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13,500 | NDQ_014834 | earth as a magnet | Scientists no longer accept the idea of magnetic reversals. | null | null | Multiple Choice | a. true, b. false | b |
13,501 | NDQ_014835 | earth as a magnet | The magnetosphere | null | null | Multiple Choice | a. completely surrounds Earth., b. is found only near Earths poles., c. exists over a region larger than Earth., d. two of the above | d |
13,502 | NDQ_014836 | earth as a magnet | Earths magnetic field occurs only over the north and south poles. | null | null | Multiple Choice | a. true, b. false | b |
13,503 | NDQ_014837 | earth as a magnet | Earths magnetic force is exerted over a distance. | null | null | Multiple Choice | a. true, b. false | a |
13,504 | NDQ_014838 | earth as a magnet | Which statement about magnetic reversals is false? | null | null | Multiple Choice | a. Magnetic reversals have occurred hundreds of times., b. The most recent magnetic reversal occurred 330 million years ago., c. There is hard evidence showing that magnetic reversals have occurred., d. Scientists do not know for certain why magnetic reversals have occurred. | b |
13,505 | NDQ_014839 | earth as a magnet | The idea that Earth is a magnet was first proposed | null | null | Multiple Choice | a. by William Gilbert in 1800., b. after seismographs were developed., c. before scientists learned about Earths inner structure., d. around the same time that Earths outer core was discovered. | c |
13,506 | NDQ_014840 | earth as a magnet | Many migrating birds | null | null | Multiple Choice | a. navigate using Earths magnetic field., b. may be able to see Earths magnetic field., c. have natural compasses that they use for migration., d. all of the above | d |
13,507 | NDQ_014841 | earth as a magnet | about 80 north latitude | null | null | Multiple Choice | a. magnetosphere, b. north geographic pole, c. outer core, d. north magnetic pole, e. magnetic reversal, f. compass, g. inner core | d |
13,508 | NDQ_014842 | earth as a magnet | solid sphere that makes up Earths center | null | null | Multiple Choice | a. magnetosphere, b. north geographic pole, c. outer core, d. north magnetic pole, e. magnetic reversal, f. compass, g. inner core | g |
13,509 | NDQ_014843 | earth as a magnet | exactly 90 north latitude | null | null | Multiple Choice | a. magnetosphere, b. north geographic pole, c. outer core, d. north magnetic pole, e. magnetic reversal, f. compass, g. inner core | b |
13,510 | NDQ_014844 | earth as a magnet | region deep inside Earth that consists of liquid metals | null | null | Multiple Choice | a. magnetosphere, b. north geographic pole, c. outer core, d. north magnetic pole, e. magnetic reversal, f. compass, g. inner core | c |
13,511 | NDQ_014845 | earth as a magnet | Earths magnetic field | null | null | Multiple Choice | a. magnetosphere, b. north geographic pole, c. outer core, d. north magnetic pole, e. magnetic reversal, f. compass, g. inner core | a |
13,512 | NDQ_014846 | earth as a magnet | switching of Earths north and south magnetic poles | null | null | Multiple Choice | a. magnetosphere, b. north geographic pole, c. outer core, d. north magnetic pole, e. magnetic reversal, f. compass, g. inner core | e |
13,513 | NDQ_014847 | earth as a magnet | navigation device that always points north | null | null | Multiple Choice | a. magnetosphere, b. north geographic pole, c. outer core, d. north magnetic pole, e. magnetic reversal, f. compass, g. inner core | f |
13,514 | NDQ_015029 | types of matter | homogeneous mixture in which particles are too small to be seen | null | null | Multiple Choice | a. colloid, b. compound, c. element, d. mixture, e. solution, f. suspension, g. crystal | e |
13,515 | NDQ_015030 | types of matter | The most common element in Earths crust is | null | null | Multiple Choice | a. water., b. iron., c. hydrogen., d. oxygen. | d |
13,516 | NDQ_015031 | types of matter | combination of two or more substances in any proportions | null | null | Multiple Choice | a. colloid, b. compound, c. element, d. mixture, e. solution, f. suspension, g. crystal | d |
