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Unit 2 Energy Review

Total questions: 75

Worksheet time: 3hrs 30mins

Name
Class
Date
1.

Kinetic Energy Equation:

KE = 1/2 m v2

The "m" is...

a)

Velocity

b)

Kinetic Energy

c)

Height

d)

Mass

2.

Kinetic Energy Equation:

KE = 1/2 m v2

The "v" is...

a)

Velocity

b)

Kinetic Energy

c)

Height

d)

Mass

3.

Gravitational Energy Equation:

GPE = m g h

The "m" is...

a)

Mass

b)

Gravitational Energy

c)

Height

d)

Gravity (9.8 m/s2)

4.

Gravitational Energy Equation:

GPE = m g h

The "g" is...

a)

Mass

b)

Gravitational Energy

c)

Height

d)

Gravity (9.8 m/s2)

5.

Gravitational Energy Equation:

GPE = m g h

The "h" is...

a)

Mass

b)

Gravitational Energy

c)

Height

d)

Gravity (9.8 m/s2)

6.

Mass is measured in...

a)

meters (m)

b)

Joules (J)

c)

kilograms (kg)

d)

meters/second (m/s)

7.

Velocity is measured in...

a)

meters (m)

b)

Joules (J)

c)

kilograms (kg)

d)

meters/second (m/s)

8.

Energy is measured in...

a)

meters (m)

b)

Joules (J)

c)

Newton/meter (N/m)

d)

meters/second (m/s)

9.

Height (h) is measured in...

a)

meters (m)

b)

Joules (J)

c)

Newton/meter (N/m)

d)

meters/second (m/s)

10.

If a ball rolls with a velocity of 4 m/s, and it has a mass of 1 kg, how much KE does it have?

a)

8 J

b)

2 J

c)

4 J

d)

16 J

11.

If a toy car moves with a velocity of 2 m/s, and it has a mass of 2 kg, how much KE does it have?

a)

8 J

b)

2 J

c)

4 J

d)

16 J

12.

A brick is held 10 m above the ground, and it has a mass of 1 kg. How much GPE does it have?

a)

10 J

b)

98 J

c)

9.8 J

d)

49 J

13.

Initially, the cart is not moving, and the spring is compressed. What type(s) of energy is in the system?

a)

Elastic Energy (EPE)

b)

Gravitational Energy (GPE)

c)

Kinetic Energy (KE)

d)

Loss (L)

14.

A ball is at the TOP of a FRICTIONLESS ramp, not moving. What type(s) of energy is in the system?

a)

Elastic Energy (EPE)

b)

Gravitational Energy (GPE)

c)

Kinetic Energy (KE)

d)

Loss (L)

15.

A ball is moving on the floor at the BOTTOM of a FRICTIONLESS ramp. What type(s) of energy is in the system?

a)

Elastic Energy (EPE)

b)

Gravitational Energy (GPE)

c)

Kinetic Energy (KE)

d)

Loss (L)

16.

A skater is rolling down a FRICTIONLESS track. What type(s) of energy is in the system?

a)

Elastic Energy (EPE)

b)

Gravitational Energy (GPE)

c)

Kinetic Energy (KE)

d)

Loss (L)

17.

What is an example of loss (L)?

a)

A stretched rubber band.

b)

A person standing at the top of a ladder.

c)

A ball rolling on the floor.

d)

Friction between car tires and the road.

18.

What happens to the kinetic energy (KE) when the mass is increased?

a)

It increases.

b)

It decreases.

c)

It stays the same.

19.

What happens to the kinetic energy (KE) when the velocity is decreased?

a)

It increases.

b)

It decreases.

c)

It stays the same.

20.

You lift a golf ball and a bowling ball up in the air, 1 m above the ground. Which has more gravitational energy (GPE)?

a)

The golf ball.

b)

The bowling ball.

c)

They both have the same GPE.

21.

Law of Conservation of Energy says that...

a)

You can create energy.

b)

You can destroy energy.

c)

Energy changes forms, but the total amount stays the same.

22.

What is total energy?

a)
It is what metal creates when heated.
b)
All potential and kinetic energy in a system.
c)
It is motion of all matter.
d)
Energy of momentum.
23.
Explain what happens to the potential energy of a rock as it falls off the side of a cliff.
a)
The kinetic energy decreases as the potential energy increases.
b)
The kinetic energy decreases as the potential energy decreases.
c)
The potential energy decreases as the kinetic energy increases.
d)
The potential energy decreases as the kinetic energy decreases. 
24.

If a ball tossed into the air has a maximum gravitational potential energy of 5.75 joules, what is its maximum kinetic energy in the same toss?

a)

5.75 joules

b)

11.14 joules

c)

2.88 joules

d)

7.93 joules

25.

