Unit 3 Standards and Thermal Energy Quiz

Particles are always moving.

• True

• False

Thermal energy always moves from :

• Warm object to cool object

• Object with low KE to object with high KE

• Cool object o warm object

• Object with high mass to object with low mass

Two flasks each contain water at 25 degrees Celsius. Which one has more heat energy?

• They have the same heat energy because they are the same temperature.

• The one on the right has more heat energy because it has less water.

• The one on the left has more heat energy because it has more water.

Temperature is a measure of an object's average :

• electro-static force

• heat

• density

• kinetic energy

Which of the following is true when particles gain thermal energy?

• Particles move more slowly.

• Particles move closer together.

• Particles stop moving.

• Particles move further apart.

What happens to the particles in a substance as heat/energy is added?

• They speed up

• They stay the same.

• They slow down

How do you increase the kinetic energy of molecules?

• Decrease the temp

• change the energy input

• increase the thermal energy

• expand the molecules and increase the density

Thermal energy always moves from areas of ______ heat to areas of ______ heat.

• low -- high

• high -- low

• high -- high

• low -- low

Rosa pours a cup of boiling water into a pot of room-temperature water. According to the second law of thermodynamics, what will occur?

• Thermal energy from the room-temperature water will continuously flow to the boiling water.

• Thermal energy from the room-temperature water will flow to the boiling water until all of the water in the pot is at a single temperature.

• Thermal energy from the boiling water will continuously flow to the room-temperature water.

• Thermal energy from the boiling water will flow to the room-temperature water until all of the water in the pot is at a single temperature.

What is collision theory?

• Molecules must collide in the correct orientation with enough energy to bond.

• Molecules need enough energy to collide and react.

• Atoms constantly collide and react.

• The minimum energy needed for atoms to react