178	gravity	Weight is measured with a balance.	null	null	Multiple Choice	a. true, b. false	b
12,544	NDQ_013179	gravity	People have known about gravity for thousands of years.	null	null	Multiple Choice	a. true, b. false	a
12,545	NDQ_013180	gravity	The moon has both forward velocity and acceleration toward Earth.	null	null	Multiple Choice	a. true, b. false	a
12,546	NDQ_013181	gravity	Einsteins theory of gravity is better than Newtons law of gravity at predicting how all objects move.	null	null	Multiple Choice	a. true, b. false	a
12,547	NDQ_013182	gravity	Einstein defined gravity as a force of attraction between objects with mass.	null	null	Multiple Choice	a. true, b. false	b
12,548	NDQ_013183	gravity	SI unit for weight	null	null	Multiple Choice	a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton	g
12,549	NDQ_013184	gravity	motion of an object subject to horizontal force and the force of gravity	null	null	Multiple Choice	a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton	e
12,550	NDQ_013185	gravity	force of attraction between two masses	null	null	Multiple Choice	a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton	a
12,551	NDQ_013186	gravity	scientist who proposed that gravity is due to curves in space and time	null	null	Multiple Choice	a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton	f
12,552	NDQ_013187	gravity	measure of the force of gravity	null	null	Multiple Choice	a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton	d
12,553	NDQ_013188	gravity	path of one object around another, such as the moon around Earth	null	null	Multiple Choice	a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton	c
12,554	NDQ_013189	gravity	scientist who proposed the law of universal gravitation	null	null	Multiple Choice	a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton	b
12,555	NDQ_013190	gravity	Gravity always causes objects to	null	null	Multiple Choice	a. repel each other., b. circle each other., c. attract each other., d. two of the above	c
12,556	NDQ_013191	gravity	Unlike friction, gravity	null	null	Multiple Choice	a. is a force., b. acts over a distance., c. acts between objects that are not touching., d. two of the above	d
12,557	NDQ_013192	gravity	What does weight measure?	null	null	Multiple Choice	a. size, b. mass, c. force, d. volume	c
12,558	NDQ_013193	gravity	Jody has a mass of 50 kilograms. What is his weight on Earth?	null	null	Multiple Choice	a. 5N, b. 50 N, c. 500 N, d. 5000 N	c
12,559	NDQ_013194	gravity	There is gravity between you and	null	null	Multiple Choice	a. Earth., b. the moon., c. your desk., d. all of the above	d
12,560	NDQ_013195	gravity	The moon orbits Earth rather than the sun because	null	null	Multiple Choice	a. the suns gravity is weaker than Earths., b. the moon is smaller than Earth., c. Earth already orbits the sun., d. the moon is closer to Earth.	d
12,561	NDQ_013196	gravity	An object with greater mass	null	null	Multiple Choice	a. has greater acceleration when it falls., b. has a weaker force of gravity., c. is less affected by gravity., d. has greater weight.	d
12,562	NDQ_013197	elastic force	Which of the following items has the property of elasticity?	null	null	Multiple Choice	a. rubber band, b. paper clip, c. toothpick, d. iron nail	a
12,563	NDQ_013198	elastic force	force exerted on a material that is pulled apart	null	null	Multiple Choice	a. elastic force, b. stretching force, c. compressing force, d. elasticity, e. spring	b
12,564	NDQ_013199	elastic force	structure that returns to its original shape after being stretched or compressed	null	null	Multiple Choice	a. elastic force, b. stretching force, c. compressing force, d. elasticity, e. spring	e
12,565	NDQ_013200	elastic force	When does an elastic material exert elastic force?	null	null	Multiple Choice	a. before it is stretched, b. as it is stretched, c. when it is released, d. two of the above	d
12,566	NDQ_013201	elastic force	force exerted on a material that is pushed together	null	null	Multiple Choice	a. elastic force, b. stretching force, c. compressing force, d. elasticity, e. spring	c
12,567	NDQ_013202	elastic force	What happens when you pull on a bungee cord?	null	null	Multiple Choice	a. It stretches., b. It resists the change in shape., c. It exerts force in the opposite direction., d. all of the above	d
12,568	NDQ_013203	elastic force	When you jump on a trampoline, the surface of the trampoline	null	null	Multiple Choice	a. changes shape., b. exerts elastic force., c. pushes you up into the air., d. all of the above	d
12,569	NDQ_013204	elastic force	counter force exerted by an elastic material that is stretched or compressed	null	null	Multiple Choice	a. elastic force, b. stretching force, c. compressing force, d. elasticity, e. spring	a
12,570	NDQ_013205	elastic force	Elastic force causes an elastic material to	null	null	Multiple Choice	a. push back when pulled., b. return to its original shape., c. take the shape of its container., d. two of the above	d
12,571	NDQ_013206	elastic force	ability of a material to return to its original shape after being stretched or compressed	null	null	Multiple Choice	a. elastic force, b. stretching force, c. compressing force, d. elasticity, e. spring	d
