- Some volcanoes do not explode.
- This happens because of gas bubbles in magma.
- Gas bubbles form when pressure drops or because of movement.
- Movement makes the bubbles grow and can let gas out.
- Some volcanoes, like Mount St. Helens, flow slowly instead of exploding.
- Researchers study how bubbles form to understand eruptions better.
Difficult words
- volcano — A mountain that can erupt with lava.volcanoes
- explode — To burst suddenly with force.exploding
- magma — Hot liquid rock inside the Earth.
- bubble — A small round ball of gas in liquid.bubbles
- pressure — The force on something from all sides.
- researcher — A person who studies or investigates.Researchers
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- What do you think about volcanoes?
- Have you seen a volcano?
- Why is it important to study eruptions?
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