13,517 | NDQ_015032 | types of matter | The smallest particle of an element that still has the elements properties is a(n) | null | null | Multiple Choice | a. crystal., b. compound., c. atom., d. molecule. | c |
13,518 | NDQ_015033 | types of matter | homogeneous mixture in which particles are big enough to reflect light | null | null | Multiple Choice | a. colloid, b. compound, c. element, d. mixture, e. solution, f. suspension, g. crystal | a |
13,519 | NDQ_015034 | types of matter | Aristotle thought there were four elements, including | null | null | Multiple Choice | a. air., b. earth., c. water., d. all of the above. | d |
13,520 | NDQ_015035 | types of matter | Whenever elements combine physically, they form | null | null | Multiple Choice | a. mixtures., b. solutions., c. compounds., d. suspensions. | a |
13,521 | NDQ_015036 | types of matter | heterogeneous mixture | null | null | Multiple Choice | a. colloid, b. compound, c. element, d. mixture, e. solution, f. suspension, g. crystal | f |
13,522 | NDQ_015037 | types of matter | unique substance that forms when two or more elements combine chemically | null | null | Multiple Choice | a. colloid, b. compound, c. element, d. mixture, e. solution, f. suspension, g. crystal | b |
13,523 | NDQ_015038 | types of matter | Which of the following is the best example of a heterogeneous mixture? | null | null | Multiple Choice | a. raisin bran, b. milk, c. orange juice, d. water | a |
13,524 | NDQ_015040 | types of matter | rigid, lattice-like framework of many ions bonded together | null | null | Multiple Choice | a. colloid, b. compound, c. element, d. mixture, e. solution, f. suspension, g. crystal | g |
13,525 | NDQ_015041 | types of matter | pure substance that cannot be separated into any other substances | null | null | Multiple Choice | a. colloid, b. compound, c. element, d. mixture, e. solution, f. suspension, g. crystal | c |
13,526 | NDQ_015043 | types of matter | I am lighter than air and used to fill balloons. Which element am I? | null | null | Multiple Choice | a. neon, b. carbon, c. oxygen, d. helium | d |
13,527 | NDQ_015046 | types of matter | Iron and nickel are both | null | null | Multiple Choice | a. elements., b. metals., c. compounds., d. two of the above. | d |
13,528 | NDQ_015048 | types of matter | Which statement is false about the atoms of a given element? | null | null | Multiple Choice | a. They are all alike., b. They are the same as the atoms of all other elements., c. They have properties of the given element., d. They all have the same structure. | b |
13,529 | NDQ_015049 | types of matter | Atoms of the same element are all alike. | null | null | Multiple Choice | a. true, b. false | a |
13,530 | NDQ_015050 | types of matter | John Dalton made all the following contributions to our knowledge of atoms except | null | null | Multiple Choice | a. doing research to show atoms exist., b. introducing modern ideas about atoms., c. developing a theory of the atom., d. arguing that atoms do not exist. | d |
13,531 | NDQ_015051 | types of matter | Each compound has a unique set of properties. | null | null | Multiple Choice | a. true, b. false | a |
13,532 | NDQ_015052 | types of matter | Which drink is an example of a compound? | null | null | Multiple Choice | a. lemonade, b. ice tea, c. vanilla milkshake, d. water | d |
13,533 | NDQ_015053 | types of matter | An example of a heterogeneous mixture is | null | null | Multiple Choice | a. salt water., b. gelatin., c. milk., d. trail mix. | d |
13,534 | NDQ_015054 | types of matter | Atoms can be seen with a hand lens. | null | null | Multiple Choice | a. true, b. false | b |
13,535 | NDQ_015055 | types of matter | Which mixture has the largest particles? | null | null | Multiple Choice | a. muddy water, b. salt water, c. milk, d. lemonade | a |
13,536 | NDQ_015056 | types of matter | There are millions of different elements in the universe. | null | null | Multiple Choice | a. true, b. false | b |
