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Section 2.1. Earth Facts Average Distance from the Sun: 149,597,890 km Travels through space at 107,229 km/h The earth isn't perfectly round, it is slightly.

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Presentation on theme: "Section 2.1. Earth Facts Average Distance from the Sun: 149,597,890 km Travels through space at 107,229 km/h The earth isn't perfectly round, it is slightly."— Presentation transcript:

1 Section 2.1

2 Earth Facts Average Distance from the Sun: 149,597,890 km Travels through space at 107,229 km/h The earth isn't perfectly round, it is slightly fattened at the north and south poles. Scientists have the dated the Earth as being between 4 and 5 billion years old! Earth is mostly iron, oxygen and silicon 70% of the Earth's surface is covered in water The Earth's atmosphere extends out to 10,000 km

3 The Atmosphere Layers of gases that surround Earth Made up of 78% nitrogen, 21% oxygen and <1% argon, water vapour, carbon dioxide and other gases Acts like a blanket and moderates surface temperatures. Blocks solar radiation (UV light) Made up of the troposphere, stratosphere and mesosphere.

4 The Lithosphere Earth’s outer layer, the rocky shell of Earth The mountains, ocean floors and rest of Earth’s solid landscape. Ranges from 50 to 150 km in thickness

5 The Hydrosphere Made up of all the water on Earth: Solid - glaciers Liquid – lakes, oceans, etc and groundwater Gas – clouds, water vapour 97% of Earth’s water is contained in the oceans.

6 The Biosphere The zone around Earth where life can exist Most can be found on land and in water Some micro-organisms can live several kms below the earth’s surface Can have artificial biospheres


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