The Inner Planets

  This blog is on the inner planets. I will blog about what do the inner planets have in common, what hind of atmospheres they have, why Venus is hotter than Mercury and why life exists on Earth, but not on any other planet.

  The inner planets are similar because they all have rocky surfaces. They are sometimes called the terrestrial planets because of their rocky surfaces. They are all made of rock and metal. The planets have different sizes and atmospheres.

  Next, I am blogging about the inner planets atmospheres. Mercury has no atmosphere what-so-ever. Venus has an atmosphere made 97% of carbon dioxide. The gravitational pull on Venus is almost 100 times stronger than Earth. If someone stood on Venus they would probably be crushed in a few minutes. Earth's  atmosphere has multiple types of gases and a small amount of water vapor. Earth's location in the solar system makes water able to exist. Mars' atmosphere is made up of 95% carbon

dioxide and is a lot thinner than Earth's. Mars' temperatures can range from about 20°C  to -125°C.







  Now time to talk about the next topic. Venus is hotter than mercury because of its atmosphere. You might say why isn't mercury hotter because of its atmosphere, well guess what it does not even have an atmosphere. Venus has an increased amount of carbon dioxide in it's atmosphere, so it has the green house effect. The green house effect is where the atmosphere keeps the heat from the sun in.

 There is life on Earth because Earth is AWESOME. Earth is the only planet that we know of right now that is sustainable for life. The reason life exists on Earth is because the atmosphere, the moderate temperature, there is water and the magnetic field. The Earth's crust is constantly being formed. Since Earth has the greenhouse effect it keeps the temperature livable.