13,537 | NDQ_015057 | types of matter | A crystal consists of molecules that are bonded together. | null | null | Multiple Choice | a. true, b. false | b |
13,538 | NDQ_015058 | types of matter | Each element has a unique set of properties. | null | null | Multiple Choice | a. true, b. false | a |
13,539 | NDQ_015059 | types of matter | The idea of elements was first introduced by John Dalton. | null | null | Multiple Choice | a. true, b. false | b |
13,540 | NDQ_015060 | types of matter | Most elements are found in compounds. | null | null | Multiple Choice | a. true, b. false | a |
13,541 | NDQ_015061 | types of matter | A compound has the same properties as the substances it contains. | null | null | Multiple Choice | a. true, b. false | b |
13,542 | NDQ_015062 | types of matter | A molecule consists of two or more atoms. | null | null | Multiple Choice | a. true, b. false | a |
13,543 | NDQ_015063 | types of matter | Table salt is an example of a compound that forms molecules. | null | null | Multiple Choice | a. true, b. false | b |
13,544 | NDQ_015064 | types of matter | The substances in a mixture may be elements or compounds. | null | null | Multiple Choice | a. true, b. false | a |
13,545 | NDQ_015065 | types of matter | A package of mixed seeds is a homogeneous mixture. | null | null | Multiple Choice | a. true, b. false | b |
13,546 | NDQ_015066 | types of matter | Mixtures are classified on the basis of particle size. | null | null | Multiple Choice | a. true, b. false | a |
13,547 | NDQ_015067 | types of matter | Components of mixtures rarely can be separated. | null | null | Multiple Choice | a. true, b. false | b |
13,548 | NDQ_015259 | inside the atom | electrically neutral atomic particle inside the nucleus of an atom | null | null | Multiple Choice | a. electron, b. ion, c. isotope, d. neutron, e. nucleus, f. proton, g. quark | d |
13,549 | NDQ_015260 | inside the atom | The smallest particles of an element that still have the elements properties are | null | null | Multiple Choice | a. quarks., b. gluons., c. protons., d. atoms. | d |
13,550 | NDQ_015261 | inside the atom | atom that differs in its number of neutrons from other atoms of the same element | null | null | Multiple Choice | a. electron, b. ion, c. isotope, d. neutron, e. nucleus, f. proton, g. quark | c |
13,551 | NDQ_015262 | inside the atom | Which statement is true about the nucleus of an atom? | null | null | Multiple Choice | a. It makes up most of the atoms volume., b. It makes up most of the atoms mass., c. It contains protons and electrons., d. It is neutral in electric charge. | b |
13,552 | NDQ_015263 | inside the atom | negatively charged atomic particle that moves around the nucleus of an atom | null | null | Multiple Choice | a. electron, b. ion, c. isotope, d. neutron, e. nucleus, f. proton, g. quark | a |
13,553 | NDQ_015264 | inside the atom | The strong force explains why | null | null | Multiple Choice | a. electrons are attracted to the nucleus., b. the nucleus does not fly apart., c. electrons are smaller than protons., d. none of the above | b |
13,554 | NDQ_015265 | inside the atom | The mass number of an atom is its number of | null | null | Multiple Choice | a. electrons., b. protons., c. neutrons., d. protons plus neutrons. | d |
13,555 | NDQ_015266 | inside the atom | positively charged atomic particle inside the nucleus of an atom | null | null | Multiple Choice | a. electron, b. ion, c. isotope, d. neutron, e. nucleus, f. proton, g. quark | f |
13,556 | NDQ_015267 | inside the atom | type of particle that makes up protons and neutrons | null | null | Multiple Choice | a. electron, b. ion, c. isotope, d. neutron, e. nucleus, f. proton, g. quark | g |
13,557 | NDQ_015268 | inside the atom | When a fluorine atom gains an electron, it becomes a(n) | null | null | Multiple Choice | a. positive ion., b. isotope., c. cation., d. anion. | d |
