Get started!

Challenge
Answer 7 out of 9 questions correctly.

People often think of temperature as how hot or cold something is. But what exactly is temperature?

This rubber ball contains many small, moving particles.

Temperature is a measure of kinetic energy. Every substance is made up of particles. The temperature of a substance is related to the kinetic energies of these particles. If a substance is hot, its particles tend to have a large amount of kinetic energy.

The particles in a substance have kinetic energy because they are moving. The particles are constantly in motion, even if the substance does not appear to be moving.

Select all of the statements that are true about the rubber ball shown above.