12,572	NDQ_013208	elastic force	Something that is elastic springs back after being stretched.	null	null	Multiple Choice	a. true, b. false	a
12,573	NDQ_013210	elastic force	An elastic material resists a change in shape.	null	null	Multiple Choice	a. true, b. false	a
12,574	NDQ_013211	elastic force	Elastic force is not very useful.	null	null	Multiple Choice	a. true, b. false	b
12,575	NDQ_013214	elastic force	When you use a resistance band, resistance comes from elastic force.	null	null	Multiple Choice	a. true, b. false	a
12,576	NDQ_013216	elastic force	Glass is an example of an elastic material.	null	null	Multiple Choice	a. true, b. false	b
12,577	NDQ_013217	elastic force	Items that are elastic include	null	null	Multiple Choice	a. metal wires., b. concrete blocks., c. plastic spring toys., d. all of the above	c
12,578	NDQ_013218	elastic force	When you compress a spring, it resists the change in shape.	null	null	Multiple Choice	a. true, b. false	a
12,579	NDQ_013219	elastic force	A rubber band keeps a newspaper tightly rolled because it	null	null	Multiple Choice	a. can be tied tightly., b. exerts elastic force., c. is unbreakable., d. none of the above	b
12,580	NDQ_013220	elastic force	Paper is an example of an elastic material.	null	null	Multiple Choice	a. true, b. false	b
12,581	NDQ_013221	elastic force	When you compress a spring, it	null	null	Multiple Choice	a. resists the change in shape., b. exerts a force in the same direction., c. permanently changes to a new shape., d. two of the above	a
12,582	NDQ_013222	elastic force	As you stretch a bungee cord, its elastic force gets stronger.	null	null	Multiple Choice	a. true, b. false	a
12,583	NDQ_013223	elastic force	When you release a stretched bungee cord, it returns to its original shape because of gravity.	null	null	Multiple Choice	a. true, b. false	b
12,584	NDQ_013224	elastic force	Springs are used in	null	null	Multiple Choice	a. beds., b. cars., c. scales., d. all of the above	d
12,585	NDQ_013225	elastic force	Something that is elastic returns to its original shape after being compressed.	null	null	Multiple Choice	a. true, b. false	a
12,586	NDQ_013226	elastic force	What happens when the stretching force on an elastic material is released?	null	null	Multiple Choice	a. The material breaks., b. The material remains stretched out., c. The material starts to exert elastic force., d. The material snaps back to its original shape.	d
12,587	NDQ_013232	newtons first law	Newtons first law of motion is also called the law of	null	null	Multiple Choice	a. mass., b. inertia., c. velocity., d. unbalanced forces.	b
12,588	NDQ_013233	newtons first law	Newtons first law of motion states than an objects motion will not change unless	null	null	Multiple Choice	a. the net force acting on it is greater than zero., b. a force continues to be applied to the object., c. its inertia is stronger than the applied force., d. the object has no inertia.	a
12,589	NDQ_013234	newtons first law	Overcoming an objects inertia always requires a(n)	null	null	Multiple Choice	a. large mass., b. massive force., c. unbalanced force., d. two of the above	c
12,590	NDQ_013235	newtons first law	Once an applied force causes an object to start moving, the object keeps moving because	null	null	Multiple Choice	a. the force continues to be applied to it., b. no other force is acting on it., c. it has inertia., d. none of the above	c
12,591	NDQ_013236	newtons first law	It is more difficult to start a 50-kg box sliding across the floor than a 5-kg box because the 50-kg box has greater	null	null	Multiple Choice	a. size., b. inertia., c. volume., d. velocity.	b
12,592	NDQ_013237	newtons first law	If the net force acting on any object is zero, the object will	null	null	Multiple Choice	a. not move., b. change its motion., c. have zero velocity., d. none of the above	d
12,593	NDQ_013238	newtons first law	Once an object starts moving along a clear path, it would keep moving at the same velocity if it were not for	null	null	Multiple Choice	a. inertia., b. friction., c. an unbalanced force., d. two of the above	d
12,594	NDQ_013239	newtons first law	If you run into a curb on your bike, you might fly forward over the handlebars because of	null	null	Multiple Choice	a. air resistance., b. inertia., c. friction., d. gravity.	b
12,595	NDQ_013240	newtons first law	An objects velocity will not change unless it is acted on by a(n)	null	null	Multiple Choice	a. net force., b. strong force., c. unbalanced force., d. opposite but equal force.	c
12,596	NDQ_013241	newtons first law	Inertia causes a stationary object to	null	null	Multiple Choice	a. start moving., b. remain stationary., c. have an increase in velocity., d. change its speed or direction.	b
12,597	NDQ_013242	newtons first law	The direction of a moving object will not change if the net force acting on it is	null	null	Multiple Choice	a. greater than zero., b. less than zero., c. zero., d. two of the above	c
12,598	NDQ_013245	newtons first law	Inertia is the tendency of an object to resist motion.	null	null	Multiple Choice	a. true, b. false	b
12,599	NDQ_013247	newtons first law	Newtons first law of motion is also called the law of acceleration.	null	null	Multiple Choice	a. true, b. false	b

