Question

select the correct answer from each drop - down menu.complete the sentence about convection currents inside earth.convection currents are formed in earths , which contains magma. magma is molten rock. magma due to the heat from earths interior.dissolvesexpands and contractscools and hardens

Explanation:

Convection currents occur in the mantle. The mantle contains magma. When magma is heated (by Earth's interior heat), it expands (becomes less dense) and rises. When it cools (loses heat as it moves upward), it contracts (becomes more dense) and sinks. This cycle of expansion (when heated) and contraction (when cooled) creates convection currents.

Answer:

First blank (assuming options for first blank include'mantle'): mantle. Second blank: expands and contracts.