Thermal Energy Unit Test

Front

Which table correctly identifies an observation and inference from the activity?

Back

Front

A student selects three identical Styrofoam cups (1, 2, and 3), paints one white and one black, and covers the outside of the third with aluminum foil, as shown. The student fills each cup with an equal volume of water at room temperature and places the cups in sunlight. After three hours, the student observes that the water in cup 3 is the coolest. What correctly explains the student’s observation?

Back

The aluminum foil reflects the light back toward the atmosphere.

Front

A student wants to determine if the color of a cup will affect the temperature of the water contained in the cup. The student selects three different-colored cups, places 200 mL of water in each cup, and places all three cups in the Sun for 10 minutes. What tool should the student use to check which cup absorbed the most heat after 10 minutes?

Back

thermometer

Front

A metal spoon is used to stir hot chocolate in a ceramic mug. Which statement describes the direction of heat transfer that occurs?

Back

from the hot chocolate to the spoon

Front

Which statement correctly categorizes Ryan’s jacket as a conductor or an insulator?

Back

Ryan’s jacket is an insulator since it helps to prevent heat from flowing from the thin layer of air that is trapped close to Ryan’s body to the external environment.

Front

After several minutes, the student notices that both cubes are the same temperatures. What does the student demonstrate using the model?

Back

Conduction is the transfer of heat from a hotter object to a colder object.

Front

If the door between the rooms is opened, and the temperatures are measured after one hour, what is the best prediction of the temperatures for Rooms X and Y?

Back

Room X = 24°C; Room Y = 18°C

Front

Metal cooking pots usually have plastic or wooden handles. Which property of metals best explains why the metal pots have handles that are made of a different substance?

Back

conductivity

Front

A student wants to know how well four different kinds of cups can keep water hot. He labels four different cups P, Q, R, and S. The student then pours 10 mL of 45°C water into each cup and records the temperature of the water in each cup every 5 minutes for 20 minutes. What can be concluded from the investigation?

Back

Cup S is a better insulator of heat than Cup P.

Front

An engineer conducts an experiment to study which materials prevent heat transfer. The engineer fills four plastic cups each with 50 mL of water at 55°C and places a thermometer in each cup. The engineer wraps one of four different materials (1, 2, 3, and 4) around each cup and graphs the temperature of the water in each cup every 3 minutes. Which material minimizes heat transfer?

Back

material 2