Question 1

What happens between Point C and Point E?

Accepted Answer

Potential energy is converted to kinetic energy

Answer

The total energy of the ball decreases

Answer

The total energy of the ball increases

Answer

Kinetic energy is converted to potential energy

Question 2

Which force changes the direction of the ball’s motion at Point C?

Accepted Answer

<P>gravity</P>

Answer

<P>friction</P>

Answer

magnetic force

Answer

the student's push

Question 3

A student states that the total energy of the ball is greatest at Point C. Is this student correct?

Accepted Answer

No, the potential energy is greatest at this point, but the total energy is the same at all of the points shown

Answer

Yes, the kinetic energy is greatest at Point C, which means its total energy is the greatest at this position as well

Answer

Yes, the potential energy is greatest at Point C, which means its total energy is the greatest at this position as well

Answer

No, the total energy is greatest at Points A and E

Question 4

According to the Law of Conservation of Energy, we know that energy can neither be created nor destroyed. Knowing this, what can you conclude about the energy used by the lamp?

Accepted Answer

The lamp’s mechanical energy comes from the electrical energy from the solar panel, which comes from the sun’s radiant energy

Answer

The lamp uses more energy than only what it is receiving from the solar panel

Answer

Once the lamp has been turned on, the energy it gives off is destroyed

Answer

The lamp’s mechanical energy does not have a known source

Question 5

Which are NOT examples of kinetic energy?

Accepted Answer

The chemical energy stored in the grass and the apples

Answer

The electrical energy of the solar panel powering the lamp

Answer

The radiant energy of the sun charging the solar panel

Answer

The mechanical energy of the wind making the kite fly

Question 6

Which energy transformation is taking place in the grass and tree in the model above?

Accepted Answer

transforming the sun’s kinetic energy into stored potential energy

Answer

transforming radiant energy into mechanical energy

Answer

transforming mechanical energy into electrical energy

Answer

transforming chemical energy into mechanical energy

Question 7

Maria turned on the phone with the power button. The phone vibrated and played a short tune when the screen began to load. What energy transformations occurred to make the phone vibrate?

Accepted Answer

Electrical energy was transformed into mechanical energy that was transformed into energy of motion

Answer

Mechanical energy was transformed into electrical energy that was transformed into sound energy

Answer

Mechanical energy was transformed into electrical energy that was transformed into energy of motion

Answer

Electricalenergy was transformed into mechanical energy that was transformed into soundenergy

Question 8

Maria noticed that the charge on the battery lasted longer when the phone was used just for talking. The phone had to be recharged more often when it was used to connect to the internet or play a game. Maria’s brother complained that some of the phone’s energy was being destroyed when this happened. Why was the brother’s statement incorrect?

Accepted Answer

Some of the energy was changed into heat instead of being transformed into electrical energy that the phone can use

Answer

The energy can be replaced by transforming electrical energy into chemical energy as the battery recharges

Answer

The games on the phone use up the energy because the screen stays on longer than normal

Answer

The energy is being destroyed when it is converted to the light energy used by the screen

Question 9

One of the energy transformations that occurs in the phone is the transformation of sound energy into electrical energy. Based on the diagram, in what part of the phone does this take place?

Accepted Answer

in the microphone

Answer

in the speaker

Answer

in the headphone jack

Answer

in the volume control

Question 10

What sort of energy transformation is taking place?

Accepted Answer

Electrical energy transforms to heat to make Ms. Bailey tea.

Answer

Heat moves from a cooler object to a warmer one

Answer

Kinetic energy transforms to potential energy

Answer

Light energy transforms to heat

Question 11

Which of the following statements best describes the energy involved in archery

Accepted Answer

Potential energy stored in the bow string and in Wyatt's muscles is transformed into the kinetic energy of the moving arrow

Answer

Some heat energy from the Wyatt's muscles is transferred to the arrow, but some is lost to the surroundings

Answer

The potential energy of the arrow is transformed into the muscle energy Wyatt requires to release the arrow

Answer

The amount of kinetic energy in the moving arrow increases as the arrow gets closer to the target

Question 12

What can Cordel and Rian conclude about the ball when it is at Position 2?

Accepted Answer

It has more kinetic energy than at any other labeled position

Answer

It has the slowest speed of any point on the diagram

Answer

It has more potential energy than it does at Position 4

Answer

It contains only potential energy

Question 13

At what point in this car’s motion is kinetic energy being converted to potential energy?

Accepted Answer

from Point 3 to Point 4 only

Answer

from Point 1 to Point 2 only

Answer

from Point 2 to Point 3 only

Answer

from Point 1 to Point 2 and Point 2 to Point3

Question 14

What happens to the kinetic energy of Lilac and sled as they travel down the hill and eventually slow down?

Accepted Answer

It is transformed into thermal energy and sound energy due to friction with the ground and air

Answer

It increases and remains as kinetic energy until the sled and rider encounter a force in the opposite direction

Answer

It is converted back to potential energy

Answer

It is lost to the environment as a whooshing sound

Question 15

After Bella’s first push at Point A, Brenden’s potential energy is greater at

Point C than when he swings back to Point A because

Accepted Answer

Some of the kinetic energy Brenden has between Point C and Point A is transformed into heat and sound due to friction

Answer

Gravity is stronger as it pulls Brenden through Point B the first time than it is when it pulls him through the same point on the way back toward Bella

Answer

Brenden’s momentum at Point C produces a pull force against the swing that takes away from his potential energy after that point

Answer

Bella provided energy in the form of a push at Point A, but that energy is lost at the opposite end of the swing (Point C)

Question 16

How will she make sure her results are considered scientific?

Accepted Answer

She will repeat her trials, and she will ask a friend to replicate her experiment with the same boxes to show the results are consistent

Answer

She will replicate her experiment to show that results for the experiment are consistent, and then she will have a friend repeat the experiment with different boxes

Answer

She will replicate her trials to show that results for the experiment are consistent, and she will have a friend create a graph from her data table

Answer

She will repeat her experiment using different-sized boxes to show her results are expected, and then she will have a friend check that she has not made a mistake when calculating density

Question 17

She decides that the data matches her expectations. How should she present this information to his teacher?

Accepted Answer

She should say the results support her hypothesis

Answer

She should say the results prove her hypothesis

Answer

She should say the results are similar to her hypothesis

Answer

She should say the results are the same as her hypothesis

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