The group in a experiment that is not exposed to the tested variable is called the group?

Imma go with control group?

Control group

Explanation:

Control group is the group in the experiment which is treated as a benchmark or standard in the experiment for the comparison with the experimental variable. It enhances the accuracy of the experiment. This group does not receive any experimental treatment that is this group is not exposed to the tested variable .  

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.

the titanic would be the correct answer