How are clouds made?
Correct answer: D. When water releases heat
- A. When water absorbs heat
- B. When ice melts
- C. When it is too hot
- D. When water releases heat
Explanation
Clouds are formed when water vapors condense to form water droplets (an exothermic process, so heat is released), which form a floating layer in the sky.
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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