Energy and Matter Test

The measure of the average kinetic energy of the particles of a substance is its _____.

• temperature
• heat
• kinetic energy
• thermal energy

Which of the following statements about the particles in a material is true?

• The average kinetic energy of the particles increases as the temperature increases
• The average kinetic energy of the particles in a substance never changes
• The average kinetic energy of the particles decreases as the temperature increases.
• There is no relationship between kinetic energy and temperature.

Kinetic energy is

• stored energy
• the energy of motion

When a substance is cooled it usually expands.

• True
• False

When a pot of water is put on a stove, the water at the surface gets hot primarily by ____.

• radiation
• conduction
• convection

You grab a bottle of water out of the refrigerator. Your hand gets cold because of which of the following?

• radiation
• conduction
• convection

Compared to water, most metals have low specific heats.

• True
• False

Most materials ____ when they are heated.

• contract
• expand

At which temperature are the particles in a pencil moving the fastest?

• 50°C
• 40°C
• they are the same

Particles move from areas of low to high concentration.

• True
• False