Where is the car moving fastest?

a)

A

b)

B

c)

C

d)

D

26.

Which of the following is FALSE according to the law of conservation of energy?

a)

total mechanical energy in a system is conserved

b)

the amount of energy in a system always changes

c)

if you add up the kinetic and potential energies for a system at any given time, the total energy will always be the same value

d)

Energy in a system can be transformed into different types of energy but it can never be destroyed

27.

Which of the following is INCORRECTLY matches the type of energy with its description?

a)

Kinetic Energy - energy of motion

b)

Gravitational Potential - energy due to position

c)

Elastic Potential - energy stored in a spring

d)

Thermal Energy Energy - gaining energy in the form of sound

28.

What is energy?

a)

moving energy

b)

stored energy

c)

renewable energy

d)

The ability to do work.

29.

A 7.14 kg object has 700 J of stored gravitational potential energy. How high above the ground is the object?

a)

0.9m

b)

7.14m

c)

10m

d)

20m

30.

A 2kg ball rolls with a KE of 36 J - what is the speed of the ball?

a)

6m/s

b)

7.4m/s

c)

18m/s

d)

None of these

31.

The energy associated with the total energy of the particles (atoms and molecules) in an object

a)

Nuclear

b)

Thermal

c)

Electromagnetic

d)

Chemical

32.

The energy of moving electric charges

a)

Nuclear

b)

Electromagnetic

c)

Thermal

d)

Electrical

33.

Energy that travels in waves such as light, infrared, ultraviolet, microwaves, x-rays, etc.

a)

Thermal

b)

Electromagnetic

c)

Chemical

d)

Sound

34.

Mechanical Energy includes what two types of energies?

a)

Nuclear and Thermal

b)

Gravitational and Electrical

c)

Potential and Kinetic

d)

Elastic and Electromagnetic

35.
Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?
a)
Chemical to light
b)
Electrical to chemical
c)
Electrical to light
d)
Chemical to electrical
36.
What energy transformations take place when a battery-operated radio is in use?
a)
Electrical to chemical to light
b)
Sound to chemical to mechanical
c)
Chemical to electrical to sound
d)
Light to electrical to thermal
37.
Which of the following devices transforms electrical energy into mechanical energy?
a)
An e-reader
b)
a fan
c)
a manual pencil sharpener
d)
ipod
38.
A television works by transforming electrical energy into what other kinds of energy?
a)
Light, thermal, and sound
b)
Thermal, chemical, and solar
c)
Sound, mechanical, and electrical
d)
Light, chemical, and mechanical
39.
What is produced during ALL energy transformations?
a)

Sound Energy

b)

Mechanical Energy

c)

Thermal (Heat) Energy

d)

Chemical Energy

40.

What energy transformation occurs as a mouse produces body heat?

a)

Chemical --> Thermal

b)

Thermal --> Chemical

c)

Electrical --> Thermal

d)

Thermal --> Mechanical

41.

A skydiver jumps out of a helicopter. What is happening in terms of energy?

a)

He is gaining potential energy as he falls, and losing kinetic energy.

b)

He is gaining kinetic energy as he falls and losing potential energy.

c)

His kinetic and potential energy is always the same.

d)

He is gaining kinetic and potential energy at the same time.

42.
What do Temperature and Thermal Energy have in Common?
a)
They both measure kinetic energy, just in different ways
b)
Temperature and Thermal Energy are the same thing
43.
What is the difference between temperature and thermal energy?
a)
Thermal Energy=Average Kinetic Energy
Temperature=Total Kinetic Energy
b)
Thermal Energy=Total Kinetic Energy
Temperature=Average Kinetic Energy
44.
Thermal Energy transfer in gas or liquid is...
a)
Conduction
b)
Convection
c)
Radiation
45.
Thermal Energy transfer by Directly Touching (no movement of matter needed) is...
a)
Conduction
b)
Convection
c)
Radiation
46.
Thermal energy transfer through electromagnetic rays i...
a)
Conduction
b)
Convection
c)
Radiation
47.
Why does a metal lawn chair get hot in the sun when the grass sitting in the same sunlight remains cool to the touch?
a)
Heat travels easily through plants but not metals.
b)
Heat travels easily through both plants and metals.
c)
Heat travels easily through metal objects but not through plants.
48.
Warm air rises and the cool air sinks demonstrates this type of heat transfer. 
a)
conduction
b)
convection
c)
radiation
d)
Insolation 
49.
The sun warming your skin is an example of heat transfer through 
a)
conduction
b)
convection
c)
radiation
d)
thermal electricity
50.

Why would the temperature of boiling water be higher than the temperature of ice water?

a)

Because the particles in the boiling water are moving faster.

b)

Because the particles in the boiling water aren't moving at all.

c)

Because the particles in the boiling water are moving slower.

d)

Because the particles in the boiling water are moving at the same speed.

