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14,100 | NDQ_016016 | carbon and living things | The only biochemical compounds that contains sulfur are nucleic acids. | null | null | Multiple Choice | a. true, b. false | b |
14,101 | NDQ_016017 | carbon and living things | Hemoglobin is a protein that fights infections in the blood. | null | null | Multiple Choice | a. true, b. false | b |
14,102 | NDQ_016018 | carbon and living things | The most abundant biochemical compound is cellulose. | null | null | Multiple Choice | a. true, b. false | a |
14,103 | NDQ_016019 | carbon and living things | Hemoglobin transports oxygen through the blood. | null | null | Multiple Choice | a. true, b. false | a |
14,104 | NDQ_016020 | carbon and living things | Muscle tissues are composed mainly of fatty acids. | null | null | Multiple Choice | a. true, b. false | b |
14,105 | NDQ_016021 | carbon and living things | Organisms use lipids mainly to store energy. | null | null | Multiple Choice | a. true, b. false | a |
14,106 | NDQ_016022 | carbon and living things | There are two main types of nucleic acids. | null | null | Multiple Choice | a. true, b. false | a |
14,107 | NDQ_016023 | carbon and living things | long carbon chains found in lipids | null | null | Multiple Choice | a. carbohydrates, b. lipids, c. proteins, d. nucleic acids, e. macromolecules, f. fatty acids, g. amino acids | f |
14,108 | NDQ_016024 | carbon and living things | class of biochemical compounds that includes oils | null | null | Multiple Choice | a. carbohydrates, b. lipids, c. proteins, d. nucleic acids, e. macromolecules, f. fatty acids, g. amino acids | b |
14,109 | NDQ_016025 | carbon and living things | general name given to biochemical polymers | null | null | Multiple Choice | a. carbohydrates, b. lipids, c. proteins, d. nucleic acids, e. macromolecules, f. fatty acids, g. amino acids | e |
14,110 | NDQ_016026 | carbon and living things | class of biochemical compounds that includes DNA | null | null | Multiple Choice | a. carbohydrates, b. lipids, c. proteins, d. nucleic acids, e. macromolecules, f. fatty acids, g. amino acids | d |
14,111 | NDQ_016027 | carbon and living things | building blocks of proteins | null | null | Multiple Choice | a. carbohydrates, b. lipids, c. proteins, d. nucleic acids, e. macromolecules, f. fatty acids, g. amino acids | g |
14,112 | NDQ_016028 | carbon and living things | class of biochemical compounds that includes cellulose | null | null | Multiple Choice | a. carbohydrates, b. lipids, c. proteins, d. nucleic acids, e. macromolecules, f. fatty acids, g. amino acids | a |
14,113 | NDQ_016029 | carbon and living things | class of biochemical compounds that includes enzymes | null | null | Multiple Choice | a. carbohydrates, b. lipids, c. proteins, d. nucleic acids, e. macromolecules, f. fatty acids, g. amino acids | c |
14,114 | NDQ_016030 | carbon and living things | Which of the following is one of the four main classes of biochemical compounds? | null | null | Multiple Choice | a. sugars, b. starches, c. cellulose, d. carbohydrates | d |
14,115 | NDQ_016031 | carbon and living things | All biochemical compounds include carbon, hydrogen, and | null | null | Multiple Choice | a. sulfur., b. oxygen., c. nitrogen., d. phosphorus. | b |
14,116 | NDQ_016032 | carbon and living things | Organisms use carbohydrates mainly for | null | null | Multiple Choice | a. energy., b. cell membranes., c. hormones., d. antibodies. | a |
14,117 | NDQ_016033 | carbon and living things | The function of a given protein depends on its | null | null | Multiple Choice | a. overall shape., b. sequence of amino acids., c. number of amino acid chains., d. all of the above | d |
14,118 | NDQ_016034 | carbon and living things | Which statement about saturated fatty acids is true? | null | null | Multiple Choice | a. They have only single bonds between carbon atoms., b. They are used by plants to store energy., c. They make up lipids known as oils., d. They are always in the liquid state. | a |
