Question

question 1 of 10
which is a step of the convection cycle in earths atmosphere?
a. cold, less - dense air falls.
b. cold, denser air rises.
c. hot, less - dense air rises.
d. hot, less - dense air falls.

Explanation:

To determine the correct step of the convection cycle in Earth’s atmosphere, we analyze the properties of air related to temperature, density, and movement:

• Cold air is denser (not less - dense), so options A and B are incorrect.
• Hot air expands, becomes less dense. Less - dense substances rise in a fluid (like air, which acts as a fluid in convection). So hot, less - dense air rises. Option D is incorrect as hot, less - dense air should rise, not fall.

Answer:

C. Hot, less - dense air rises.