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The Earth

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    Solar System
  •   Study   Slideshow
  • What does the Earth orbit?
    The Sun
  •  10
  • Is the water on Earth liquid or frozen?
    Liquid
  •  10
  • What would happen if the Earth were closer to the Sun?
    The water would heat up and turn into gas
  •  15
  • What would happen if the Earth were smaller?
    All the gases we need to breathe would escape to space
  •  15
  • What kind of planet is Earth?
    Rocky or Terrestrial
  •  15
  • What are the gases in the air of Earth’s atmosphere?
    Nitrogen (78%) Oxygen (21%) Water vapor,CO2, Ozone, and other gases (1%)
  •  15
  • What’s the air near Earth’s surface called? How far is it?
    Troposphere - 10 km
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  • Where is the ozone layer?
    In the stratosphere
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  • What is the percentage of land on Earth?
    29%
  •  10
  • What is the percentage of water on Earth?
    71%
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  • What started to give off oxygen?
    Algea
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  • How do algae, or plants in general give off oxygen?
    By photosynthesis
  •  20
  • What do plants use to make their food?
    Sunlight, carbon dioxide and water
  •  15