14,119 | NDQ_016035 | carbon and living things | Nitrogen bases found in both DNA and RNA include | null | null | Multiple Choice | a. glycine., b. adenine., c. thymine., d. uracil. | b |
14,120 | NDQ_016036 | carbon and living things | Which of the following is a function of RNA? | null | null | Multiple Choice | a. fighting infections, b. reading the genetic code, c. carrying substances in the blood, d. all of the above | b |
14,121 | NDQ_016037 | biochemical reactions | Reactants in cellular respiration include | null | null | Multiple Choice | a. oxygen., b. water., c. carbon dioxide., d. two of the above | a |
14,122 | NDQ_016038 | biochemical reactions | All organisms make food by photosynthesis. | null | null | Multiple Choice | a. true, b. false | b |
14,123 | NDQ_016039 | biochemical reactions | The synthesis of glucose requires carbon dioxide. | null | null | Multiple Choice | a. true, b. false | a |
14,124 | NDQ_016040 | biochemical reactions | The human enzyme named pepsin catalyzes the digestion of | null | null | Multiple Choice | a. nucleic acids., b. fatty acids., c. proteins., d. sugars. | c |
14,125 | NDQ_016041 | biochemical reactions | Insect-catching plants such as pitcher plants obtain glucose from insects. | null | null | Multiple Choice | a. true, b. false | b |
14,126 | NDQ_016042 | biochemical reactions | The compound that cells break down to release energy is | null | null | Multiple Choice | a. chlorophyll., b. carbon dioxide., c. water., d. glucose. | d |
14,127 | NDQ_016043 | biochemical reactions | Energy for photosynthesis comes from | null | null | Multiple Choice | a. water., b. soil., c. light., d. chemicals. | c |
14,128 | NDQ_016044 | biochemical reactions | Chemical reactions provide living cells with energy. | null | null | Multiple Choice | a. true, b. false | a |
14,129 | NDQ_016045 | biochemical reactions | Photosynthesis is an exothermic, or energy-releasing, process. | null | null | Multiple Choice | a. true, b. false | b |
14,130 | NDQ_016046 | biochemical reactions | Which equation correctly represents photosynthesis? | null | null | Multiple Choice | a. C6 H12 O6 + 6O2 + energy 6CO2 + 6H2 O, b. 6CO2 + 6O2 + energy C6 H12 O6 + 6H2 O, c. C6 H12 O6 + 6CO2 + energy 6O2 + 6H2 O, d. 6CO2 + 6H2 O + energy C6 H12 O6 + 6O2 | d |
14,131 | NDQ_016047 | biochemical reactions | The overall chemical reaction for photosynthesis is represented by the equation: C6 H12 O6 + 6O2 6CO2 | null | null | Multiple Choice | a. true, b. false | b |
14,132 | NDQ_016050 | biochemical reactions | Products of cellular respiration include many small, energy-storing molecules. | null | null | Multiple Choice | a. true, b. false | a |
14,133 | NDQ_016051 | biochemical reactions | Cellular respiration takes place only in organisms that cannot make their own food. | null | null | Multiple Choice | a. true, b. false | b |
14,134 | NDQ_016054 | biochemical reactions | The process of cellular respiration requires carbon dioxide. | null | null | Multiple Choice | a. true, b. false | b |
14,135 | NDQ_016056 | biochemical reactions | One of the products of cellular respiration is oxygen. | null | null | Multiple Choice | a. true, b. false | b |
14,136 | NDQ_016057 | biochemical reactions | All living things need energy just to stay alive. | null | null | Multiple Choice | a. true, b. false | a |
14,137 | NDQ_016059 | biochemical reactions | Cellular respiration is an endothermic, or energy-absorbing, process. | null | null | Multiple Choice | a. true, b. false | b |
14,138 | NDQ_016061 | biochemical reactions | Only plants can carry out photosynthesis. | null | null | Multiple Choice | a. true, b. false | b |
14,139 | NDQ_016064 | biochemical reactions | Cellular respiration occurs in all living cells | null | null | Multiple Choice | a. true, b. false | a |
