Question

Okay, I have three more questions.

1.) When a gas or liquid is heated, it warms, expands, and blank because it is blank dense.
2.) When a gas or liquid is cooled, it becomes blank dense.
3.) As the warm gases and liquids rise and cool gases and liquids sinks, it creates a blank.

Answer 1

When a liquid or a gas is heated, it expands and becomes less dense, so it rises, while the cooler, denser liquid or gas sinks. (Not sure if this helps but this is what I hit)

Answer 2

1. Less
2. More
3. Convection current
I am unsure if 3 is correct