51.
Is a measure of how hot or cold something is 
a)
Cold
b)
Heat
c)
Temperature
d)
Thermal Energy 
52.

Heat will always transfer from the ___________ object to the ________ object.

a)

The hottest object to the coolest object.

b)

The coolest object to the hottest object.

c)

The solid object to the liquid object.

d)

The liquid object to the solid object.

53.
The amount of energy required to raise the temperature 1ºC for every kilogram is called____?
a)
Thermal Energy
b)
Specific Heat
c)
Temperature
d)
Kinetic Energy
54.
Water has a specific heat of 4184 J/KgºC.  Wood has a specific heat of 1760 J/KgºC.  What material needs more energy to raise the temperature 1ºC
a)
Wood
b)
Water
c)
Both are the same
55.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
56.

Why might you want to have a metal roof on your house if you live in a hot climate?

a)

you won't lose any shingles when hurricanes occur

b)

metal reflects incoming solar radiation and has a warming effect

c)

metal reflects incoming solar radiation and has a cooling effect

d)

metal absorbs incoming solar radiation and has a cooling effect

57.

What surface reflects the most light?

a)

the oceans

b)

Ice in the Arctic or Antarctic

c)

the grass

d)

roads

58.

Two objects have different temperatures. Object A has a temperature of 42 degrees and Object B is 37 degrees. Which direction should the energy transfer between Objects A and B?

a)

From Object A to Object B

b)

From Object B to Object A

c)

Energy will not transfer

d)

Energy will transfer both directions

59.
The most common temperature scale used in the world where water freezes at 0 degrees and boils at 100 degrees is called the __________________ scale.
a)
Celsius
b)
Fahrenheit
c)
Pound
d)
Kelvin
60.
A temperature scale that is used mostly in United States. 
According to it, water freezes at 32 degrees and boils at 212 degrees.
a)
Celsius
b)
Fahrenheit
c)
Kelvin
d)
All of them
61.
What is the measurement of the average kinetic energy of a substance?
a)
Kinetic energy
b)
Temperature
c)
Thermal energy
d)
Potential energy
62.
What is a substance that does NOT conduct heat well?
a)
Conductor
b)
Insulator
c)
Convector
d)
Radiator
63.
What is a substance that DOES conduct heat well?
a)
Conductor
b)
Insulator
c)
Convector
d)
Radiator
64.

What is the symbol for specific heat?

a)

Q

b)

t

c)

m

d)

C

65.

Which equation is used to calculate energy?

a)

Q=mc∆t

b)

Q=mc

c)

Q= ∆mct

d)

m=QC

66.

A material was cooled from 100ºC to 40ºC. What is the change in temperature?

a)

60ºC

b)

40ºC

c)

-60ºC

d)

-40ºC

67.

If the specific heat of water is 4.18 J/g∙°C, how much heat is required to increase the temperature of 1.2 g of water from 23 °C to 39 °C?

a)

-80.256 J

b)

44.938.6 J

c)

80.256 J

d)

112.575.9 K

68.
A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of  0.10 J/g°C, what is the mass of the iron sample?
a)
25 g
b)
30 g
c)
20 g
d)
50 g
69.
The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?
a)
12.82 °C
b)
24.12°C
c)
351 °C
70.
Calculate the heat absorbed by 105.0 grams of water when it is heated to cook spaghetti. The initial temperature of the water is 20.0°C, and the final temperature of the water is 99.0°C. The specific heat of water is 4.18 J/g•°C.
a)
8778 J/g°C
b)
0.0005 J/g°C
c)
34673 J/g°C
d)
43451.1 J/g°C
71.
The temperature of an unknown piece of metal with a mass of 30.00 g changes from 25.0 °C to 35.0 °C when the metal absorbs 350.0 J of energy. What is the specific heat of the metal?
a)
1.17 J/g°C
b)
-1.17 J/g°C
c)
0.857 J/g°C
d)
-0.857 J/g°C
72.
A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C.  Calculate the specific heat capacity of iron.    
a)
0.46 J/gxoC
b)
1.654 J/gxoC
c)
2,567,446.875 J/gxoC
73.
 How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/gx°C?    
a)
297 Joules
b)
0.003 Joules
c)
297 J/gx°C
d)
0.003 J/gx°C
74.

A 0.3 g piece of copper is heated and fashioned into a bracelet. The amount of energy transferred by heat to the copper is 66,300 J. If the specific heat of copper is 390 J/g˚C, what Is the change of the copper's temperature?

a)

566.7 °C

b)

77,571,000 Joules

75.
The specific heat of aluminum is 0.21 J/g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?
a)
105 J
b)
10.5 J
c)
1.05 J

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