What is the term for molten rock that exists beneath the Earth's surface?

What is the term for molten rock that exists beneath the Earth's surface?

• A. Magma
• B. Lava
• C. Mantle
• D. Crust

Answer: (A)

The main idea here is knowing the word for molten rock based on where it is. Molten rock that exists beneath the Earth's surface is magma. It stays underground in magma chambers within the crust or upper mantle. When magma reaches the surface and erupts, it becomes lava. The crust and mantle are solid layers, not molten rock, which is why magma is the correct term for underground molten rock. Magma forms when rocks melt under high temperature and pressure, and it can crystallize underground to form intrusive rocks or erupt to form surface rocks once it reaches the surface.

The main idea here is knowing the word for molten rock based on where it is. Molten rock that exists beneath the Earth's surface is magma. It stays underground in magma chambers within the crust or upper mantle. When magma reaches the surface and erupts, it becomes lava. The crust and mantle are solid layers, not molten rock, which is why magma is the correct term for underground molten rock. Magma forms when rocks melt under high temperature and pressure, and it can crystallize underground to form intrusive rocks or erupt to form surface rocks once it reaches the surface.