[Q]: Which two processes could result in the formation of high mountains with well-rounded peaks?
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OPTIONS:
- volcanic eruptions and global warming
- earthquakes and tidal activity
- collision of crustal plates and erosion
- production of greenhouse gases and weathering
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[A]: collision of crustal plates and erosion

[Q]: A gas is heated and its temperature increases. What happens to the gas molecules?
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OPTIONS:
- They get bigger.
- They move faster.
- They move slower.
- They increase in number.
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[A]: They move faster.

[Q]: Which statement about photosynthesis and respiration is true?
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OPTIONS:
- Photosynthesis stores energy and respiration releases energy.
- Respiration stores energy and photosynthesis releases energy.
- Photosynthesis and respiration are the same process.
- Photosynthesis and respiration do not have anything to do with energy.
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[A]:
Photosynthesis stores energy and respiration releases energy.