Earth’s atmosphere is a mixture of nitrogen (79%), oxygen (20%), and a small fraction of carbon dioxide, water vapours and other gases. This makes the existence of life possible on Earth. However, the atmospheres on Venus and Mars mainly consist of carbon dioxide. The amount of carbon dioxide on these planets can range from 95% to 97%. This may be the reason no life exists on these planets.
The atmosphere of Venus is about 96 per cent carbon dioxide, with surface temperatures around 737 K (464 °C, or 867 °F).
Venus itself rotates only once every 243 Earth days.
Mars, in contrast, has a thin atmosphere composed of about 95 per cent carbon dioxide, with the remainder being mostly diatomic nitrogen.
Answer:
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Answer:
the crust because all of the cores are inside the earth towards the middle but the crust is the very earth we walk
Explanation:
<span>True. Contour lines are found on maps to determine equal elevation of connecting points. When a person walks along contour lines he neither gains nor loses elevation.
False. Relief does not refer to the height of an object above sea level. Mean Sea level determines the height of an object above sea level. <span>
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