Question

a student drew a diagram to illustrate convection currents in the atmosphere.
student diagram of convection currents
air movement high above the surface
air movement near the surface
land
water
how should the diagram be changed to accurately illustrate atmospheric convection currents?
a. add coral and fish to the water to represent energy flow.
b. add trees and bushes to the land to represent transpiration.
c. add an arrow pointing up from the land to represent warm air rising and an arrow pointing down over the water to represent cool air sinking.
d. add an arrow pointing down over the land to represent cool air sinking and an arrow pointing up from the water to represent warm air rising.

Explanation:

To accurately illustrate atmospheric convection currents, we analyze the options:

• Option A: Adding coral and fish is irrelevant to convection currents (which involve air movement due to temperature differences), so A is incorrect.
• Option B: Transpiration (water vapor release from plants) is not the focus of atmospheric convection over land - water, so B is incorrect.
• Option C: During the day, land heats up faster than water. Warm air rises over land (so an upward arrow over land), and cool air sinks over water (downward arrow over water) to complete the convection cycle. This matches the principles of atmospheric convection.
• Option D: The description here is incorrect as warm air rises over land (not water) and cool air sinks over water (not land) during the day, so D is incorrect.

Answer:

C. Add an arrow pointing up from the land to represent warm air rising and an arrow pointing down over the water to represent cool air sinking.