Download The inner planets

Class 6
Term 1
Inner Plants of Solar System
The solar system includes the Sun and all the objects that orbit around it due to its
gravity. This includes things such as planets, comets, asteroids, meteoroids and moons.
There are eight planets in the Solar System (4 inner planets and 4 outer planets). The
inner planets (also known as terrestrial planets) are smaller and made mostly of rock
and metal. The four inner planets of our solar system are
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Mercury
Venus
Earth
Mars
Mercury is the closest planet to the Sun. Its surface appears very similar
to Earth's Moon, but the planet has a much larger iron core and is therefore much
thicker; Mercury's composition is approximately 70% metallic and 30% silicate.
Venus is the second planet from the sun. It is one of the four inner planets. These
planets are Mercury, Venus, Earth and Mars. Venus is sometimes called the "Evening
Star" and the "Morning Star". It is very bright. You can see it at sunset and sunrise. It is
so bright it looks like a star, but it does not twinkle.
Earth is the third planet from the sun. Earth is often called the "Water Planet" because it
is the only planet in our solar system which has liquid water on its surface. About 70% of
the surface of Earth is covered by water!
Mars is the fourth planet from the sun. Mars spins very quickly compared to other
planets. It only takes Pakistan 24 hours to spin around its axis one time. Mars spins
around on its axis in 24 hours and 36 minutes. Mars is often called the "Red Planet"
because that is its color.
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