Science & Nature

When a Volcano Erupts

A talk explaining what happens inside a volcano before and during an eruption.

B17 min

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1Deep under the ground, hot melted rock builds up great pressure.

2This melted rock, called magma, is hotter than a thousand degrees.

3When the pressure becomes too strong, the magma pushes upward through cracks.

4The volcano erupts, and red lava flows down the side of the mountain.

5Thick clouds of dark ash rise high into the sky.

6Sometimes the ash travels hundreds of kilometres and covers nearby towns.

7People who live near volcanoes must be ready to leave quickly.

8Scientists watch volcanoes carefully with special machines day and night.

9After many years, the ash makes the soil rich and good for farming.

10That is why many farmers still live close to these dangerous mountains.

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