Answer :
The convection currents in the student’s model different from the convection currents in earth’s atmosphere and oceans - the heat source for Earth’s atmosphere and oceans is the sun, which heats from above instead of below.
The correct option is b.
A heated fluid expands, becomes less dense, and rises, creating convection currents. The fluid sinks as it cools, contracts, and becomes denser.
Differential heating leads to convection currents. Warm, less dense, lighter stuff rises whereas cool, more dense, heavier material sinks. Convection currents are patterns of circulation that are produced by this movement in the Earth's mantle, oceans, and atmosphere.
Convection is the flow of hot particles into a region of colder particles in order to transfer heat. When you light a match, convection can occur. There is always more heat in the air directly above a lighted match than in the air surrounding it.
The complete question is:
A student models convection currents in a laboratory activity. How are the convection currents in the student’s model different from the convection currents in Earth’s atmosphere and oceans?
a. The warm air in Earth’s atmosphere and the warm water in Earth’s oceans sink instead of rise.
b. The heat source for Earth’s atmosphere and oceans is the sun, which heats from above instead of below.
c. Convection cells in Earth’s atmosphere and oceans flow in the same direction instead of opposite directions.
d. Cold air in Earth’s atmosphere and cold water in Earth’s oceans are less dense than warm air and warm water instead of being more dense.
To learn more convection currents, refer
https://brainly.com/question/12841408
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