The Atmosphere

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Exosphere- The outermost region of a planet's atmosphere.
Ionosphere- The layer of the earth's atmosphere that contains a high concentration of ions and free electrons and is able to reflect radio waves. It lies above the mesosphere and extends from about 50 to 600 miles (80 to 1,000 km) above the earth's surface. Thermosphere- The region of the atmosphere above the mesosphere and below the height at which the atmosphere ceases to have the properties of a continuous medium. The thermosphere is characterized throughout by an increase in temperature with height. Mesosphere- The region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.

Stratosphere- The layer of the earth's atmosphere above the troposphere, extending to about 50 km above the earth's surface (the lower boundary of the mesosphere).

Troposphere- The lowest region of the atmosphere, extending from the earth's surface to a height of about 6–10 km (the lower boundary of the stratosphere).

Cirrocumulus- Cloud forming a broken layer of small fleecy clouds at high altitude, usually 16,500–45,000 feet (5–13 km), typically with a rippled or granulated appearance (as in a mackerel sky).

Cirrus- Cloud forming wispy filamentous tufted streaks (“mare's tails”) at high altitude, usually 16,500–45,000 feet (5–13 km).

Altostratus- Cloud forming a continuous uniform layer that resembles stratus but occurs at medium altitude, usually 6,500–23,000 feet (2–7 km). Cirrostratus- Cloud forming a thin, more or less uniform, semi translucent layer at high altitude, usually 16,500–45,000 feet (5–13 km).

Stratus- Cloud forming a continuous horizontal gray sheet, often with rain or snow.

Stratocumulus- Cloud forming a low layer of clumped or broken gray masses.

Nimbostratus- A type of cloud forming a thick uniform gray layer at low altitude, from which rain or snow often falls (without any lightning or thunder)....
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