Energy Exam

Which graph correctly shows the effect of heat energy on the motion of molecules of matter?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

The diagram shows a pinwheel rotating above a lit candle. The arrows indicate the direction

of air flow.

Which energy transformation is best shown in this diagram?

• heat to mechanical

• sound to heat

• mechanical to light

• heat to sound

Tags

NGSS.MS-PS3-4

The graph below shows the heating curve for substance X.

At approximately which temperature does a phase change begin?

• −30°C

• 0°C

• −10°C

• 18°C

Tags

NGSS.MS-PS1-4

A wet shirt is put on a clothesline to dry on a sunny day. The shirt dries because water molecules:

• gain heat energy and condense

• gain heat energy and evaporate

• lose heat energy and condense

• lose heat energy and evaporate

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Four machines that convert ELECTRICAL energy to MECHANICAL energy were tested for fuel efficiency. The results of the test are shown in the chart below.

Which machine produced the most HEAT energy?

• A = 20 UNITS OF HEAT ENERGY

• B = 30 UNITS OF HEAT ENERGY

• C = 35 UNITES OF HEAT ENERGY

• D = 60 UNITS OF HEAT ENERGY

Tags

NGSS.MS-PS3-3

Which sequence of energy transformations occurs after a battery-operated flashlight is turned on?

• electrical → light → chemical

• electrical → chemical → light

• chemical → light → electrical

• chemical → electrical → light

The diagrams show liquid water changing to water vapor in four different situations. Which observation would be evidence that the water is undergoing a phase change?

• Waves form on the top of the pond.

• Water soaks into the wet sand.

• The water splashes out of the swimming pool.

• The water level in the glass of water decreases.

Tags

NGSS.MS-PS1-4

How is heat energy transferred within the liquid water in the pond?

• compound formation

• convection currents

• chemical reactions

• nuclear reactions

Tags

NGSS.MS-PS3-4

A television set changes electrical energy to sound and light energy. In this process, some energy is:

*remember: energy can NOT be created or destroyed, only transferred!

• created

• destroyed

• changed to matter

• changed to heat

Tags

NGSS.MS-PS3-5

Energy from the Sun reaches Earth mainly by the process of:

• conduction

• convection

• radiation

• reflection