14,140 | NDQ_016065 | biochemical reactions | One of the products of cellular respiration is oxygen. | null | null | Multiple Choice | a. true, b. false | b |
14,141 | NDQ_016069 | biochemical reactions | process in which cells break down glucose and release energy | null | null | Multiple Choice | a. photosynthesis, b. biochemical reaction, c. oxygen, d. cellular respiration, e. glucose, f. chlorophyll, g. enzyme | d |
14,142 | NDQ_016070 | biochemical reactions | any chemical reaction that takes place in living things | null | null | Multiple Choice | a. photosynthesis, b. biochemical reaction, c. oxygen, d. cellular respiration, e. glucose, f. chlorophyll, g. enzyme | b |
14,143 | NDQ_016071 | biochemical reactions | protein that speeds up biochemical reactions | null | null | Multiple Choice | a. photosynthesis, b. biochemical reaction, c. oxygen, d. cellular respiration, e. glucose, f. chlorophyll, g. enzyme | g |
14,144 | NDQ_016072 | biochemical reactions | byproduct of photosynthesis | null | null | Multiple Choice | a. photosynthesis, b. biochemical reaction, c. oxygen, d. cellular respiration, e. glucose, f. chlorophyll, g. enzyme | c |
14,145 | NDQ_016073 | biochemical reactions | compound that cells use for energy | null | null | Multiple Choice | a. photosynthesis, b. biochemical reaction, c. oxygen, d. cellular respiration, e. glucose, f. chlorophyll, g. enzyme | e |
14,146 | NDQ_016074 | biochemical reactions | pigment that captures light energy | null | null | Multiple Choice | a. photosynthesis, b. biochemical reaction, c. oxygen, d. cellular respiration, e. glucose, f. chlorophyll, g. enzyme | f |
14,147 | NDQ_016075 | biochemical reactions | process in which certain organisms make glucose | null | null | Multiple Choice | a. photosynthesis, b. biochemical reaction, c. oxygen, d. cellular respiration, e. glucose, f. chlorophyll, g. enzyme | a |
14,148 | NDQ_016076 | biochemical reactions | All living things need | null | null | Multiple Choice | a. carbon dioxide., b. sunlight., c. energy., d. two of the above | c |
14,149 | NDQ_016077 | biochemical reactions | Reactants in photosynthesis include | null | null | Multiple Choice | a. chlorophyll., b. oxygen., c. glucose., d. water. | d |
14,150 | NDQ_016078 | biochemical reactions | Types of organisms that make their own glucose include | null | null | Multiple Choice | a. algae., b. plants., c. cyanobacteria., d. all of the above | d |
14,151 | NDQ_016079 | biochemical reactions | All organisms that undergo photosynthesis contain | null | null | Multiple Choice | a. pepsin., b. amylase., c. chlorophyll., d. two of the above | c |
14,152 | NDQ_016080 | biochemical reactions | Cellular respiration releases some energy in the form of | null | null | Multiple Choice | a. heat., b. light., c. motion., d. electricity. | a |
14,153 | NDQ_016081 | biochemical reactions | Amylase catalyzes the breakdown of | null | null | Multiple Choice | a. lipids., b. proteins., c. nucleic acids., d. complex carbohydrates. | d |
14,154 | NDQ_016082 | acceleration | acceleration always refers to a(n) | null | null | Multiple Choice | a. increase in speed., b. change in speed., c. change in direction., d. change in velocity. | d |
14,155 | NDQ_016084 | acceleration | acceleration is a vector. | null | null | Multiple Choice | a. true, b. false | a |
14,156 | NDQ_016085 | acceleration | a change in direction without a change in speed is called velocity. | null | null | Multiple Choice | a. true, b. false | b |
14,157 | NDQ_016086 | acceleration | acceleration can never be negative. | null | null | Multiple Choice | a. true, b. false | b |
14,158 | NDQ_016096 | acceleration due to gravity | a heavier object always falls to the ground more quickly than a lighter object. | null | null | Multiple Choice | a. true, b. false | b |
