States of Matter and Energy Changes

What happens to molecules when energy is added?

• Molecules lose energy and become more stable.
• Molecules become heavier and sink to the bottom.
• Molecules move faster and may change state or react more readily.
• Molecules break apart into smaller fragments.

Fill in the blank: When energy is removed, the temperature ________.

• When energy is removed, the temperature decreases.

• When energy is removed, the temperature increases.

• When energy is removed, the temperature remains constant.

• When energy is removed, the temperature fluctuates.

What happens to molecules when energy is removed?

• Molecules speed up and become more stable.
• Molecules slow down and may change state.
• Molecules remain unchanged regardless of energy.
• Molecules break apart into smaller particles.

If a solid turns into a liquid then,

• The molecules start to move around each other.

• The molecules start to move closer together.

• The movement of the molecules stays the same..

• The molecules get lost.

When a gas changes into a liquid, then

• Energy was put in

• Energy was taken out

• Energy was not changed.

• Energy was put in , then taken out.

The physical change of a gas to a liquid.

• Condensation

• Insulator

• Conductor

• Solution

S-L-G=

• Energy in

• Energy out

• Energy dissapeared

• Energy stayed the same.

7. All phase changes (changing states) requires energy to be added or taken away.

• True
• False

When a a gas turns into a liquid,

• The gas freezes into a solid.
• The gas expands into a vapor.
• The gas evaporates into a solid.
• The gas condenses into a liquid.

Fill in the blank: When energy is added, the temperature ________.

• When energy is added, the temperature increases.

• When energy is added, the temperature decreases.

• When energy is added, the temperature remains the same.

• When energy is added, the temperature fluctuates unpredictably.