What do all object emit?

Dark, matt surfaces are good ...?

What are shiny silver surfaces good for?

Does a object have to be hot or cold to increase the more infra-red radiation it emits?

What does infra-red radiation travel in?

What do we see infra-red radiation on?

What is evapouration

What is condensation?

What effect does evaporation have?

What is conduction?

How do particles transfer heat?

What is convection?

Why are metals good at conducting heat?

What happens when a fluid is heated?

Why does convection in fluids occur?

What is a u-value?

How can you tell by a u-value if a product is good at insulating?

What is the payback time?

What do solar panels do?