Beneath Our Feet: The Four Layers Of Earth Geology Worksheet Template With Answer Key (Page 2 of 4) in pdf

Beneath Our Feet: The Four Layers Of Earth Geology Worksheet Template With Answer Key Page 2

The final layer is the inner core, which is 900 miles

deep. Scientists believe the inner core is a solid ball of

iron and other minerals. The temperature is extremely hot,

somewhere between 9,000 and 13,000 degrees

Fahrenheit. But because of the high pressure, the iron

and other minerals cannot melt. The heat of the inner

core is sometimes compared to the heat of the sun.

Have you ever seen pictures of

Are you wondering why the Earth is made up of

lava pouring down the sides of a

four different layers? Many scientists believe that the

volcano?

Earth wasn’t always like this. They believe that when the

The molten rock inside the Earth's

Earth was formed, it was a hot ball made up of a

mantle is called magma. When it

erupts through a volcano, it's

mixture of rock and metals. They think that as the Earth

called lava.

cooled, the heavier parts sank to the inside and the

When it cools, the lava will harden

lighter materials rose to the top. This would explain why

and form new soil and rock, which

the inner core is made up of iron and the crust consists of

will become part of the Earth's

crust.

lighter rock and loose material.

As you walk around and enjoy the beauty on the Earth’s surface, think about the many layers

beneath your feet. It takes all these layers to make up the planet we call home.

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Beneath Our Feet: The Four Layers Of Earth Geology Worksheet Template With Answer Key Page 2