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Earth

Earth. Report: Astronomy Unit. The perfect planet…. Earth is the only planet in our solar system that can sustain life. Why?. Temperature: 61 degrees F Land 30% Water 97% saltwater, 1% fresh water, and 2% frozen water Size : 7,918 miles Atmosphere: 78% nitrogen, 21% oxygen. Composition.

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Earth

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  1. Earth Report: Astronomy Unit

  2. The perfect planet… Earth is the only planet in our solar system that can sustain life.

  3. Why? • Temperature: 61 degrees F • Land 30% • Water 97% saltwater, 1% fresh water, and 2% frozen water • Size : 7,918 miles • Atmosphere: 78% nitrogen, 21% oxygen

  4. Composition • The earth has 4 layers • Inner core (solid, made of iron and nickel) • Outer core (liquid, made of iron and nickel) • Mantle (made of rock, thickest layer) • Crust (thinnest layer, made mostly of rock)

  5. Moon Earth has one moon. It has many craters. Many space missions have been performed there- humans have even walked on the moon!

  6. Unique Features Earth is famous for its’ beautiful blue and green color. The blue comes from water- Earth is the only planet with lots of liquid water. The green color comes from the land- Earth has 7 continents (bodies of land). Earth also has a strong atmosphere. From space, you can see clouds covering Earth.

  7. Space exploration • Space missions are not performed on Earth because this is where we live! • Scientists from Earth are constantly exploring other planets with space shuttles, satellites, and probes.

  8. Summary • Earth is a beautiful place to live • It is the only planet that can sustain life • Earth is famous for it’s blue and green color and atmosphere • Scientists from Earth conduct space missions • Earth has 1 moon

  9. The End

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