12,500

NDQ_013112

friction

Why do ball bearings reduce friction in a wheel?

null

Multiple Choice

a. Ball bearings prevent the wheel from sliding on the road., b. Rolling friction is less than sliding friction., c. Ball bearings roll instead of slide., d. two of the above

d

12,501

NDQ_013113

friction

Why is it easier to slide a heavy box over a floor that it is to start it sliding in the first place?

null

Multiple Choice

a. The box is lighter when it is sliding., b. The box has less mass when it is moving., c. The box has no friction when it is stationary., d. The box has less friction when it is sliding.

d

12,502

NDQ_013114

friction

Which statement about rolling friction is false?

null

Multiple Choice

a. It would be hard to ride a bike without it., b. It occurs when ball bearings are used., c. It is stronger than sliding friction., d. It is weaker than static friction.

c

12,503

NDQ_013115

friction

Fluid friction is greater when the object moving through the fluid is

null

Multiple Choice

a. larger., b. smaller., c. faster., d. two of the above

d

12,504

NDQ_013117

friction

A skydiver uses a parachute to

null

Multiple Choice

a. increase air resistance., b. cushion the landing., c. slow the descent., d. two of the above

d

12,505

NDQ_013118

friction

Which type of friction occurs between a paddle and the water?

null

Multiple Choice

a. static friction, b. sliding friction, c. fluid friction, d. rolling friction

c

12,506

NDQ_013120

friction

Friction is never useful.

null

Multiple Choice

a. true, b. false

b

12,507

NDQ_013123

friction

Too much friction can cause parts to wear out.

null

Multiple Choice

a. true, b. false

a

12,508

NDQ_013125

friction

Friction can cause scrapes on the skin.

null

Multiple Choice

a. true, b. false

a

12,509

NDQ_013126

friction

Friction is a force that opposes motion.

null

Multiple Choice

a. true, b. false

a

12,510

NDQ_013127

friction

Some surfaces are so smooth that they have no friction.

null

Multiple Choice

a. true, b. false

b

12,511

NDQ_013128

friction

The force of friction between surfaces is always useful.

null

Multiple Choice

a. true, b. false

b

12,512

NDQ_013129

friction

You use friction when you strike and light a match.

null

Multiple Choice

a. true, b. false

a

12,513

NDQ_013130

friction

It takes more force to slide than to roll a heavy object.

null

Multiple Choice

a. true, b. false

a

12,514

NDQ_013131

friction

Sliding friction is greater when the sliding object is heavier.

null

Multiple Choice

a. true, b. false

a

12,515

NDQ_013132

friction

Friction works in the same direction as the force applied to move an object.

null

Multiple Choice

a. true, b. false

b

12,516

NDQ_013133

friction

Sliding friction is stronger than static friction.

null

Multiple Choice

a. true, b. false

b

12,517

NDQ_013134

friction

Rolling friction is weaker than sliding friction.

null

Multiple Choice

a. true, b. false

a

12,518

NDQ_013135

friction

When a dolly is stationary, there is rolling friction between the wheels and ground.

null

Multiple Choice

a. true, b. false

b

12,519

NDQ_013136

friction

Static friction prevents you from sliding out of your chair to the floor.

null

Multiple Choice

a. true, b. false

a

12,520

NDQ_013137

friction

The brakes on a bike create rolling friction.

