Which Sentence from the section explains why finding the chemicals on Mars was important? A. Scientists also learned about the gas methane on Mars.

B. The gas might be stored in cold places scientists said

C. Inge Loss ten Kate is a scientist who studies life

D. The clues can tell scientists more about things that might have live on Mars

the answer is a) a shiprock was formed by igneous process

not only is it colder, it also becomes darker, less salty, and more dense.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

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