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17 Cards in this Set
- Front
- Back
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An example of a prediction is
a. feeling wet, and determining that it is raining. b. seeing a thunder cloud and assuming that it will rain soon. c. guessing that there will be three more hurricanes this season. d. determining the probable path of a hurricane based on its current position. |
d. determining the probable path of a hurricane based on its current position.
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A(n) _____ is and explanation of observations.
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inference
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The existence of gravity can be considered a _____.
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scientific law
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How gravity works as explained by Einstein is a _____.
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scientific theory
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How might you design an experiment that would test which bird seed, type A or type B, wild birds like the best.
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Answers may vary. Sample answer: Set out .25 kg of of each type of bird seed on the same day for the same amount of time, and see how much is left of each kind. Whichever bird seed has less seed remaining, the birds like better.
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Why is it important for scientists not to follow a rigid path when trying to find the answer to a question?
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Answers may vary. Sample answer: They could find something that doesn't support their hypothesis and have to restart the experiment.
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Use the table below to answer the following question.
Cricket 15°C 20°C 25°C 1 91 135 180 2 80 124 169 3 89 130 176 4 78 125 158 5 77 121 157 Average 83 127 168 Five crickets were used in this experiment. Why was it so important for the scientists to use several subjects (crickets)? |
Answers may vary. Sample answer: You can get an average to get more accurate results.
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As gas particles are heated, what happens?
a. The pressure decreases. b. Collision of particles decreases. c. Particles chemically change. d. The pressure increases. |
d. The pressure increases.
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When a man wearing glasses enters a warm house after being outside on a cold day, his glasses fog up because of
a. vaporization. b. condensation. c. freezing. d. melting. |
b. condensation.
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After taking a shower, you notice water droplets covering your bathroom mirror. Describe where this water comes from and the process that caused it to form.
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Answers may vary. Sample answer: When you take a warm shower, some of the water turns into water vapor, and when it hits the cool surface of the mirror, it condenses to form water droplets.
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Which of the following scientists inferred that an atom's positive charge must be clustered in the nucleus?
a. Niels Bohr b. Ernest Rutherford c. J.J. Thomson d. John Dalton |
b. Ernest Rutherford
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If an element undergoes radioactive decay and emits and alpha particle, which is true?
a. An electron is given off and a new element with higher atomic number is created as a neutron becomes a proton + electron. b. A helium nucleus is given off and a new element with an atomic mass of 4 less is created. c. Gamma radiation which is the same as an alpha particle, is given off. d. Gamma radiation which is the same as a beta particle, is given off. |
b. A helium nucleus is given off and a new element with an atomic mass of 4 less is created.
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The next question will be answered from the eight choices here.
a. Dalton b. Democritus c. Bohr d. Mendeleev e. Rutherford f. Thomson g. Chadwick h. Schrodenger This man created the planetary model of the atom. |
c. Bohr
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Answer the following question about radioactive decay.
a. gamma b. alpha c. beta These particles are emitted electrons. |
c. beta
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Answer the following question about radioactive decay.
a. gamma b. alpha c. beta This decay produces an element with a higher atomic number. |
c. beta
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Answer the following question about radioactive decay.
a. gamma b. alpha c. beta This radioactive decay always accompanies the other two kinds of decay. |
a. gamma
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Answer the following question about radioactive decay.
a. gamma b. alpha c. beta This decay does not cause a change in the atomic number of the element. |
a. gamma
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