Suppose you want to find out if using cell phones while driving a car affects the likelihood of having an accident. cell phone use would be the .
a. independent
b. control
c. extraneous
d. dependent

Independent variable

Explanation:

The independent variable is those variables that can be manipulated by an experimenter. It is opposite to the dependent variable. The effect can be seen through the manipulation in the independent variable on the dependent variable.

So that here in the above context if you want to find out that using cells during driving cause accident. The cell phone will be here as an independent variable. Because when cell phone manipulated it will show the effect of the accident. It depends on the cause and effect relationship.  

according to hess's theory, when the magma cooled, it would expand and push the tectonic plates apart. it would push the north and south america plates to the west and eurasia and africa ones to the east. the atlantic ocean would get wider but the coastlines of the masses would stay the same.

harry hammond hess was a geologist and a united states navy officer in the second world war. he is considered to be one of the founding fathers of the theory of plate tectonics. he is known for his theories on sea floor spreading, stating that the movement of the continents was the result of see floor spreading. the continents are attached to the plates and do not move separately. the plates themselves shift and change shape, carrying the continents along.

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