Water and Changes of State

A beaker of ice was heated over a period of time. The changes in temperature are shown in the graph.

Which of the following correctly matches the processes to the parts of the graph?

• Melting: AB Boiling: BC

• Melting: AB Boiling: CD

• Melting: BC Boiling: AB

• Melting: BC Boiling: CD

Jed filled a beaker with water and left it in a room at 27^oC. After a few minutes, Jed observed water droplets on the outer surface of the beaker.

Which of the following is most likely the temperature of the water in the beaker?

• 10^oC

• 37^oC

• 50^oC

• 100^oC

Ameera wants to conduct an experiment to find out if ice melts faster when more heat is applied to it. Which of the following variable(s) should she keep the same?

A . Amount of ice used

B. Amount of heat applied

C. Shape of container used

D. Location at which the experiment is conducted

• B only

• A and C only

• A, C and D only

• A, B, C and D

Which of the following statements describe the similarities between melting of ice and the freezing of water?

A. Heat is gained in both processes.

B. Both processes take place at 0^oC.

C. Both processes involve a change of state.

• A and B only

• A and C only

• B and C only

• A, B and C

Water droplets form on the outside of iced tea on a hot day. What process causes the water to form?

• Condensation

• Evaporation

• Melting

• Freezing

During which of the following processes does water gain heat?

A. Freezing

B. Condensation

C. Boiling

D. Evaporation

• A and B only

• A and D only

• B and C only

• C and D only

What is the process called when liquid water changes to solid?

• freezing

• melting

• condensation

• evaporation

What is the process called when water changes to water vapour?

• evaporation

• condensation

• freezing

• boiling

At what temperature does ice melt?

• 0 ^oC

• 100 ^oC

• 1^oC

• 30^oC

At what temperature does water freeze?

• 0 ^oC

• 100 ^oC

• 1^oC

• 30^oC