6.4 VOLCANOES

Question 1

What are volcanoes?

Answer 1

An opening in the Earth’s crust

Question 2

Substances which escape from volcanoes:

Answer 2

1. Liquid rock
   - Magma (Under and inside the volcano)
   - Lava (Above ground)
2. Volcanic bombs
   - Solid
3. Ash
   - Solid
4. Sulfur dioxide
   - Gas
5. Carbon dioxide
   - Gas
6. Water vapour
   - Gas

Question 3

Where are volcanoes?

Answer 3

Plate tectonics
Hot spots

Question 4

How scientists predict eruptions:

Answer 4

1. Measure the steepness of the volcano slope
2. Amount of sulfur dioxide gas coming out of the volcano
3. Earth movements near the volcano