14,159 | NDQ_016097 | acceleration due to gravity | what is the velocity of an object that has been falling freely in a vacuum for 4 seconds? | null | null | Multiple Choice | a. 9.8 m/s, b. 10.1 m/s, c. 19.6 m/s, d. 39.2 m/s | d |
14,160 | NDQ_016099 | acceleration due to gravity | objects fall toward earth at a constant rate of speed. | null | null | Multiple Choice | a. true, b. false | b |
14,161 | NDQ_016100 | acceleration due to gravity | an object will experience more air resistance when it falls if it has greater | null | null | Multiple Choice | a. mass., b. weight., c. gravity., d. surface area. | d |
14,162 | NDQ_016101 | acceleration due to gravity | objects with different masses have the same gravitational force acting on them. | null | null | Multiple Choice | a. true, b. false | b |
14,163 | NDQ_016104 | accuracy and precision | if a measurement is precise, it must also be accurate. | null | null | Multiple Choice | a. true, b. false | b |
14,164 | NDQ_016105 | accuracy and precision | only accurate measurements are precise. | null | null | Multiple Choice | a. true, b. false | b |
14,165 | NDQ_016109 | accuracy and precision | which set of measurements best represents precision if the true value is 6.80 kg? | null | null | Multiple Choice | a. 6.80 kg, 6.70 kg, and 6.90 kg, b. 6.75 kg, 6.80 kg, and 6.85 kg, c. 5.80 kg, 6.80 kg, and 7.80 kg, d. 6.10 kg, 5.99 kg, and 6.11 kg | d |
14,166 | NDQ_016110 | accuracy and precision | which set of measurements best represents accuracy if the true value is 6.80 kg? | null | null | Multiple Choice | a. 6.80 kg, 6.70 kg, and 6.90 kg, b. 6.75 kg, 6.80 kg, and 6.85 kg, c. 5.80 kg, 6.80 kg, and 7.80 kg, d. 6.10 kg, 5.99 kg, and 6.11 kg | b |
14,167 | NDQ_016112 | acid base neutralization | pure water is an example of a neutral substance. | null | null | Multiple Choice | a. true, b. false | a |
14,168 | NDQ_016113 | acid base neutralization | when an acid dissolves in water, it produces | null | null | Multiple Choice | a. positive hydrogen ions., b. negative nonmetal ions., c. negative metal ions., d. two of the above | d |
14,169 | NDQ_016114 | acid base neutralization | when a base dissolves in water, it produces | null | null | Multiple Choice | a. positive hydroxide ions., b. positive metal ions., c. negative nonmetal ions., d. two of the above | b |
14,170 | NDQ_016119 | acid base neutralization | the reaction of hydrochloric acid and calcium carbonate produces | null | null | Multiple Choice | a. water., b. calcium chloride., c. carbon dioxide., d. all of the above | d |
14,171 | NDQ_016123 | activation energy | only endothermic reactions require activation energy. | null | null | Multiple Choice | a. true, b. false | b |
14,172 | NDQ_016125 | activation energy | the activation energy needed to start combustion in a car engine comes from | null | null | Multiple Choice | a. the gasoline., b. a spark plug., c. a piston., d. the key. | b |
14,173 | NDQ_016126 | activation energy | a chemical reaction will not occur unless reactants are moving. | null | null | Multiple Choice | a. true, b. false | a |
14,174 | NDQ_016127 | activation energy | all chemical reactions need a constant input of energy to continue. | null | null | Multiple Choice | a. true, b. false | b |
14,175 | NDQ_016128 | activation energy | exothermic reactions always need less activation energy than endothermic reactions. | null | null | Multiple Choice | a. true, b. false | b |
14,176 | NDQ_016143 | alkaline earth metals | all of the following are alkaline earth metals except | null | null | Multiple Choice | a. barium., b. sodium., c. calcium., d. magnesium. | b |
14,177 | NDQ_016144 | alkaline earth metals | properties of alkaline earth metals include | null | null | Multiple Choice | a. gray or silver color., b. low density., c. softness., d. all of the above | d |
14,178 | NDQ_016145 | alkaline earth metals | all alkaline earth metals have three valence electrons. | null | null | Multiple Choice | a. true, b. false | b |
