MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Describe the amount of potential energy in a bouncing ball.

a. it has the most potential energy when the ball hits the ground

b. there is more potential energy at the highest point of the bounce

c. with each bounce, there is an increasing amount of potential energy at the top of the bounce

d. more potential energy is found halfway between the ground and the top of the bounce

Correct Answer: b

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

What energy conversion takes place in photosynthesis?

a. heat energy to chemical

b. light energy to heat

c. light energy to chemical

d. mechanical energy to chemical

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Which of these is an example of chemical energy being converted to electrical energy?

a. a 9-volt battery in a smoke alarm

b. sunlight used by plants in photosynthesis

c. a windmill generating electricity

d. a blender grinding up strawberries

Correct Answer: a

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

What energy conversion takes place during cellular respiration?

a. heat energy to mechanical

b. heat energy to chemical

c. chemical energy to light

d. chemical energy to mechanical

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Which of these is an example of electrical energy being converted to mechanical energy?

a. flashlight

b. sunlight used by plants in photosynthesis

c. lightning striking the ground

d. fan

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Match the correct energy conversion to each example

1. gas lawnmower a. electrical energy to mechanical

2. sunlight used by plants to photosynthesis b. mechanical energy to heat

3. jogging c. chemical energy to mechanical

4. blender making crushed ice d. light energy to chemical

Correct Answers:

1. c

2. d

3. b

4. a

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

As water flows through a dam it can be used to create electrical energy. The electrical energy is formed from the water's stored

a. Electrical energy

b. Heat energy

c. Gravitational Potential energy

d. Nuclear energy

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

The burning of vaporized gas in the cylinder of an automobile engine pushes the pistons.  This is an example of an energy conversion from chemical to:

a. Electrical energy

b. Heat energy

c. Mechanical energy

d. Nuclear energy

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

These statements describe some type of energy. Place the letter that describes the energy type in the blank in front of each statement.

1. __________ A boy sitting on a stump. A. Solar

2. __________ A girl throwing a ball. B. Wind

3. __________ A car going down a street. C. Kinetic

4. __________ A tank truck full of gasoline D. Electromagnetic

E. Potential

Correct Answers:

1. e

2. c

3. c

4. e

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Identify the energy change(s) that take place as a candle burns.

a. Chemical to heat energy

b. Chemical to electric energy

c. Electric to mechanical energy

d. Electric to heat energy

e. Mechanical to electric energy

Correct Answer: a

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Identify the energy change(s) that take place in a food blender.

a. Chemical to heat energy

b. Chemical to electric energy

c. Electric to mechanical energy

d. Electric to heat energy

e. Mechanical to electric energy

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Identify the energy change(s) that take place in a blow dryer.

a. Chemical to heat energy

b. Chemical to electrical energy

c. Electrical to mechanical energy

d. Electrical to heat energy

e. Mechanical to electrical energy

Correct Answer: d or c

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

A car toy that is powered by batteries would be an example of the conversion of chemical energy to:

a. Heat energy

b. Mechanical energy

c. Nuclear energy

d. Sound energy

Correct Answer: b

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Energy that is the result of the internal motion of particles of matter is termed

a. Electrical energy

b. Heat energy

c. Mechanical energy

d. Nuclear energy

Correct Answer: b

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

The burning of vaporized gas in the cylinder of an automobile engine pushes the pistons. This is an example of an energy conversion from chemical to

a. Electrical energy

b. Heat energy

c. Mechanical energy

d. Nuclear energy

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Peter went exploring in a near-by cave.  At one point, he decided to rest and turned off his flashlight.  There was complete darkness.  When will Peter's eyes adjust to the darkness so he can see?

a. 5 minutes

b. 30 minutes

c. 1 hour

d. never

Correct Answer: d

I	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Above is a dump truck at the Bingham copper mine in Magna preparing to dump a boulder of copper ore down a slope. Answer the following questions about the boulder.

