PWMS Energy & Transformations

PWMS Energy & Transformations

Multiple Choice

A cold steel bar and a hot steel bar are suspended side-by-side and contained in a vacuum. They are not in physical contact. Which statement BEST describes the transfer of energy between the two steel bars?

• A. Energy transfers from the hot bar to the cold bar through the process of convection.

• Energy transfers from the cold bar to the hot bar through the process of convection.

• Energy transfers from the hot bar to the cold bar through the process of radiation.

• Energy transfers from the cold bar to the hot bar through the process of radiation.

Multiple Choice

Heat ALWAYS moves from ______ to ______.

• Hot to Cold

• Cold to Hot

Multiple Choice

True or False: Water boils at 100^° C and will get hotter the longer it boils.

• True: Water's boiling temperature can fluctuate.

• False: Water will boil at a CONSTANT 100^° C.

Multiple Choice

Using your cell phone is an example of what type of energy transformation?

• Chemical energy to light, sound and thermal energy.

• Light energy to chemical, sound and chemical energy.

• Electrical energy to light, sound and chemical energy.

• Chemical energy to light, sound and mechanical energy.

Multiple Choice

Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?

• Chemical to light

• Electrical to chemical

• Electrical to light

• Chemical to electrical

Multiple Choice

Electrical Energy is transferred to _____ Energy.

• Thermal
• Solar
• Electrical
• None

Multiple Choice

Solar Energy is transferred to _____ Energy.

• Mechanical
• Solar
• Sound
• Electrical

Multiple Choice

what type of energy is stored in a battery?

• electrical
• chemical
• thermal
• mechanical

Multiple Choice

According to the Law of Conservation of Energy, energy cannot be _________ or ____________.

• destroyed, destroyed

• created, saved

• created, destroyed

• lost, found

Multiple Choice

After the person eating, he went on a run. What's the energy transformation that's happening?

• mechanical→ thermal energy

• Chemical→ Mechanical energy

• radiation→ chemical

• chemical→ radiation energy

Multiple Choice

If the potential energy right before the ball is released is 10 kilojoules, at what point will the kinetic energy be 10 kilojoules?

• A

• B

• C

• D

Multiple Choice

Which potential energy diagram depicts an endothermic chemical reaction?

• 1

• 2

• 3

• 4

Multiple Choice

Bobby has an idea for a cell phone charger. It contains a small magnet surrounded by a copper coil. As a person carries the charger, the magnet moves back and forth through the coils, driving a current through the phone. Which energy transformation is the source of the energy driving the current?

• kinetic energy to electrical energy

• kinetic energy to mechanical wave energy

• frictional thermal energy to electrical energy

• electromagnetic energy to chemical potential energy

Multiple Choice

A temperature probe is placed within a beaker that contains a liquid. As the beaker is heated, some values for the temperature are placed on the scatter plot shown below.

Which statement best explains the trend for section 2?

• The liquid is boiling.

• The liquid is freezing.

• The liquid is getting cooler.

• The liquid is getting warmer.

Multiple Choice

All of the following are examples of convection currents, except:

• Warm air rising in a house

• Cold water sinking to the bottom of the lake

• Water flowing through pipes

• Steam from hot soup rising into the air

Multiple Choice

When two things are the same temperature:

• They have the same number of molecules

• Their molecules stop moving

• Their molecules move at the same speed

• Heat transfer between the two things stops

Multiple Choice

You feel the heat from a campfire

• Convection

• Conduction

• Radiation

Multiple Choice

A spoon in a cup of hot soup becomes warmer

• Convection

• Conduction

• Radiation

Multiple Choice

Hot water rises and cold water sinks.

• Convection

• Conduction

• Radiation