Inner planets are awesome

Hello I'm back.  In my last blog I talked a little bit about inner planets. Now I am going to tell you more about them. 

Another word for inner planets are the terrestrial planets. All of the inner planets have a crust mantle and a solid inner core.The inner planets are Mercury,Venus,Earth and Mars. All of the inner planets are made of solid rock. Each inner planet can have different sizes, atmospheres, and surface.

Mercury is the smallest planet in the solar system. It is also the fastest planet that orbits around the sun. Mercury has a core made of iron and nickel.  It's large core might have been formed by a collision with a large object during it's formation. There are smooth plains and solidified lava from eruptions long ago.  There is almost no erosion on the planet and this planet has no moon. Mercury has no atmosphere.  That means there is no wind that moves energy from place to place across the planet's surface.

Venus is the second planet to the sun. It is also the hottest planet. It is hotter than mercury. I bet you did not know that. Venus is hotter than mercury because of the increased amount of carbon dioxide in the atmosphere which locks the heat in side. Venus used to be like earth. It once had a magnetic field like us. When the magnetic field broke the sun rays hit venus making it the hottest planet.

Earth is the third planet from the sun. Unlike Mercury and Venus it has one moon. Earth's atmosphere absorbs much of the sun's radiation and protects the surface below. Earth is the only planet with water and life.  Earth's protective atmosphere, liquid water and the planet's moderate temperature range support a variety of life.  You might have thought that Neptune had water on it but that is gas. 

Mars is the fourth planet and it has 2 moons.  These moons might be asteroids that were captured by Mars gravity.  Mars is half the size of the earth.  Many space probes have visited Mars and images of Mars show features that might be made by water. The temperature on Mars range from about -125 degrees C at the poles to about 20 degrees C at the equator.  Winds on Mars creates dusts storms that lasts for months.  The reddish color of Mars is because it's soil contains iron oxide that is a compound in rust.  Olympus Mons is a volcano that is as wide as Arizona and 3 times as high as Mount Everest.

http://library.thinkquest.org/J001794/

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