13,558 | NDQ_015270 | inside the atom | charged particle that forms when atom gains or loses electron(s) | null | null | Multiple Choice | a. electron, b. ion, c. isotope, d. neutron, e. nucleus, f. proton, g. quark | b |
13,559 | NDQ_015271 | inside the atom | tiny region at the center of an atom that contains protons and neutrons | null | null | Multiple Choice | a. electron, b. ion, c. isotope, d. neutron, e. nucleus, f. proton, g. quark | e |
13,560 | NDQ_015279 | inside the atom | All protons are exactly the same. | null | null | Multiple Choice | a. true, b. false | a |
13,561 | NDQ_015281 | inside the atom | Electrons have the same mass as protons. | null | null | Multiple Choice | a. true, b. false | b |
13,562 | NDQ_015284 | inside the atom | Atoms may be positive or negative in charge. | null | null | Multiple Choice | a. true, b. false | b |
13,563 | NDQ_015286 | inside the atom | All atoms of a given element have the same number of electrons. | null | null | Multiple Choice | a. true, b. false | a |
13,564 | NDQ_015287 | inside the atom | There are three quarks in each neutron. | null | null | Multiple Choice | a. true, b. false | a |
13,565 | NDQ_015288 | inside the atom | Atoms are the smallest particles of matter. | null | null | Multiple Choice | a. true, b. false | b |
13,566 | NDQ_015289 | inside the atom | An atom always has the same number of electrons as neutrons. | null | null | Multiple Choice | a. true, b. false | b |
13,567 | NDQ_015290 | inside the atom | The nucleus is at the center of the atom. | null | null | Multiple Choice | a. true, b. false | a |
13,568 | NDQ_015291 | inside the atom | Atoms have no electric charge. | null | null | Multiple Choice | a. true, b. false | a |
13,569 | NDQ_015292 | inside the atom | The strong force keeps electrons moving around the nucleus. | null | null | Multiple Choice | a. true, b. false | b |
13,570 | NDQ_015293 | inside the atom | Electrons have almost no mass. | null | null | Multiple Choice | a. true, b. false | a |
13,571 | NDQ_015294 | inside the atom | The mass of an atom equals the sum of its protons and neutrons. | null | null | Multiple Choice | a. true, b. false | a |
13,572 | NDQ_015295 | inside the atom | For most elements, isotopes are named for their atomic number. | null | null | Multiple Choice | a. true, b. false | b |
13,573 | NDQ_015296 | inside the atom | Each proton consists of three quarks. | null | null | Multiple Choice | a. true, b. false | a |
13,574 | NDQ_015297 | inside the atom | Quarks are held together by gluons. | null | null | Multiple Choice | a. true, b. false | a |
13,575 | NDQ_015298 | inside the atom | If an atom were the size of a football stadium, the nucleus would be about the size of a | null | null | Multiple Choice | a. microwave oven., b. basketball., c. pea., d. car. | c |
13,576 | NDQ_015299 | inside the atom | The number of protons in atoms is | null | null | Multiple Choice | a. the same for all atoms., b. unique for each element., c. always equal to the number of neutrons., d. none of the above | b |
13,577 | NDQ_015300 | inside the atom | The strong force | null | null | Multiple Choice | a. affects only nearby particles., b. is stronger than electric force., c. is not effective if the nucleus is too big., d. all of the above | d |
13,578 | NDQ_015301 | inside the atom | A neutron has the same mass as a(n) | null | null | Multiple Choice | a. nucleus., b. electron., c. proton., d. quark. | c |
13,579 | NDQ_015302 | inside the atom | A nitrogen atom has an atomic number of 7 and a mass number of 14. How many protons, neutrons, and electrons does it have? | null | null | Multiple Choice | a. 7 protons, 14 neutrons, 7 electrons, b. 14 protons, 7 neutrons, 7 electrons, c. 7 protons, 7 neutrons, 7 electrons, d. 7 protons, 7 neutrons, 14 electrons | c |
13,580 | NDQ_015303 | inside the atom | If an atom loses electrons, it becomes a(n) | null | null | Multiple Choice | a. isotope., b. cation., c. anion., d. gluon. | b |
13,581 | NDQ_015304 | inside the atom | How many neutrons are there in the most common isotope of hydrogen? | null | null | Multiple Choice | a. zero, b. one, c. two, d. three | a |
