Reading · Grade 3
Volcanoes
Name Date Score
A volcano is an opening in the Earth's surface. Deep underground, it is so hot that rock melts into a thick liquid called magma. When pressure builds up, the magma pushes its way up and bursts out of the volcano. Once it reaches the surface, the melted rock is called lava. Lava is extremely hot and glows bright orange. As lava cools, it hardens into new rock. Over many eruptions, this new rock can build a tall mountain.
What is melted rock underground called?
What is melted rock called once it reaches the surface?
What color does hot lava glow?
What happens to lava as it cools?
What can many eruptions build over time?
Answer Key
- Magma.
- Lava.
- Bright orange.
- It hardens into new rock.
- A tall mountain.