Thermal Energy

Which statement describes the reason why an ice cube melts when set out in a warm

room?

• Heat from the room is absorbed by the ice cube.

• The ice cube molecules move more slowly.

• One side of the ice cube is colder than the other.

• Heat from the ice cube moves into the air.

Tags

NGSS.MS-PS1-4

A hot air balloon will lie flat until a heat source is initiated. Once enough heat is

produced the balloon begins to inflate. What process is responsible for a hot air

balloon’s inflation?

• Thermal energy will cause hydrogen in the air to change into helium, which

  causes the balloon to inflate.

• Thermal energy from the heat source will heat the fabric of the balloon,

  which causes the balloon to inflate.

• Thermal energy will move from the surrounding air to the heat source

  which causes air to sink into the balloon, which causes the balloon to

  inflate.

• Thermal energy will move from the heat source to surrounding cooler air

  which causes the air to rise until uniform temperature has been reached,

  which causes the balloon to inflate.

Tags

NGSS.MS-PS1-4

During the daytime there is a breeze that comes off the ocean and onto the land. This

is caused by the uneven heating of the earth’s surface. This can be seen in the image

below.

• Convection

• Conduction

• Radiation

• Specific

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

The BEST example of heat transfer by convection is when

• sunlight warms soil

• a ceiling fan blows air

• flames heat up a pan

• heat rises in a chimney

A student is mixing a cup of hot chocolate with a spoon. How is the heat transferred

between the hot chocolate and the part of the spoon that is in the hot chocolate?

• Conduction transfers energy from the spoon to the hot chocolate.

• Conduction transfers energy from the hot chocolate to the spoon.

• Convection transfers energy from the spoon to the hot chocolate.

• Convection transfers energy from the hot chocolate to the spoon.

Eight students ran a 180-meter course during their physical education class. The chart

shows the time it took each student to complete the course.

180-Meter

Course

Completion

Times

StudentTime (s)

1 30

2 32

3 33

4 35

5 37

6 38

7 40

8 45

How much faster was the average speed for Student 1 than the average speed for

Student 8?

• 2 m/s

• 3 m/s

• 1 m/s

• 2.5 m/s

Tags

NGSS.MS-PS3-1

Students measure how far a snail can travel per minute. The graph shows their data.

What is the speed of the snail?

• 0.25 min/cm

• 0.50 min/cm

• 1.00 cm/min

• 4.00 cm/min

Tags

NGSS.MS-PS3-1

A bus moves down the street at a rate of 500 meters per minute for 5 minutes.

Which graph shows the motion of the bus?

• 
• 
• 
• 

Tags

NGSS.MS-PS3-1

What happens to the kinetic energy of an object as the temperature increases?

• Particles begin to move in a fixed position.

• Kinetic energy increases.

• Kinetic energy decreases.

• Particles stop moving.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Heat always moves from ______.

• cold to hot

• hot to cold

• through conduction only

• through radiation only

Tags

NGSS.MS-PS1-4