Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids

The people in the submarines saw anemones like this in the
deepest part of the ocean. 3
They found rocks that look like those in the photograph. So the crust
rock lies under the oceans as well as under our feet. The crust is a
layer of rock all around the Earth, like the shell of a hard-boiled egg.
The mantle and the core lie even deeper under the
crust.
If we go deeper than the crust, we go into rock called the mantle.
The mantle is the layer that lies underneath the crust. Mantle rock
is much hotter than the rock that is found in the crust. The rocks
are so hot that they are soft in some places, like toothpaste. If
there is aweak spot in the crust, the hot rock pushes upwards and
it might burst out. This is how volcanoes happen. The mantle is
2 900 km thick, so we still have a long way to go down.
QUESTIONS
Find the mantle in the diagram of the Earth cut open. Mark
it with your pencil. How could you get to the mantle? Which
way do you have to go?
You would have to dig a very deep hole down into the centre
of the Earth.
The core is still deeper than the mantle. It is very hot, as hot as the
surface of the Sun, and made of mostly iron.
Chapter 2. Surface of the Earth
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