Transcript The inner planets

Planets
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Planets are much smaller
than Stars
Our planets are held in their
orbits by the pull of gravity
from the Sun.
The inner planets
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The inner planets are the 4
planets closest to the Sun.
These planets are: Mercury,
Venus, Earth, Mars.
Inner Planet Surface
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All Four inner planets have
a hard rocky surface.
These are called the
terrestrial planets because
terra is Latin for earth.
They are the smallest of the
planets in the solar system.
Mercury
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The closest planet to the Sun
The smallest planet in the
solar system, about the size
of our moon.
Mercury
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It goes around the sun every
88 days and is mainly made
up of iron.
Mercury has no natural
satellites(moons).
Venus
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This is the second planet
from the sun and about the
same size as earth.
It is the hottest planet with
an average temperature of
460 degrees C.
Venus has no natural
satellites.
Venus
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Venus rotates so slowly on
its axis that a day on Venus
is longer than a year on
Venus. It also rotates in
the opposite direction of
Earth, east to west.
Venus has a very dense
atmosphere that is made up
of CO2 and Sulfuric Acid
and it is so heavy it would
crush a human.
Earth
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Third Planet from the
sun. Only Planet that
has a protective
magnetic field and
liquid water on its
surface and water vapor
in its atmosphere.
Earth
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Hard surface and moving
liquid inner core, creating a
protective magnetic field..
Has one natural satellite
{our moon}.
Mars
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The fourth planet from the
sun and the last terrestrial
planet. It is called the Red
Planet because it is covered
in red dust.
It has two natural satellites
and is about ½ the size of
the earth.
Mars
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Mars once had oceans and
rivers but now does not have
any liquid water.
Because of its tilted axis,
Mars has seasons and frozen
CO2 ice fields at its poles.
Mars is the only planet that
we have landed a remote
controlled rover and
explored its surface.
Asteroid Belt
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Asteroids are giant pieces of
rock that are floating in
space.
Most of the asteroids are
located between Mars and
Jupiter in an area called the
Asteroid Belt.
Asteroid Belt
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1.
2.
There are two theories
on why it is here:
It was a planet that
never formed
It was a planet that
has fallen apart or
crumbled
Meteors
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Meteors are pieces of space
debris that enter the earths
atmosphere.
When the debris is in space
heading to earth it is called a
meteoroid.
Meteors
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When it is burning up in the
earths atmosphere it is a
meteor.
When it is on the ground it
is a meteorite.