It is the hotness or coldness of air or object.

It is a substance made by mixing other substances together. It is a product of the random distribution of one substance through another without a chemical reaction.

A kind of mixture that the resulting mixture looks the same throughout and cannot be distinguished from each other. 

A kind of mixture that does not have a uniform composition and can still be recognized or distinguished. The materials in the mixtures do not change. Their sizes, shapes, and color are the same after mixing. 

When the temperature is high it means that it is ______________.

When the temperature is low, it means it is ____________.