To be able to compare the results to a sample without any of the independent variable added.
Answer: It translated ''Nobar story summary'' for me
Explanation:...
I can’t really see the questions
Answer:
The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth's mantle and fit snugly against one another. The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other
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