Quiz about IQWST Unit 2 - Why Do Some Things Stop While Others Keep Going?

Question 1

Which of the following represents energy being converted?

Accepted Answer

stretching a rubber band, then letting it go

Accepted Answer

dropping a ball

Accepted Answer

playing with a yo-yo

Answer

a book sitting on a desk

Question 2

You are getting ready to shoot an arrow into a target. You take the arrow and place it into the bow. You pull the string back and release the arrow.

What type of energy is represented in the picture of the bow and arrow in Figure 1?

Accepted Answer

elastic energy

Answer

kinetic energy

Answer

gravitational energy

Question 3

You are getting ready to shoot an arrow into a target. You take the arrow and place it into the bow. You pull the string back and release the arrow.

Which type of energy conversion is involved when the arrow is released in Figure 2?

Accepted Answer

The energy is transformed into kinetic energy.

Answer

The energy is transformed into elastic energy.

Answer

The energy is transformed into gravitational energy.

Question 4

What factors influence the amount of elastic energy in an object?

Accepted Answer

stretching

Accepted Answer

compression

Accepted Answer

hardness

Answer

mass

Question 5

At which point on the roller coaster will the car have the greatest amount of kinetic energy?

Accepted Answer

X

Answer

W

Answer

Y

Answer

Z

Question 6

At which point on the roller coaster will the car have the greatest amount of gravitational energy?

Accepted Answer

W

Answer

X

Answer

Y

Answer

Z

Question 7

Select two (2) types of energy types that are present at point Y.

Accepted Answer

kinetic energy

Accepted Answer

gravitational energy

Answer

elastic energy

Answer

chemical energy

Question 8

As the roller coaster car travels from Point W to Point X, what happens to its gravitational energy?

Accepted Answer

decreases

Answer

increases

Answer

remains the same

Question 9

As the roller coaster car travels from Point X to Point Y, what happens to its kinetic energy?

Accepted Answer

decreases

Answer

increases

Answer

remains the same

Question 10

Which of the following changes would not change the energy of the roller coaster car?

Accepted Answer

increasing the volume of the rollercoaster car

Answer

increasing the height of the starting point of the rollercoaster car

Answer

increasing the speed that the rollercoaster car is traveling

Question 11

Which object has more thermal energy: a large pot of water or a small pot of water at the same temperature?

Accepted Answer

The large pot has more thermal energy.

Answer

Both pots have the same thermal energy.

Answer

The small pot has more thermal energy.22

Question 12

Which of the following types of energy is an example of potential energy?

Accepted Answer

gravitational energy

Answer

thermal energy

Answer

sound energy

Question 13

A cold can of soda is taken out of the refrigerator. It slowly warms up until it is at room temperature. Once the soda has warmed up, it has more thermal energy than it had in the refrigerator. Where did this additional thermal energy come from?

Accepted Answer

The additional thermal energy came from the air in the room.

Answer

The additional thermal energy was already in the soda.

Answer

The additional thermal energy came from the refrigerator.

Question 14

A student drops a ball from five feet above the ground. After bouncing once, it reaches a maximum height of 157 cm above the ground. The following diagram shows the maximum height the ball reaches after consecutive bounces.

Which of the following energy types are involved with bouncing a rubber ball?

Accepted Answer

all of the above

Answer

kinetic energy

Answer

elastic energy

Answer

gravitational energy

Question 15

A student drops a ball from five feet above the ground. After bouncing once, it reaches a maximum height of 157 cm above the ground. The following diagram shows the maximum height the ball reaches after consecutive bounces.

Does the bar graph contradict the idea of energy conservation? Why or why not?

Accepted Answer

No. The kinetic energy of the ball decreases, but the total amount of energy of the ball and the surroundings remains constant.

Answer

Yes. Since the height of the bounces is decreasing, that shows that the energy in the system is not conserved.

Question 16

A simple pendulum is a mass hanging from a string. The pendulum is moved by picking up the mass to any angle and releasing it. The figure shows a pendulum moving through one swing and the energy transformation diagrams at positions #1 through #3.

Looking at the energy transformation diagrams, what type of energy is represented by the white color?

Accepted Answer

gravitational energy

Answer

kinetic energy

Answer

chemical energy

Question 17

A simple pendulum is a mass hanging from a string. The pendulum is moved by picking up the mass to any angle and releasing it. The figure shows a pendulum moving through one swing and the energy transformation diagrams at positions #1 through #3.

Looking at the energy transformation diagrams, what type of energy is represented by the gray color?

Accepted Answer

kinetic energy

Answer

gravitational energy

Answer

chemical energy

Question 18

A simple pendulum is a mass hanging from a string. The pendulum is moved by picking up the mass to any angle and releasing it. The figure shows a pendulum moving through one swing and the energy transformation diagrams at positions #1 through #3.

What does the energy transformation diagram look like for position #5?

Accepted Answer

same as position #1

Answer

same as position #2

Answer

same as position #3

Question 19

Have you ever wondered where the energy that you use in your house comes from? Well, the answer is that it comes from several different sources. Natural gas and coal are the two major sources of energy that power plants use to make our electricity.

In this section we will take a deeper dive into how electricity is produced by a coal power plant, using the diagram as a guide.

The process begins when coal is mined from the ground. Coal is a black sedimentary rock with an interesting property -- it can be set on fire to release energy!

The coal that is mined is taken to a power plant. At the power plant, the coal is burned, which releases incredible amounts of heat. This heat then creates steam that turns turbines. These turning turbines are then able to transfer energy to generators, which create electricity.

When coal is burned to produce heat, which energy transformation is occurring?

Accepted Answer

Chemical energy transforms into thermal energy.

Answer

Chemical energy transforms into elastic energy.

Answer

Kinetic energy transforms into electrical energy.

Question 20

When turning turbines power generators to make electricity, which energy transformation is occurring?

Accepted Answer

Kinetic energy transforms into electrical energy.

Answer

Gravitational energy transforms into electrical energy.

Answer

Chemical energy transforms into thermal energy.

IQWST Unit 2 - Why Do Some Things Stop While Others Keep Going?

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