The atmosphere is a mixture of different gases, dust particles, and water vapor. At the Earth’s surface, the gases are mostly nitrogen (78%) and oxygen (21%). The remaining 1% is a mixture of argon, carbon dioxide, and small amounts of other gases.(2 points)
Responses
True
True
False
False
Question 2
The atmosphere is divided into five layers. These five layers are the troposphere, the stratosphere, the mesosphere, the thermosphere, and the exosphere. Each layer has its own properties. There are no definite boundaries between these layers. One gradually blends into the next as the altitude increases.(2 points)
Responses
True
True
False
False
Question 3
lithosphere – all the living things on Earth
(2 points)
Responses
True
True
False
False
Question 4
hydrosphere – all the water found on, under or above Earth’s surface
(2 points)
Responses
True
True
False
False
Question 5
exosphere – the outer layer of the atmosphere that extends from 700 km to outer space
(2 points)
Responses
True
True
False
False
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5 answers
1. True
2. True
3. False
4. True
5. True
1. True
2. True
3. False
4. True
5. False