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It's All About Energy

Across
The temperature at which a solid changes to a liquid.
An object that reduces the transfer of heat.
The transfer of heat by direct contact between solids.
The amount of matter in an object.
The temperature at which a liquid freezes.
The mass per unit volume of a substance
Down
The temperature at which a liquid boils.
The process of a substance in a liquid state changing to a gaseous state.
Transfer of heat in liquids and gases.
A small particle that is the building block of matter.
Transfer of heat in empty space without any particles.