Chapter 4 Revision Material

1) What do we call the first or the outermost layer of the Earth?

• a) Mantle

• b) Crust

• c) Inner core

• d) Outer core

2) What is the composition of this layer (crust) of the Earth?

• a) Molten rocks

• b) Magma

• c) Rock and Dirt

• d) Metals

3) What do we call the third or innermost layer of the Earth?

• a) Mantle

• b) Crust

• c) Atmosphere

• d) Core

4) What is the composition of this layer (core) of the Earth?

• a) Metals

• b) Magma

• c) Rock and Dirt

• d) Molten rocks

5) What do we call the second outermost layer of the Earth?

• a) Crust

• b) Mantle

• c) Inner Core

• d) Outer Core

6) What is the composition of this layer (mantle) of the Earth?

• a) Metals

• b) Magma

• c) Rock and Dirt

• d) 78% nitrogen, 21% oxygen, and one percent other gases

7) Here is a picture of a volcano, which of the following statements best describes how it is formed.

• a) Magma is produced on the surface of the ground, solidifying into a volcano.

• b) Volcanoes give birth to other volcanoes.

• c) Magma rises from the mantle as lava through the cracks in the Earth's surface forming volcanoes.

• d) Layers of dirt pile up to form a volcano.

8) Where does the lava that comes out from the volcano's crater come from?

• a) Inner core

• b) Outer core

• c) Mantle

• d) Crust

9) Which of the following is not a direct result of volcano eruption on land?

• a) Tsunami

• b) Destruction of the surrounding environment.

• c) Contamination of water and air in the surrounding environment.

• d) Death of living things in the surrounding environment.

10) What should we do in the event of a volcano eruption in our area?

• a) Panic

• b) Evacuate our homes and move to a safe place.

• c) Stay in our houses near the volcano.

• d) Cover our nose and mouth to not inhale the ash smoke.