Thermal Energy Unit

_________________________ is a measure of the average kinetic energy of the particles in a material.

• thermal
• friction
• temperature
• expansion

The liquid in a thermometer ______________ as the temperature increases.

• expands
• disappears
• freezes
• explodes

The most common temperature scale used in the world where water freezes at 0 degrees and boils at 100 degrees is called the __________________ scale.

• Celsius
• Fahrenheit
• Pound
• Kelvin

The movement of thermal energy from an object at a higher temperature to an object at a lower temperature is called ____________.

• thermal
• expansion
• temperature
• heat

Heat always moves from ____________ objects to ______________ objects.

• cooler, warmer
• warmer, cooler
• faster, slower
• slower, faster

Heat transfer stops when the objects have the same temperature.

• True
• False

An increase in the volume of a substance when the temperature increases is called ___________________________________.

• kinetic energy
• thermal expansion
• temperature
• heat

Thermal energy keeps moving away from warmer objects to cooler objects until both are the same temperature.

• True
• False

When molecules slow down their movement, the ________________

• space between them increases making the substance contract.

• space between them increases making the substance expand.

• space between them decreases making the substance contract.

• space between them decreases making the substance expand.

When matter cools, its molecules ________________

• speed up

• move slower

• become more disorganized

• collect the coldness from its surroundings.