1. At what point does the boulder have its maximum gravitational potential energy?

a. A

b. B

c. C

d. D

2. Assuming the boulder falls steadily down the hill when it is dumped, when will it reach its maximum kinetic energy?

a. A

b. B

c. C

d. D

3. At which location(s) will the boulder have less potential energy than at point D?

a. A

b. B

c. C

d. D

Correct Answers:

1. a

2. c

3. c

I	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

A ball is bounced on a flat surface and its path is traced in the drawing above after being thrown down at point A.

1. Where in the ballÕs path is its potential energy the greatest?

a. A

b. B

c. C

d. D

2. Where in the ballÕs path is its kinetic energy the least?

a. A or C

b. B or D

c. C only

d. D only

3. What is happening to the ballÕs potential and kinetic energy between points A and B?

a. potential energy is decreasing and kinetic energy is increasing

b. both kinetic and potential energy first increase then decrease

c. both kinetic and potential energy first decrease then increase

d. kinetic energy is decreasing and potential energy is increasing

Correct Answers:

1. b

2. b

3. d

I	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Marcia is throwing a ball to her friend Thomas. She throws the ball high up in the air so it reaches a height of 20 meters and then comes back down to Thomas.   As the ball is thrown, energy is transferred back and forth between potential and kinetic energy.

Answer the following questions about the transfer of energy.

1. Where is potential energy the greatest?

a. Position 1

b. Position 2

c. Position 3

d. Position 4

2. Where is kinetic energy the greatest?

a. Position 1

b. Position 2

c. Position 3

d. Position 4

3. Where is potential energy the lowest?

a. Position 1

b. Position 2

c. Position 3

d. Position 4

4. Where is kinetic energy the lowest?

a. Position 1

b. Position 2

c. Position 3

d. Position 4

5. Which statement best describes the energy conversions taking place as the ball is tossed up and comes down?

a. Kinetic and Potential energy are equal going up and coming down

b. Energy transfers from kinetic to potential and back to kinetic

c. Energy transfers from potential to kinetic and back to potential

d. Energy transfers back and forth between potential and kinetic going up and coming down

Correct Answers:

1. c

2. a

3. a

4. c

5. b

I	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

1. At which position in the pendulum swing is kinetic energy greatest?

a. A

b. B

c. C

d. D

2. At which position in the pendulum swing is potential energy the lowest?

a. A

b. B

c. C

d. D

3. At which position in the pendulum swing is potential energy greatest?

a. A

b. B

c. C

d. D

Correct Answers:

1. b

2. b

3. a

MC	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

A ball is thrown into the air as shown above. At what point in the path of the ball is kinetic energy entirely changed into potential energy?

a. A

b. B

c. C

d. D

Correct Answer: c

I	8^th Grade Integrated Science	Standard: 04
Objective: 04. Analyze various forms of energy and how living organisms sense and respond to energy.
ILO:

Jodi and Paulo set up an experiment to see if seeds have a correct orientation for best sprouting. They studied 15 bean seeds before planting them in paper cups with the same amount of potting soil. They plant each seed with a slightly different orientation: standing on end, with the spot facing down, with the spot facing up, etc. All the cups are placed in the same amount of light and given the same amount of water. After 9 days, every plant was between 5 and 6 cm tall, with only very slight variation among them.

1. Identify the independent (manipulated) variable in this experiment.

a. height of the plants

b. orientation of the seed

c. how many days they grew

d. how much water they were given

2. Identify the dependent (responding) variable in this experiment.

a. height of the plants

b. orientation of the seed

c. how many days they grew

d. how much water they were given

3. What is a good conclusion for this experiment?

a. bean seeds will all grow nearly the same when given the same amount of light and water

b. there is a definite up and down side to bean seeds

c. bean seeds grow best when they are planted right side up

d. there is no up or down orientation to bean seeds

4. If Jodi and Paulo redid their experiment, this time with 30 seeds, predict the outcome after 9 days.

a. all the plants will be about 5 or 6 cm tall