How does a liquid change as it is moved from one container to another

As you move from right to left on the periodic table the atomic radius fill in the blank

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction

Ajar contains a certain substance. which observation would show that the substance must be either a solid or a liquid?