What is the difference between magma and lava?

Question

Quizplus · Accepted Answer

The main difference between magma and lava is that magma is molten rock beneath the Earth's surface, while lava is molten rock that has reached the Earth's surface. Therefore, lava can be seen on the surface, whereas magma cannot.

Answer: D 
 Another difference is that magma can contain pyroclasts (pieces of rock that are blasted out of a volcano during an eruption), while lava typically does not. Magma can also contain more dissolved gases and suspended crystals than lava, due to the differences in pressure and temperature between magma beneath the Earth's surface and lava on the surface.

What Is the Difference Between Magma and Lava