If hot liquids/gases will expand and RISE, what do you think a COOLER liquid/gas will do?

A sink
B stays the same
C also rise

B stays the same

The behavior of cooler liquids or gases depends on several factors. In general, if we consider a liquid or gas at a constant pressure and decrease its temperature, the molecules within it will slow down, and the average distance between molecules will decrease. This leads to a decrease in volume, resulting in contraction or shrinking of the substance.

To answer your specific question, if we have a cooler liquid or gas, it would generally contract or decrease in volume. This means that it would not rise or expand like hot liquids or gases do.

In terms of the options you provided:
A) A sink: This option suggests that cooler liquids or gases will sink. That is not necessarily true. While it is possible for cooler substances to become denser and settle towards the bottom, it doesn't always mean they will sink. The behavior can vary depending on factors like density and the presence of other substances.
B) Stays the same: This option is more accurate. Cooler liquids or gases tend to maintain their volume, but they contract and become denser.
C) Also rise: This option is incorrect. Cooler liquids or gases generally do not rise or expand.

To summarize, the correct answer is B: Cooler liquids or gases tend to maintain their volume, but they contract and become denser.

A cooler liquid or gas will typically sink.