Question

From passive to active 1) The earth's crust is made up of large lumps called plates. 2) Natural forest fires are usually started by lightning . 3) Volcanic eruptions are sometimes caused by two plates crashing together.

Answer 1

1. large lumps called plates make the earth's crust

2. Lightning usually starts natural forest fires

3.two plates crashing together sometimes cause volcanic eruptions

Answer 2

1. Large lumps called plates make up the Earth's crust.
2. Lightning is the usual cause of natural forest fires.
3. Two plates crashing together sometimes cause volcanic eruptions.