composition of earth what makes up earth’s sphere’s?
TRANSCRIPT
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Composition of Earth
What makes up Earth’s Sphere’s?
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Why is Earth Unique?
• 3rd planet from the sun-perfect for supporting life-biosphere
• Is covered by a blanket of gases-atmosphere
• Is covered by water- hydrosphere
• Has polar ice caps-cryosphere
• Solid ground-geosphere (lithosphere)
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The Atmosphere
• Thin blanket of gases that surround the earth
• Consists of layers divided according to temperature
• Consists of water vapor,oxygen, nitrogen, argon and other gases
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Structure of Earth’s Atmosphere
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Earth’s Atmosphere according to temperature variations
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More on the Atmosphere
• The study of the condition of the atmosphere is known as meterology
• Gases thin out with altitude
• Ozone or O3 is found in the stratosphere
• Ozone filters harmful ultraviolet rays from the sun
• The hole in the ozone found over polar ice caps is monitored closely by scientists
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The Hydrosphere
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Hydrosphere
• All the water that covers the earth• Consists of liquid water, dissolved salts,
including sodium chloride and many others.• 3% fresh, 97% oceanic• Two common resources from ocean water are
table salt, and magnesium• Study of oceans is called oceanography• Sources of salt: weathered rock, volcanoes, and
decaying marine organisms• Salinity, temperature, light intensity of ocean
varies with depth
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The Geosphere
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Geosphere
• Consists of solid rock
• Is constantly changing
• Wears down by weathering and erosion
• Builds up by crustal activity, volcanic eruptions, mountain building etc
• Compound that form the rock come from within the earth in magma (igneous rock)
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The Crysosphere
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The Cryosphere
• All the ice or frozen waters
• Moves
• Glacier
• Found at polar ice caps and high altitudes