Why do volcanoes erupt answers

A final way that magma rises is over hot spots. Hot spots are exactly what they sound like--hot areas inside of Earth. These areas heat up magma. The magma becomes less dense. When it is less dense it rises. Each of the reasons for rising magma are a bit different, but each can form volcanoes.

There have been a lot of volcanoes on other planets in the past. Some places in our solar system have active volcanoes erupting right now! Venus and Mars are covered with extinct volcanoes. Some of the moons of Jupiter, Saturn, and Neptune actually have eruptions happening right now.

If aeroplanes travel through an ash cloud from a volcano it can cause a lot of damage to the engine. Other explosive eruptions create fast-moving, hot clouds of volcanic ash, gas and rocks that travel down the sides of the volcanoes and destroy pretty much everything in their path. Despite the great damage they can cause, volcanoes also help us to live. Volcanic ash provides food for the soil around volcanoes which helps us grow plants to eat.

You can find some more information about different types of volcanoes here and here. The Conversation. Wednesday 24 April am. Image: Pixabay. How the magma lava behaves when it reaches the surface depends on both its gas content and chemical composition. Lavas with low silica contents have low viscosities and flow freely, allowing any gas bubbles to escape readily, while lavas with high silica contents are more viscous resistant to flow , so that any trapped gases cannot escape gradually.

Mount Garibaldi, a potentially active volcano in southwest British Columbia, located within 30 km of the towns of Whistler and Squamish. How the silica and gas content of lava affect volcano eruptive behaviour. Skip to main content Skip to "About this site".

It is very sharp and is dangerous to breathe in. Some explosive volcanoes can send ash high up into the sky and it can travel around the world over different countries. If aeroplanes travel through an ash cloud from a volcano it can cause a lot of damage to the engine. Other explosive eruptions create fast-moving, hot clouds of volcanic ash, gas and rocks that travel down the sides of the volcanoes and destroy pretty much everything in their path.

Despite the great damage they can cause, volcanoes also help us to live. Volcanic ash provides food for the soil around volcanoes which helps us grow plants to eat. You can find some more information about different types of volcanoes here and here. Read more: Curious Kids: Do most volcanologists die from getting too close to volcanoes? Hello, curious kids!