Select all of the statements that are true. 1. The average kinetic energy of the particles in a substance determines the

substance's temperature.

2. If the particles in two pure substances have the same average speed, the

substances can have different temperatures.

3. When two substances have the same temperature, all of the particles in

both substances are moving at the same speed.

4. How fast a substance's particles are moving determines how hot or cold

the substance is.