null

Multiple Choice

a. true, b. false

b

12,521

NDQ_013138

friction

type of friction between ice skates and ice

null

Multiple Choice

a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction

e

12,522

NDQ_013139

friction

any substance that can flow and take the shape of its container

null

Multiple Choice

a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction

d

12,523

NDQ_013140

friction

force that opposes motion between any two surfaces

null

Multiple Choice

a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction

a

12,524

NDQ_013141

friction

type of friction between shoes and pavement

null

Multiple Choice

a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction

b

12,525

NDQ_013142

friction

type of friction between a parachute and air

null

Multiple Choice

a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction

c

12,526

NDQ_013143

friction

type of friction between roller skates and concrete

null

Multiple Choice

a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction

g

12,527

NDQ_013144

friction

type of friction between an object and a gas or liquid

null

Multiple Choice

a. friction, b. static friction, c. air resistance, d. fluid, e. sliding friction, f. fluid friction, g. rolling friction

f

12,528

NDQ_013153

gravity

The SI unit for weight is the

null

Multiple Choice

a. gram., b. kilogram., c. newton., d. pound.

c

12,529

NDQ_013155

gravity

Newtons law of universal gravitation states that the force of gravity

null

Multiple Choice

a. affects all objects in the universe., b. is stronger for objects with more mass., c. is stronger for objects that are closer together., d. all of the above

d

12,530

NDQ_013157

gravity

Gravity causes all objects to

null

Multiple Choice

a. attract one another., b. have projectile motion., c. accelerate when they fall toward Earth., d. two of the above

d

12,531

NDQ_013158

gravity

The only reason that a leaf falls to the ground more slowly than an acorn is that the leaf has

null

Multiple Choice

a. less mass., b. more air resistance., c. a weaker force of gravity., d. less acceleration due to gravity.

b

12,532

NDQ_013161

gravity

On Earth, a mass of 1 kilogram exerts a downward force due to gravity of about

null

Multiple Choice

a. 1 N., b. 5 N., c. 10 N., d. 15 N.

c

12,533

NDQ_013165

gravity

Satellites orbit Earth because of gravity.

null

Multiple Choice

a. true, b. false

a

12,534

NDQ_013168

gravity

An object has a greater mass on Earth than it does on the moon.

null

Multiple Choice

a. true, b. false

b

12,535

NDQ_013170

gravity

Molecules of gas are attracted toward one another by gravity.

null

Multiple Choice

a. true, b. false

a

12,536

NDQ_013171

gravity

All of the solar systems in the universe formed because of gravity.

null

Multiple Choice

a. true, b. false

a

12,537

NDQ_013172

gravity

The mass of an object affects its force of gravity.

null

Multiple Choice

a. true, b. false

a

12,538

NDQ_013173

gravity

Gravity acts only between objects that are close together or touching.

null

Multiple Choice

a. true, b. false

b

12,539

NDQ_013174

gravity

Objects that are closer together have a weaker force of gravity.

null

Multiple Choice

a. true, b. false

b

12,540

NDQ_013175

gravity

All objects have the same acceleration due to gravity.

null

Multiple Choice

a. true, b. false

a

12,541

NDQ_013176

gravity

Earth has stronger gravity than the moon.

null

Multiple Choice

a. true, b. false

a

12,542

NDQ_013177

gravity

The curved path of an arrow is called its orbit.

null

Multiple Choice

a. true, b. false

b

12,543

NDQ_013178

gravity

Weight is measured with a balance.

null

Multiple Choice

a. true, b. false

b

12,544

NDQ_013179

gravity

People have known about gravity for thousands of years.

null

Multiple Choice

a. true, b. false

a

12,545

NDQ_013180

gravity

The moon has both forward velocity and acceleration toward Earth.

null

Multiple Choice

a. true, b. false

a

12,546

NDQ_013181

gravity

Einsteins theory of gravity is better than Newtons law of gravity at predicting how all objects move.

null

Multiple Choice

a. true, b. false

a

12,547

NDQ_013182

gravity

Einstein defined gravity as a force of attraction between objects with mass.

