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Copy of Compare and Contrast: Inner and Outer Planets

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Brittany Compton

on 9 March 2013

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Transcript of Copy of Compare and Contrast: Inner and Outer Planets

What`s the Difference between Inner and Outer Planets Inner Planets Outer Planets Inner Planets Inner Planets -They are Small
Earth is the largest of the Inner Planets, with a diameter of 12,756 km (7,926 miles). Mercury is the smallest with a diameter of 4,878 km (3,031 miles)
-Have solid surface and thin to no atmospheres. In theory, it would be possible to stand on each of the Inner Planets, although you would only survive on Earth.
Outer Planets -They are Huge!
Jupiter, the largest planet, has a diameter of 142,984 km (88,846 miles). Neptune is the smallest of the Outer Planets with a diameter of 49,532 km (30,779 miles)
-Balls of gas with no surface
Most of the Outer Planets are made of gas. It is likely that they have a much smaller solid or liquid center than the Inner Planets. It would be impossible to stand on any of the Outer Planets.

-Greater Density
The size and composition of the inner planets is caused by the density of the elements that make up the planets. The elements in the Inner Planets are more closely packed together, causing them to be smaller and more solid, meaning their more dense.
-Inner Plants orbit the Sun quickly
because they are quite close to the Sun. Mercury takes only 88 days to orbit the Sun. Mars takes 687 days.

-Smaller Density
Despite being larger, the elements that make up the Outer Planets are less densely packed together causing them to be quite light for their size.
-Orbit the Sun slowly
The Outer Planets orbit the Sun from millions of miles and have a much greater distance to cover to complete an orbit, so take much longer to do so. Jupiter takes almost 12 years to complete an orbit and Neptune takes over 164 years.

-Fewer Moons
Only Earth and Mars have moons orbiting them. One moon orbits Earth and two small moons orbit Mars.
-No rings
None of the Inner Planets have rings orbiting them.
Outer Planets - -Lots of Moons
All of the Outer Planets have many moons orbiting them. There are 63 moons known to orbit Jupiter, 60 orbiting Saturn, 27 orbiting Uranus and 13 orbiting Neptune.
-Rings
All of the Outer Planets have rings orbiting them. The rings are thin discs of dust and rocks that possibly were caused by other moons being broken up or not being completely formed while orbiting the planets. Saturn has the most visible ring system of any of the planets.
Inner Planets Outer Planets -Smaller Density
Despite being larger, the elements that make up the Outer Planets are less densely packed together causing them to be quite light for their size.
-Orbit the Sun slowly
The Outer Planets orbit the Sun from millions of miles and have a much greater distance to cover to complete an orbit, so they take much longer to do so. Jupiter takes almost 12 years to complete an orbit and Neptune takes over 164 years.

Outer Planets
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