Question

convection occurs in liquids and gases. what do we call these two types of matter? water fluids plasma

Explanation:

Convection is a mode of heat transfer that occurs in substances which can flow. Liquids and gases have the ability to flow, and the general term for substances that can flow is "fluids". Water is a specific liquid, not the general term for both liquids and gases. Plasma is a different state of matter (the fourth state, after solid, liquid, gas) and is not related to the description of liquids and gases in the context of convection.

Answer:

fluids