Things are made of ___________.

When a thing gets hotter, its molecules are moving faster and they have _____

When a thing gets colder, its molecules are moving slower and they have _____

_________ is a measure of the average speed of the molecules of a thing.

When two things are in contact, their molecules collide, and kinetic energy transfers from the __________-moving molecules to the __________-moving molecules

The energy that an object has because it is moving is called ____________ energy.

A set of interacting pars that form a complex whole is called a _____________.

Joe puts a shoe onto ice. After a while the temperature of the shoe decreases. What happens to the molecules of the shoe when the temperature of the shoe decreases?

When two objects of a different temperature are in contact for a long period of time, the energy is transferred until the object reach ____________.

A system is identified as ________ when it stays mostly the same over time.

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