The Earth´s Atmosphere is made up of a mixture of gases, mostly ………………………….. and ……………………, that wrap around the earth like a blanket. The air of our planet is ……………….% Nitrogen and just under ………….% Oxygen.
Without the atmosphere we would not be able to ………………………….here. Those gases protect us by blocking out dangerous rays from the ………………………. And making Earth a perfect habitat for ………………………….. and ……………………………….
The Earth´s atmosphere has ………………………….layers, Troposphere, Stratosphere, Mesosphere, …………………………….. and Exosphere. Atmospheric gases become ……………………… as you go higher.
The Troposphere is the ………………………..layer of the atmosphere. It begins at the surface and extends to between ……………… km, (23 000 feet) at the Poles and …………………… km, (60 000 feet) at the equator. This part of the atmosphere is the most …………………… As you climb higher in this layer the temperature drops from 17 degrees Celsius (DC) to ……………………… DC. The Troposphere is known as the ………………………. Layer since snow, wind and ……………….. Stick to this layer.
The stratosphere starts just above the ………………………… and extends 50 km (31 miles) high. This part of the atmosphere is ……………………… and less dense. The temperature here increases up to -3 DC, due to the ……………………………. of ultraviolet radiation. The O zone layer is in this layer. 99% of …………….. is located in the Troposphere and Stratosphere.
In the Mesosphere the temperature falls to as low as ………………………. DC. This is also where most ………………………… burn up when they enter the atmosphere.
Thermosphere is know as the ……………………… atmosphere. The Thermosphere also includes the………………………., a region which is filled with many charged particles.
The Exosphere starts 500 km above the ………………………… and is the highest layer. It reaches until it merges with ………………
Live animals weather Sun Nitrogen plants absorption
- 52 Dense meteors
Rain 21 Oxygen dry Earth Troposphere 17 lowest
7 thinner 79 -93 Ionosphere upper
5 SPACE air
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