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Weathering and Erosion CFA S6E5 d and e — 10 Questions
Armstrong, Kennedee

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Earth and Mars
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Earth and Mars
Scientists use their understanding of Earth processes to study other planets in the solar system. Earth and Mars have many similarities and differences. Both planets have surface features such as canyons, volcanoes, sand dunes, and craters. Both planets have been shaped by weathering and erosion. The winds on Mars can move across its surface at a speed of 10 to 20 miles per hour, with the highest speed being measured at 70 miles per hour. On Earth, there have been winds as strong as 200 miles per hour and more. The impacts of weathering and erosion have led to the shaping of some of Earth's most famous landmarks and the removal of some lesser-recognized features. Earth's atmosphere is made of mostly nitrogen and oxygen. Earth contains both liquid water and frozen water that is stored in the ice caps. The atmosphere of Mars is mostly composed of carbon dioxide. Although scientists have found evidence that Mars once had liquid water, it currently only contains a large amount of frozen water stored in the ice caps. The table compares some features of Earth and Mars.

Earth Mars
Canyons The Grand Canyon has high cliffs and water flowing along the bottom of the canyon. The Central Valles Marineris has high cliffs and is dry.
Erosion Erosion on Earth shows a smooth landscape. Wind Erosion on Mars shows a rough landscape.
Polar Caps Earth’s Polar Caps in the Arctic and Antarctic are big. The Antarctic Polar Cap is much larger than the Arctic Polar cap. Mars’s Polar Caps are small.
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Question 7.



What does Earth currently have that Mars does not that contributes to weathering and erosion?


ice


winds


flowing water


rock formations

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All Answers 1

Answered by GPT-5 mini AI
flowing water

Earth currently has liquid (flowing) water, which Mars does not; Mars only has frozen water in its polar caps.