Download Earth`s Origins

Earth’s Origins, Layers, and Spheres Study Guide
Earth's Origins
Name the origin theory that goes with each of the following descriptions:
1.
____________________________

In the beginning, all matter was concentrated into a dense, dark spot that began to
shrink.

Pressure built up and caused a massive explosion. Everything went flying into space
in all directions.

Evidence support this theory is that things in space seem to be moving away from a
certain point.

Further evidence is the discovery of radiation
2. _______________________________

God created the universe and everything in it.

Evidence of this theory is that there are many things that cannot be explained by
humans, and, it seems as though some things were preplanned.
3. ______________________________

Two stars (one of them being the Sun) passed by each other and pulled pieces off of
each other.

These pieces were caught by the gravitational pull of the closer star (Sun). This
event formed the planets, asteroids, meteorites, and so on.

Evidence of this theory is the revolution of the planets around the Sun.
Earth’s Structure: Layers and Spheres

Which of the cores is liquid?

About how thick is the crust beneath the ocean?

About how thick is the crust beneath the continents?

What materials make up the crust?

Name the four layers of the earth, in correct order.

The ground you walk on is which sphere?
Earth’s Origins, Layers, and Spheres Study Guide

Where is most of the earth’s salt water?
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About how thick is the outer core?

What are the three spheres we discussed in class?
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About how large is the mantle?
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What materials make up the cores?
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Where is the earth’s fresh water?
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Where can you find the lithosphere?
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Which part of the mantle is solid?

How thick is the mantel?
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Where is most of the earth’s fresh water?
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Which layers make up the center of the Earth?
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About how thick are the inner and outer cores together?
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Which layer do we live on?
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Under the rocks and soil, is the crust liquid or solid?
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Which part of the mantle is liquid and has a consistency like silly putty?
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Which of the sphere’s makes up the earth’s gas layer?

What are the two important gases living things need to survive?

How many parts make up the mantle and what are they?

Which of the cores is solid?
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About how thick is the inner core?
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Which sphere is the solid part of the Earth?
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Which sphere is Earth’s waters?
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Salt water makes up about how much of the hydrosphere?

Which sphere makes up the air we breath?