13,582 | NDQ_015306 | history of the atom | Which statement is not part of the original atomic theory? | null | null | Multiple Choice | a. Atoms consist of smaller particles of matter., b. Atoms cannot be created or destroyed., c. All atoms of the same element have the same mass., d. Atoms join together to form compounds. | a |
13,583 | NDQ_015308 | history of the atom | John Dalton thought that an atom is like a(n) | null | null | Multiple Choice | a. plum pudding., b. solar system., c. hard solid ball., d. vacuum tube. | c |
13,584 | NDQ_015310 | history of the atom | The scientist who discovered protons was | null | null | Multiple Choice | a. John Dalton., b. J, c. Ernest Rutherford., d. James Chadwick. | c |
13,585 | NDQ_015311 | history of the atom | Aristotle thought that | null | null | Multiple Choice | a. atoms exist., b. atoms are uncuttable., c. all matter consists of atoms., d. the idea of atoms is ridiculous. | d |
13,586 | NDQ_015314 | history of the atom | Rutherford concluded from his experiments that | null | null | Multiple Choice | a. all the positive charge of an atom is concentrated in the center., b. positive charge is spread evenly throughout an atom., c. electrons orbit the positively charged nucleus., d. two of the above | d |
13,587 | NDQ_015319 | history of the atom | scientist who discovered electrons. | null | null | Multiple Choice | a. Democritus, b. Aristotle, c. John Dalton, d. J, e. Ernest Rutherford, f. plum pudding model, g. planetary model | d |
13,588 | NDQ_015322 | history of the atom | philosopher who thought the idea of the atom was ridiculous | null | null | Multiple Choice | a. Democritus, b. Aristotle, c. John Dalton, d. J, e. Ernest Rutherford, f. plum pudding model, g. planetary model | b |
13,589 | NDQ_015324 | history of the atom | Thomsons atomic model | null | null | Multiple Choice | a. Democritus, b. Aristotle, c. John Dalton, d. J, e. Ernest Rutherford, f. plum pudding model, g. planetary model | f |
13,590 | NDQ_015325 | history of the atom | Thomson aimed a beam of alpha particles at gold foil. | null | null | Multiple Choice | a. true, b. false | b |
13,591 | NDQ_015326 | history of the atom | philosopher who introduced the idea of the atom | null | null | Multiple Choice | a. Democritus, b. Aristotle, c. John Dalton, d. J, e. Ernest Rutherford, f. plum pudding model, g. planetary model | a |
13,592 | NDQ_015327 | history of the atom | The plums in the plum pudding model represent protons. | null | null | Multiple Choice | a. true, b. false | b |
13,593 | NDQ_015328 | history of the atom | Rutherfords atomic model | null | null | Multiple Choice | a. Democritus, b. Aristotle, c. John Dalton, d. J, e. Ernest Rutherford, f. plum pudding model, g. planetary model | g |
13,594 | NDQ_015329 | history of the atom | scientist who developed atomic theory | null | null | Multiple Choice | a. Democritus, b. Aristotle, c. John Dalton, d. J, e. Ernest Rutherford, f. plum pudding model, g. planetary model | c |
13,595 | NDQ_015330 | history of the atom | The planets in the planetary model represent electrons. | null | null | Multiple Choice | a. true, b. false | a |
13,596 | NDQ_015331 | history of the atom | scientist who discovered the nucleus | null | null | Multiple Choice | a. Democritus, b. Aristotle, c. John Dalton, d. J, e. Ernest Rutherford, f. plum pudding model, g. planetary model | e |
13,597 | NDQ_015332 | history of the atom | The first subatomic particle to be discovered was the proton. | null | null | Multiple Choice | a. true, b. false | b |
13,598 | NDQ_015333 | history of the atom | Dalton thought that all substances are made of atoms. | null | null | Multiple Choice | a. true, b. false | a |
13,599 | NDQ_015334 | history of the atom | The history of the atom began almost | null | null | Multiple Choice | a. 2500 years ago., b. 700 years ago., c. 500 years ago., d. 100 years ago. | a |
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