Im an experiment , the group that is exposed to the variable to be tested is called the ?

The correct answer is the experimental group.  

A group in an experiment, which receives the variable being tested is known as an experimental group. One variable is being examined at a time. The experimental group is compared with a control group that does not get the test variable. In this manner, experimental groups are used to determine the answers in an experiment.  

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

answerspecific gravity;