Question

Litmus-type test strips are used to test coolant for freeze protection and

Answer 1

Litmus-type test strips are used to test coolant for freeze protection and

A. density.

B. contraction.

C. expansion.

D. condition.

Answer 2

I think it's letter B. When an object freezes, such as ice, their molecules will be contracted due to the molecules that looses kinetic energy. When there is a lose of kinetic energy, then the temperature is cold. So the answer is contraction because it causes the molecules to freeze.