Do Now 1: Temperature and Heat Review

Alex placed a small beaker of cold water on a hot plate and heated it for 10 minutes. He took the temperature of the water several times during those 10 minutes and recorded his data. Alex claims that the graph below shows the relationship between temperature and the time when the water is heated. Which statement best explains why the temperature leveled off in section 2 of the graph?

• The water reached the boiling point, so the temperature no longer increased.

• Cold water heats faster than warm water, so once the cold water was room temperature, it took more than 10 minutes to make it hot.

• Alex turned off the hot plate so the water did not get any warmer.

• An experiment error caused the graph to level off, because the temperature should keep increasing over time.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

During which of the following processes is there a decrease in the heat content of the form of water indicated?

• Snow as it melts on a mountainside

• Ice melting to form a lake

• Water evaporates from a pond

• Condensation forming water droplets that fall to the ground

Tags

NGSS.MS-PS1-4

If enough heat is removed from a container of water, what will happen to the water?

• It will begin to boil.

• It will become a solid.

• It will turn into a gas.

• It will increase in weight.

Tags

NGSS.MS-PS1-4

Delilah put a container of water in the freezer and left it overnight. The next morning she saw that the water in the container had changed to ice. Which of the following statements best explains why the water changed to ice?

• The water gained energy.

• The water absorbed the cold air.

• Mass was released from the water.

• Heat was removed from the water.

Tags

NGSS.MS-PS1-4

A student is holding a cold piece of metal in her hand. While she is holding the piece of metal, her hand gets colder. Does the piece of metal get warmer? Why or why not?

• Yes, the piece of metal will get warmer because some thermal energy is transferred from the student’s hand to the metal.

• Yes, the piece of metal will get warmer because some thermal energy is transferred from the metal to the student’s hand.

• No, the piece of metal will stay at the same temperature because thermal energy is not transferred between the student’s hand and the metal.

• No, the piece of metal will stay at the same temperature because an equal amount of thermal energy is exchanged between the student’s hand and the metal.

Tags

NGSS.MS-PS1-4

The temperature of a clay ball is 50°F and the temperature of the water in a bucket is 80°F. A student places the clay ball into the bucket of water. Which of the following describes how thermal energy is transferred between the ball and the water?

• No thermal energy would be transferred between the ball and the water, so the ball will stay at 50°F and the water will stay at 80°F.

• Thermal energy is transferred from the water to the ball until they are both at the same temperature

• Thermal energy is transferred from the ball to the water until they are both at the same temperature.

• Thermal energy is transferred from the water to the ball until the ball is at 80°F and the water is at 50°F.

Tags

NGSS.MS-PS1-4

The diagram represents a laboratory setup used to study heat transfer. Two covered, insulated cups, A and B, are connected with an aluminum bar. Each cup is individually labeled as A and B. If the temperature of the water in cup A continues to decrease as shown on the graph, what will the approximate temperature of the water in cup A be at the end of 25 minutes?

• 30

• 85

• 78

• 25

Tags

NGSS.MS-PS1-4

The following diagram shows water in contact with an ice cube and warmer air. Which way will energy flow?

• from the air to the water

• from the ice cube to the water

• from the ice cube to the air

• from the water to the air

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4