null

Multiple Choice

a. true, b. false

b

12,548

NDQ_013183

gravity

SI unit for weight

null

Multiple Choice

a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton

g

12,549

NDQ_013184

gravity

motion of an object subject to horizontal force and the force of gravity

null

Multiple Choice

a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton

e

12,550

NDQ_013185

gravity

force of attraction between two masses

null

Multiple Choice

a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton

a

12,551

NDQ_013186

gravity

scientist who proposed that gravity is due to curves in space and time

null

Multiple Choice

a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton

f

12,552

NDQ_013187

gravity

measure of the force of gravity

null

Multiple Choice

a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton

d

12,553

NDQ_013188

gravity

path of one object around another, such as the moon around Earth

null

Multiple Choice

a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton

c

12,554

NDQ_013189

gravity

scientist who proposed the law of universal gravitation

null

Multiple Choice

a. gravity, b. Isaac Newton, c. orbit, d. weight, e. projectile motion, f. Albert Einstein, g. newton

b

12,555

NDQ_013190

gravity

Gravity always causes objects to

null

Multiple Choice

a. repel each other., b. circle each other., c. attract each other., d. two of the above

c

12,556

NDQ_013191

gravity

Unlike friction, gravity

null

Multiple Choice

a. is a force., b. acts over a distance., c. acts between objects that are not touching., d. two of the above

d

12,557

NDQ_013192

gravity

What does weight measure?

null

Multiple Choice

a. size, b. mass, c. force, d. volume

c

12,558

NDQ_013193

gravity

Jody has a mass of 50 kilograms. What is his weight on Earth?

null

Multiple Choice

a. 5N, b. 50 N, c. 500 N, d. 5000 N

c

12,559

NDQ_013194

gravity

There is gravity between you and

null

Multiple Choice

a. Earth., b. the moon., c. your desk., d. all of the above

d

12,560

NDQ_013195

gravity

The moon orbits Earth rather than the sun because

null

Multiple Choice

a. the suns gravity is weaker than Earths., b. the moon is smaller than Earth., c. Earth already orbits the sun., d. the moon is closer to Earth.

d

12,561

NDQ_013196

gravity

An object with greater mass

null

Multiple Choice

a. has greater acceleration when it falls., b. has a weaker force of gravity., c. is less affected by gravity., d. has greater weight.

d

12,562

NDQ_013197

elastic force

Which of the following items has the property of elasticity?

null

Multiple Choice

a. rubber band, b. paper clip, c. toothpick, d. iron nail

a

12,563

NDQ_013198

elastic force

force exerted on a material that is pulled apart

null

Multiple Choice

a. elastic force, b. stretching force, c. compressing force, d. elasticity, e. spring

b

12,564

NDQ_013199

elastic force

structure that returns to its original shape after being stretched or compressed

null

Multiple Choice

a. elastic force, b. stretching force, c. compressing force, d. elasticity, e. spring

e

12,565

NDQ_013200

elastic force

When does an elastic material exert elastic force?

null

Multiple Choice

a. before it is stretched, b. as it is stretched, c. when it is released, d. two of the above

d

12,566

NDQ_013201

elastic force

force exerted on a material that is pushed together

null

Multiple Choice

a. elastic force, b. stretching force, c. compressing force, d. elasticity, e. spring

c

12,567

NDQ_013202

elastic force

What happens when you pull on a bungee cord?

null

Multiple Choice

a. It stretches., b. It resists the change in shape., c. It exerts force in the opposite direction., d. all of the above

d

12,568

NDQ_013203

elastic force

When you jump on a trampoline, the surface of the trampoline

null

Multiple Choice

a. changes shape., b. exerts elastic force., c. pushes you up into the air., d. all of the above

d

12,569

NDQ_013204

elastic force

counter force exerted by an elastic material that is stretched or compressed

null

Multiple Choice

a. elastic force, b. stretching force, c. compressing force, d. elasticity, e. spring

a

12,570

NDQ_013205

elastic force

Elastic force causes an elastic material to

null

Multiple Choice

a. push back when pulled., b. return to its original shape., c. take the shape of its container., d. two of the above

d

12,571

NDQ_013206

elastic force

ability of a material to return to its original shape after being stretched or compressed

null

Multiple Choice

a. elastic force, b. stretching force, c. compressing force, d. elasticity, e. spring

d

12,572

NDQ_013208

elastic force

Something that is elastic springs back after being stretched.

null

Multiple Choice

a. true, b. false

a

12,573

NDQ_013210

elastic force

An elastic material resists a change in shape.

null

Multiple Choice

a. true, b. false

a

12,574

NDQ_013211

elastic force

Elastic force is not very useful.

null

Multiple Choice

a. true, b. false

b

12,575

NDQ_013214

elastic force

When you use a resistance band, resistance comes from elastic force.

