Inside a Volcano

In the picture

1. 1Magma chamber: a deep underground pool of hot molten rock.
2. 2Central vent: a narrow channel that carries molten rock upward.
3. 3Summit crater: a bowl-shaped opening at the top where lava and ash come out.

Examples

• A tube of toothpaste: squeezing the bottom pushes paste out of the top opening.
• A kettle with a spout: steam and water move from inside to the opening at the top.

Quiz: Inside a Volcano (Age 9)

1. 1

   What is the difference between magma and lava?

   • Magma is molten rock underground, and lava is molten rock that reaches the surface.
   • Magma is molten rock that reaches the surface, and lava is molten rock underground.
   • Magma and lava are both ash that comes out of a summit crater.
2. 2

   What does a volcano’s central vent connect?

   • The summit crater to a pool of water underground.
   • The magma chamber to the outside of the volcano below the crater.
   • The magma chamber to the summit crater.
3. 3

   Where do lava and ash come out of a volcano?

   • From the summit crater at the top.
   • From the magma chamber deep underground.
   • From the central vent inside the mountain, before the top.

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.