Water and Phase Changes Quiz

In which phase are molecules held together in a fixed (but vibrating) position?

• Gas

• Liquid

• Solid

• Plasma

What shape do water molecules form when frozen?

• Circle

• Square

• Hexagon

• Triangle

What is the term for the change from liquid to gas?

• Freezing

• Melting

• Boiling/vaporization

• Condensation

What is the melting point of ice?

• 0°C

• 50°C

• 100°C

• 150°C

What is the phase of matter where molecules are tightly packed?

• Gas

• Liquid

• Solid

• Plasma

What happens to the temperature of water during the freezing process?

• It increases

• It decreases

• It remains constant

• It fluctuates

What happens to the temperature of water during melting and boiling?

• It increases

• It decreases

• It remains constant

• It fluctuates

What is the purpose of the Add/remove heat energy slider in the Gizmo?

• To change the color of water

• To control the water temperature

• To change the volume of water

• To measure the water temperature

What is the effect of adding/removing heat energy set to 0 J/s?

• It increases the water temperature.

• It decreases the water temperature.

• It maintains the current temperature.

• It causes the water to freeze.

What happens to the molecular speed when the water temperature is set to 0 °C and heat is added?

• It decreases.

• It remains constant.

• It increases.

• It stops completely.