Read this excerpt from "Mars: Landscape of the Red Planet."

In addition to its volcanic landscape, Mars also has an amazing system of canyons known as the Valles Marineris. Scientist have ruled out water as the reason for the formation of these canyons. Instead, they theorize that the canyons were formed from the splitting of the Martian crust due to the cooling of the planet. Valles Marineris runs 2,500 miles long at a depth of 4 miles, dwarfing the Grand Canyon back on Earth, which is only 500 miles long and 1 mile deep. Canyons on Mars appear to have been formed by the splitting of the Martian crust. However, canyons on Earth were most likely formed by A.the impact of asteroids causing damage to the surface B.water flowing through rivers over long periods of time C.earthquakes causing parts of Earth’s crust to rise up. D.the rising of hot magma from deep inside Earth’s core.

This is because water breaks down stuff that is slightly fragile if you have enough of it. It can easily break down stuff like rocks. That likely caused a lot of canyons and craters on the Earths surface. Plus, it couldn't be the first option due to most asteroids not being able to make it onto Earths surface. (At least not to were there big enough to cause canyons). It's not the option 3 because earthquakes occur on Earths surface and does not affect Earths core. And finally, its not the final option, because there is no possible way for magma deep in Earths core to make its way to the surface, thanks to gravity. Therefore, the only option it could possibly be is the second option, which is your answer.

gauravsingh23VT gauravsingh23VT · Answer 2 · 2022-07-30T11:42:44+02:00

Canyons on Earth were most likely formed of water flowing through rivers over long periods of time. Hence, option B is correct.

Why water flowing through rivers over long periods of time?

Given enough water, even marginally fragile materials can be destroyed. Rocks are easily broken down by it. There are probably many canyons and craters on the Earth's surface as a result of this.

Additionally, it couldn't be the first choice because the majority of asteroids can't make it to Earth's surface. Because earthquakes only affect the Earth's surface and not the core, The fact that magma located deep within the Earth's core cannot travel to the surface due to gravity.

Thus, option B is correct.

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