156. What is the term used to describe the measure of the amount of carbon dioxide that is present in the atmosphere?
A) Carbon footprint
B) Carbon cycle
C) Greenhouse effect
D) Carbon dioxide concentration
Answer: D) Carbon dioxide concentration
157. Which of the following is not a type of volcano?
A) Shield volcano
B) Stratovolcano
C) Cinder cone volcano
D) Pyroclastic volcano
Answer: D) Pyroclastic volcano
158. What is the term used to describe the measure of the amount of energy that is required to change the state of a substance from a solid to a gas?
A) Heat of sublimation
B) Heat of vaporization
C) Heat of fusion
D) Heat capacity
Answer: A) Heat of sublimation