Tuesday 16 December 2008

Volcanoes and Earthquakes


What makes a volcano?

Gas and magma make volcanoes.

Why do they rise?

It isn't the earth's surface that rises. Whilst at the earth's surface the magma turns into lava. The lava makes a hill as it cools. This happens time and time again.

There is only one type of volcano is an area. Various gases, and ash are realased when a volcano occurs.

There are at least 1500 active volcanoes on our very earth. There are at least 80 or more underneath the sea.

What are plates?

Plates are what make up the earth's crust. These sometimes move.

2 comments:

  1. By Rosie Whillock and Lauren Yemm
    The first earthquake was recorded in 1769 in California. The largest recorded earthquake was in Alaska on good Friday 1964.
    They are measured on a Richter Scale. The bigger the number the bigger earthquake.

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  2. They are created by plates under the earths crust that sometimes grind together.

    ReplyDelete