Understanding Phase Changes and Energy

What is the process called when a solid changes directly into a gas without passing through the liquid state?

• Condensation

• Sublimation

• Evaporation

• Freezing

Tags

NGSS.MS-PS1-4

Which of the following best describes the motion of particles in a gas compared to a solid?

• Particles in a gas move slower and are closer together than in a solid.

• Particles in a gas move faster and are farther apart than in a solid.

• Particles in a gas move at the same speed and are the same distance apart as in a solid.

• Particles in a gas move slower and are farther apart than in a solid.

Tags

NGSS.MS-PS1-4

If you add thermal energy to ice, what change in state is most likely to occur?

• The ice will sublimate into gas.

• The ice will melt into liquid water.

• The ice will condense into a solid.

• The ice will freeze further.

Tags

NGSS.MS-PS1-4

Explain how the addition of thermal energy affects the particle motion in a liquid.

• Particles move slower and become more organized.

• Particles move faster and become less organized.

• Particles stop moving completely.

• Particles move at a constant speed.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which phase change diagram correctly represents the transition from solid to liquid to gas as thermal energy is added?

• A diagram showing a straight line with no changes.

• A diagram showing plateaus at melting and boiling points.

• A diagram showing a downward slope.

• A diagram showing random spikes.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens to the temperature of a substance during a phase change, such as melting or boiling?

• The temperature increases.

• The temperature decreases.

• The temperature remains constant.

• The temperature fluctuates randomly.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Describe the changes in particle motion and energy when a gas condenses into a liquid.

• Particles gain energy and move faster.

• Particles lose energy and move slower.

• Particles gain energy and move slower.

• Particles lose energy and move faster.

Tags

NGSS.MS-PS1-4

Predict what will happen to the state of matter if thermal energy is continuously removed from a gas.

• The gas will become a solid directly.

• The gas will become a liquid and then a solid.

• The gas will remain a gas.

• The gas will become a plasma.

Tags

NGSS.MS-PS1-4

Which state of matter has a definite volume but no definite shape?

• Solid

• Liquid

• Gas

• Plasma

How does the removal of thermal energy affect the state of a pure substance?

• It causes the substance to expand and change to a gas.

• It causes the substance to contract and change to a solid.

• It causes the substance to remain unchanged.

• It causes the substance to become a plasma.

Tags

NGSS.MS-PS1-4