14,179 | NDQ_016146 | alkaline earth metals | alkaline earth metals are the most reactive metals. | null | null | Multiple Choice | a. true, b. false | b |
14,180 | NDQ_016147 | alkaline earth metals | alkaline earth metals never exist as pure substances in nature. | null | null | Multiple Choice | a. true, b. false | a |
14,181 | NDQ_016150 | alkaline earth metals | diets that are too low in calcium may lead to | null | null | Multiple Choice | a. rickets., b. osteoporosis., c. bone fractures., d. all of the above | d |
14,182 | NDQ_016153 | alloys | alloys consist only of metallic elements. | null | null | Multiple Choice | a. true, b. false | b |
14,183 | NDQ_016154 | alloys | most metal objects are made of alloys rather than pure metals. | null | null | Multiple Choice | a. true, b. false | a |
14,184 | NDQ_016155 | alloys | which of the following is not an alloy? | null | null | Multiple Choice | a. chromium, b. bronze, c. brass, d. steel | a |
14,185 | NDQ_016157 | alloys | the alloy called stainless steel consists of | null | null | Multiple Choice | a. iron., b. carbon., c. nickel., d. all of the above | d |
14,186 | NDQ_016159 | alloys | the first alloy ever made was | null | null | Multiple Choice | a. sterling silver., b. steel., c. brass., d. bronze. | d |
14,187 | NDQ_016160 | alloys | brass is an alloy that is used for doorknobs and plumbing fixtures. | null | null | Multiple Choice | a. true, b. false | a |
14,188 | NDQ_016165 | alpha decay | an alpha particle is a | null | null | Multiple Choice | a. packet of energy., b. single electron., c. helium nucleus., d. none of the above | c |
14,189 | NDQ_016166 | alpha decay | what does the following nuclear symbol represent? | null | null | Multiple Choice | a. alpha particle, b. helium atom, c. helium ion, d. none of the above | a |
14,190 | NDQ_016167 | alpha decay | in the nuclear symbol 6 c, the superscript represents the | null | null | Multiple Choice | a. atomic number., b. mass number., c. valence number., d. group number. | b |
14,191 | NDQ_016168 | alpha decay | in the following nuclear equation for alpha decay, what is the missing subscript that will balance the equation? th + 42 he + energy 238 234 | null | null | Multiple Choice | a. 94, b. 92, c. 90, d. 88 | c |
14,192 | NDQ_016169 | alpha decay | an alpha particle consists of one proton and one neutron. | null | null | Multiple Choice | a. true, b. false | b |
14,193 | NDQ_016170 | alpha decay | alpha decay is the least dangerous type of radioactive decay. | null | null | Multiple Choice | a. true, b. false | a |
14,194 | NDQ_016182 | archimedes law | archimedes was a greek mathematician who lived more than 2000 years ago. | null | null | Multiple Choice | a. true, b. false | a |
14,195 | NDQ_016185 | archimedes law | archimedes determined that the volume of water displaced by an object placed in the water is equal to the objects | null | null | Multiple Choice | a. weight., b. volume., c. mass., d. density. | b |
14,196 | NDQ_016186 | archimedes law | a bigger object displaces less water than a smaller object. | null | null | Multiple Choice | a. true, b. false | b |
14,197 | NDQ_016188 | archimedes law | according to archimedes law, the buoyant force acting on an object equals the | null | null | Multiple Choice | a. weight of the object., b. weight of the displaced fluid., c. volume of the object., d. volume of the displaced fluid. | b |
14,198 | NDQ_016189 | archimedes law | archimedes law explains why some very heavy objects can float on water. | null | null | Multiple Choice | a. true, b. false | a |
14,199 | NDQ_016196 | artificial light | how does an incandescent light bulb produce visible light? | null | null | Multiple Choice | a. The bulb’s filament gets so hot that it glows., b. Gas inside the bulb gives off visible light., c. Electricity excites neon electrons in the bulb., d. two of the above | a |
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