our world 5B UNIT 6,7

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"our world 5B UNIT 6,7"에 대한 내용입니다.

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1. Unit 7 Volcanoes
2. National Geographic Our World 5B Unit 6 Amazing Plants!

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volcano erupts melted cracks surface explodes heat steam
inside gases calm deep creates ash cover thick

Go for a walk on a sunny day. The Earth seems under your feet. But down, it is not. Under the Earth’s crust, it is so hot that rock is . This melted rock is called magma.

In some places, there are deep in the of the Earth. These cracks let magma come to the surface. The magma pushes up the Earth’s crust. It a mountain – a !

A volcano when magma onto the surface.

The flow of melted rock is called lava. The lava is thrown into the air and flows down the volcano. The of the lava burns everything it touches. The blast of an eruption throws into the air. The steam is created from water the Earth.

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