null

Multiple Choice

a. true, b. false

a

12,576

NDQ_013216

elastic force

Glass is an example of an elastic material.

null

Multiple Choice

a. true, b. false

b

12,577

NDQ_013217

elastic force

Items that are elastic include

null

Multiple Choice

a. metal wires., b. concrete blocks., c. plastic spring toys., d. all of the above

c

12,578

NDQ_013218

elastic force

When you compress a spring, it resists the change in shape.

null

Multiple Choice

a. true, b. false

a

12,579

NDQ_013219

elastic force

A rubber band keeps a newspaper tightly rolled because it

null

Multiple Choice

a. can be tied tightly., b. exerts elastic force., c. is unbreakable., d. none of the above

b

12,580

NDQ_013220

elastic force

Paper is an example of an elastic material.

null

Multiple Choice

a. true, b. false

b

12,581

NDQ_013221

elastic force

When you compress a spring, it

null

Multiple Choice

a. resists the change in shape., b. exerts a force in the same direction., c. permanently changes to a new shape., d. two of the above

a

12,582

NDQ_013222

elastic force

As you stretch a bungee cord, its elastic force gets stronger.

null

Multiple Choice

a. true, b. false

a

12,583

NDQ_013223

elastic force

When you release a stretched bungee cord, it returns to its original shape because of gravity.

null

Multiple Choice

a. true, b. false

b

12,584

NDQ_013224

elastic force

Springs are used in

null

Multiple Choice

a. beds., b. cars., c. scales., d. all of the above

d

12,585

NDQ_013225

elastic force

Something that is elastic returns to its original shape after being compressed.

null

Multiple Choice

a. true, b. false

a

12,586

NDQ_013226

elastic force

What happens when the stretching force on an elastic material is released?

null

Multiple Choice

a. The material breaks., b. The material remains stretched out., c. The material starts to exert elastic force., d. The material snaps back to its original shape.

d

12,587

NDQ_013232

newtons first law

Newtons first law of motion is also called the law of

null

Multiple Choice

a. mass., b. inertia., c. velocity., d. unbalanced forces.

b

12,588

NDQ_013233

newtons first law

Newtons first law of motion states than an objects motion will not change unless

null

Multiple Choice

a. the net force acting on it is greater than zero., b. a force continues to be applied to the object., c. its inertia is stronger than the applied force., d. the object has no inertia.

a

12,589

NDQ_013234

newtons first law

Overcoming an objects inertia always requires a(n)

null

Multiple Choice

a. large mass., b. massive force., c. unbalanced force., d. two of the above

c

12,590

NDQ_013235

newtons first law

Once an applied force causes an object to start moving, the object keeps moving because

null

Multiple Choice

a. the force continues to be applied to it., b. no other force is acting on it., c. it has inertia., d. none of the above

c

12,591

NDQ_013236

newtons first law

It is more difficult to start a 50-kg box sliding across the floor than a 5-kg box because the 50-kg box has greater

null

Multiple Choice

a. size., b. inertia., c. volume., d. velocity.

b

12,592

NDQ_013237

newtons first law

If the net force acting on any object is zero, the object will

null

Multiple Choice

a. not move., b. change its motion., c. have zero velocity., d. none of the above

d

12,593

NDQ_013238

newtons first law

Once an object starts moving along a clear path, it would keep moving at the same velocity if it were not for

null

Multiple Choice

a. inertia., b. friction., c. an unbalanced force., d. two of the above

d

12,594

NDQ_013239

newtons first law

If you run into a curb on your bike, you might fly forward over the handlebars because of

null

Multiple Choice

a. air resistance., b. inertia., c. friction., d. gravity.

b

12,595

NDQ_013240

newtons first law

An objects velocity will not change unless it is acted on by a(n)

null

Multiple Choice

a. net force., b. strong force., c. unbalanced force., d. opposite but equal force.

c

12,596

NDQ_013241

newtons first law

Inertia causes a stationary object to

null

Multiple Choice

a. start moving., b. remain stationary., c. have an increase in velocity., d. change its speed or direction.

b

12,597

NDQ_013242

newtons first law

The direction of a moving object will not change if the net force acting on it is

null

Multiple Choice

a. greater than zero., b. less than zero., c. zero., d. two of the above

c

12,598

NDQ_013245

newtons first law

Inertia is the tendency of an object to resist motion.

null

Multiple Choice

a. true, b. false

b

12,599

NDQ_013247

newtons first law

Newtons first law of motion is also called the law of acceleration.

null

Multiple Choice

a. true, b. false

b