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4 rocky planets
Mars, Earth, Venus and Mercury
4 gas planets
Uranus, Neptune, Saturn and Jupiter.
Why is there life on earth?
There is lots of water on earth and land on earth. There is also just the right temperature which makes it suitable for life.
History of Mars
Mars used to have an atmosphere, but over time solar wind caused it to disappear. Now, Mars' atmosphere is made up of mostly carbon dioxide, causing its current cold and dry climate.
All layers of the atmosphere (in order)
troposphere, ozone, stratosphere, mesosphere, thermosphere and exosphere
Where do airplanes fly?
Lower stratosphere or upper troposphere
In which layer is the ISS in? (International Space Station)
Thermosphere
What happens in the mesosphere?
Meteoroids burn up to create shooting stars, and noctilucent clouds form from water vapor.
Note 
Flashcard (31)