GEOLOGY

EARTH SCIENCE

TECTONICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What causes convection current in the Earth?
A
The uneven heating on each layer inside the Earth.
B
The crusts outer layer.
C
The temperatures we feel outside.
D
None of the above
Explanation: 

Detailed explanation-1: -As the Sun’s rays warms the Earth’s surface, the air near surface absorbs heat and rises, creating convection currents. As the air rises in the troposphere, it cools, becomes denser, and sinks back toward the surface. Three major convection cells drive the prevailing weather patterns, climate, and ocean currents.

Detailed explanation-2: -Convection currents are heat-driven cycles that occur in the air, ocean, and mantle. They are caused by a difference in temperature, often due to a differing proximity to a heat source. The difference in temperature relates directly to the density of the material, causing this effect.

Detailed explanation-3: -Usually when we talk about uneven heating of the Earth’s surface we are discussing convection. The uneven heating results in some of the atmosphere to be warmer than other parts and changes in volume and pressure which result in updrafts and can cause thunderstorms and other violent weather.

Detailed explanation-4: -Wind is the movement of air, caused by the uneven heating of the Earth by the sun and the Earth’s own rotation.

Detailed explanation-5: -The main heat transfer mechanism in the Earth’s mantle is convection, a thermally driven process where heating at depth causes material to expand and become less dense, causing it to rise while being replaced by complimentary cool material that sinks.

There is 1 question to complete.