Q: What is it called when plants release water vapor through their leaves? Choices: - propagation - evaporation - respiration - transpiration A:
transpiration

Q: What process converts the sun's hydrogen nuclei into helium? Choices: - solar fission - nuclear fission - combustion - nuclear fusion A:
nuclear fusion

Q: The direct conversion of a solid to a gas, without an intervening liquid phase, is called what? Choices: - amplification - isolation - insertion - sublimation A:
sublimation