Answer the following question given this paragraph: Refrigerator magnets stick to a refrigerator door because it contains iron. Why won't the magnets stick to wooden cabinet doors?. Q: What do refrigerator magnets contain that make them stick to a refrigerator door? A:
OPTIONS:
- steel
- zinc
- copper
- iron
iron
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Answer the following question given this paragraph: The radius of an atom is approximately 10 times larger than the radius of its nucleus. If the radius of the nucleus were 1.0 cm, what would be the radius of the atom in centimeters? in miles?. Q: Approximately how much larger is the radius of an atom than that of its nucleus? A:
OPTIONS:
- 1 times
- 1000 times
- 100 times
- 10 times
10 times
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Answer the following question given this paragraph: Collision theory states that chemical reactions occur when atoms, ions, or molecules collide. In other words, these species need to make contact with one another in order for a reaction to take place. Based on this concept, along with a couple of other key points, collision theory helps to explain why certain factors will influence the rate of a chemical reaction. Q: What states that chemical reactions occur when atoms, ions, or molecules collide? A:
OPTIONS:
- disturbance theory
- reaction theory
- elemental theory
- collision theory
collision theory
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Answer the following question given this paragraph: Oceans are an important part of the water cycle. They absorb gases from the atmosphere. They evaporate and supply water vapor to the atmosphere. Q: Where do oceans absorb gases from? A:
OPTIONS:
- stratosphere
- wind
- sunlight
- atmosphere
atmosphere
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