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1. LAYERS OF THE EARTH AND ITS
ATMOSPHERE
BY:DANIEL CARAJAY

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3. CRUST:
MANTLE:
• The mantle is the mostly solid bulk of Earth's interior.
• The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust.
• The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84 percent of Earth's total
volume.
CORE:
• Earth's core is the very hot, very dense center of our planet.
• The ball-shaped core lies beneath the cool, brittle crust and the mostly solid mantle.
• The core is found about 2,900 kilometers (1,802 miles) below Earth's surface, and has a radius of about 3,485
kilometers (2,165 miles).
• The crust is the outermost shell of a terrestrial planet.
• Earth's crust is generally divided into older, thicker continental crust and younger, denser oceanic crust.
• The dynamic geology of Earth's crust is informed by plate tectonics.

5. TROPOSPHERE:
STRATOSPHERE:
• The stratosphere (strato- simply means "layer" or "level") lies above the earth's weather and mostly changes very
little.
• It contains the ozone layer, which shields us from the sun's ultraviolet radiation except where it's been harmed by
manmade chemicals.
MESOSPHERE:
• The mesosphere is a layer of Earth’s atmosphere.
• The mesosphere is directly above the stratosphere and below the thermosphere.
• It extends from about 50 to 85 km (31 to 53 miles) above our planet.
• Temperature decreases with height throughout the mesosphere.
• The troposphere is the lowest layer of Earth's atmosphere.
• Most of the mass (about 75-80%) of the atmosphere is in the troposphere.
• Most types of clouds are found in the troposphere, and almost all weather occurs within this layer.

6. THERMOSPHERE:
EXOSPHERE:
• The exosphere is the very edge of our atmosphere.
• This layer separates the rest of the atmosphere from outer space.
• It's about 6,200 miles (10,000 kilometers) thick.
• That's almost as wide as Earth itself. The exosphere is really, really big.
• The thermosphere is the second highest layer of Earth's atmosphere and extends from the mesopause (which
separates it from the mesosphere) at an altitude of approximately 260,000 ft up to the thermopause at an altitude
that ranges from 1,600,000 to 3,300,000 ft.

7. REFERENCES:
EARTH
https://www.google.com/search?q=layers+of+the+earth&oq=layers+of+the+earth&
aqs=chrome..69i57.5808j0j1&sourceid=chrome&ie=UTF-8
ATMOSPHERE
https://www.google.com/search?q=layers+of+the+atmosphere&oq=layers+of+the+
atmosphere&aqs=chrome..69i57.5928j0j1&sourceid=chrome&ie=UTF-8