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

Question

Responses

1) temperature and pressure

2) density and temperature

3) weight and pressure

4) density and weight

Answer 1

The main causes of convection currents in the asthenosphere are primarily related to differences in density and temperature. As material in the asthenosphere is heated from below (due to the heat from the Earth's core), it becomes less dense and rises. Conversely, cooler material is denser and sinks. This cycle creates convection currents.

So, the correct response is:

2) density and temperature.