Why are erosional coasts prone to become smooth and straight shorelines?
A) Wave refraction
B) Wave energy focuses on headlands
C) Sediments begin to collect at beaches
D) All of these choices
Question 2
Humid air is ____ than dry air because molecules of water vapor ____ than molecules of nitrogen and oxygen at the same temperature.
A) more dense; weigh more
B) less dense; weigh less
C) more dense; weigh less
D) less dense; weigh more