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The Earth
I) How does the motion of the earth
cause day and night?

The Earth rotates on its axis. When the side is
facing the sun it is day and when it is facing away
from the sun it is night.

This spinning in a circle on its axis is also called
ROTATION
_________________.
II) In addition to rotating on its
axis, the Earth also travels around
Orbit
the sun in a path called an ______.
This motion around the sun along its orbit is
REVOLUTION
called ____________.
The other planets in our solar system also
revolve around, or orbit, the sun.
The Earth revolves around the sun in ______
365 1/4
days. Mercury’s orbit is 88 days
III) The Earth’s Interior
3 distinct
The Earth’s Interior is divided into ___
layers according to the composition of its
materials.
1. The Crust
OUTERMOST
-The _____________
layer of Earth.
- It is 5 km (bottom of ocean) – 100 km thick
2. The Mantle
BELOW
- Lies __________
the crust
(30 - 2,900 km below the surface)
- made from dense rock
70% of Earth's volume.
- occupies about ____
- temperatures range between 100°C
4,000°C at the edge of core
to over _______
3. The Core
- the center of our Earth
OUTER
- _________
core is liquid,
made from a metallic nickel-iron mixture
SOLID due to the enormous
- inner core is ________
pressure at the center of the planet
- ranges 2900 km - almost 6400 km deep
2900 to 5100 km = Outer core
5100 to 6378 km = Inner core