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. dissolves expands and contracts cools and hardens

Explanation:

Convection currents occur in the mantle. Magma (molten rock) in the mantle is affected by heat from Earth's interior. When magma is heated, it expands (becomes less dense) and rises. As it moves upward, it cools (loses heat to the cooler layers above), contracts (becomes denser), and sinks back down. This continuous cycle of expansion, rising, cooling, contraction, and sinking forms convection currents. The option "expands and contracts" describes the key behavior of magma in the process of convection current formation. "Dissolves" is not relevant as magma is already molten. "Cools and hardens" would be more related to magma when it reaches the surface (like when lava cools) rather than the internal convection - current - related behavior in the mantle.

Answer:

First blank: mantle; Second blank: expands and contracts.