What is transfer of energy along electromagnetic waves?

When a wave comes into contact with an object, energy is transferred to the object in the form of heat.

What is a campfire because it emits light waves?

What is the only category that can travel through empty space?

Gas or liquid medium is heated, it warm, expands, and rises because it's less dense.

What is water boiling in a pan, because water rises and falls?

What is the transfer of heat by movement through a medium, air or liquid?

When gas or liquid medium cools, becomes denser and falls.

What is metals, because if you leave a metal spoon in hot substance, spoon becomes very hot?

What is transfer of heat between objects that are in direct contact with each other?

Heat can make atoms vibrate, or set electrons in motion

What is a light bulb, because it emits light which transfers heat by this?

What is the primary method of heat transfer through liquids and gasses?

Works well with solids because atoms are close together

What is hot air balloon, because when heated the balloon rises?