Question

What are the main causes of convection currents in the asthenosphere?

O density and temperature
O density and weight
O temperature and pressure
O weight and pressure
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Answer 1

Convection currents in the asthenosphere are caused by temperature and pressure. When the asthenosphere is heated, it becomes less dense and rises, creating a region of low pressure. When it cools, it becomes more dense and sinks, creating a region of high pressure.

Step-by-step explanation:

Convection currents in the asthenosphere are mainly caused by temperature and pressure. As the asthenosphere is heated from the Earth's interior, it becomes less dense and rises. This creates a region of low pressure. On the other hand, as the asthenosphere cools near the Earth's surface, it becomes more dense and sinks, creating a region of high pressure.

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