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Energy Study Guide/ Extra Credit

Total questions: 75

Worksheet time: 3hrs 41mins

Name
Class
Date
1.

Which method of heat transfer occurs through direct contact?

a)

Radiation

b)

Convection

c)

Conduction

d)

Evaporation

2.

Which of the following is an example of convection?

a)

A) A spoon heating up in hot soup

b)

B) The sun warming your skin

c)

C) Warm air rising in a room

d)

D) A metal rod getting hot at one end

3.

Radiation differs from conduction and convection because it:

a)

Requires a medium

b)

Transfers energy through particles

c)

Can occur in a vacuum

d)

Only happens in solids

4.

Which surface would absorb the most radiant energy?

a)

Shiny white

b)

Dull black

c)

Shiny silver

d)

Transparent glass

5.

Which of the following is the best conductor of heat?

a)

Copper

b)

Wood

c)

Plastic

d)

Glass

6.

What causes warm air to rise?

a)

It is heavier

b)

It is less dense

c)

It reflects radiation

d)

It conducts better

7.

Which is an example of radiation?

a)

Boiling water

b)

A microwave heating food

c)

A metal rod heating up

d)

A fan blowing warm air

8.

Which material is a good insulator?

a)

Aluminum

b)

Water

c)

Styrofoam

d)

Steel

9.

In which state of matter does convection occur most easily?

a)

Solid

b)

Liquid

c)

Gas

10.

Which of the following is NOT a method of heat transfer?

a)

Conduction

b)

Convection

c)

Radiation

d)

Compression

11.

What type of energy is stored in a stretched rubber band?

a)

Kinetic

b)

Thermal

c)

Potential

d)

Chemical

12.

Which of the following has the most kinetic energy?

a)

A parked car

b)

A rolling ball

c)

A compressed spring

d)

A battery

13.

Kinetic energy depends on:

a)

Mass and height

b)

Mass and speed

c)

Speed and temperature

d)

Height and temperature

14.

Potential energy increases when:

a)

An object is moving faster

b)

An object is lifted higher

c)

An object is cooled

d)

An object is compressed

15.

What is the formula for gravitational potential energy?

a)

KE = ½mv²

b)

PE = mgh

c)

PE = ½kx²

d)

E = mc²

16.

What is the kinetic energy of a 2 kg object moving at 3 m/s?

a)

3 J

b)

6 J

c)

9 J

d)

18 J

17.

A 5 kg object is lifted to a height of 10 m. What is its potential energy? (g = 9.8 m/s²)

a)

50 J

b)

98 J

c)

490 J

d)

980 J

18.

Which of the following is an example of energy transformation?

4 lines
19.

What is specific heat?

a)

Heat needed to melt a substance

b)

Heat needed to raise 1 kg of a substance by 1°C

c)

Heat needed to boil water

d)

Heat needed to change state

20.

What is the formula for heat energy?

a)

Q = mcΔT

b)

Q = mv²

c)

Q = mgh

d)

Q = P × t

21.

How much heat is needed to raise the temperature of 2 kg of water by 5°C? (c = 4186 J/kg°C)

a)

4186 J

b)

8372 J

22.

If 1000 J of heat raises the temperature of 0.5 kg of a substance by 10°C, what is its specific heat?

a)

20 J/kg°C

b)

100 J/kg°C

c)

200 J/kg°C

d)

500 J/kg°C

23.

Which factor does NOT affect the amount of heat absorbed?

a)

A) Mass

b)

B) Temperature change

c)

C) Specific heat

d)

D) Color

24.

Why does water heat up more slowly than metal?

a)

It has a lower density

b)

It has a higher specific heat

c)

It reflects heat

d)

It conducts heat better

25.

Energy is transferred from hot to cold objects by:

a)

Gravity

b)

Magnetism

c)

Heat

26.

Which is an example of energy transfer by conduction?

a)

Sunlight warming your face

b)

A pot heating on a stove

c)

Warm air rising

d)

A microwave oven

27.

Which of the following is a pathway for energy transfer in a power plant?

a)

Chemical → Thermal → Mechanical → Electrical

b)

Electrical → Mechanical → Thermal

c)

Mechanical → Chemical → Electrical

d)

Thermal → Electrical → Chemical

28.

Which of the following best describes energy conservation?

a)

Energy is destroyed in reactions

b)

Energy is created from nothing

c)

Energy changes form but is not lost

d)

Energy disappears after use

29.

Which of the following is an example of potential energy?

a)

A stretched bow

b)

A moving bicycle

c)

Sunlight

d)

Boiling water

30.

What is the main method of heat transfer in liquids?

a)

Conduction

b)

Convection

c)

Radiation

d)

Absorption

31.

Which factor increases the kinetic energy of an object?

a)

Decreasing its mass

b)

Lowering its height

c)

Increasing its speed

d)

Cooling it down

32.

Which material would make the best insulator?

a)

rubber

b)

steel

c)

copper

d)

aluminum

33.
When plants convert the sun's energy into food, which type of energy is it?
a)
kinetic
b)
chemical
c)
thermal
d)
radiant
34.

At what point does the biker have the greatest Kinetic Energy?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

35.

At what point does the biker have the greatest Potential Energy?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

36.

At what point does Potential Energy transform into Kinetic Energy?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

37.

Choose which things might spin a generator to produce electricity. (Check all that apply)

a)

wind

b)

water

c)

animals

38.
Wind turbines and windmills convert what energy to another?
a)
Kinetic to electric
b)
Gravitational potential to electric
c)
Mechanical to potential
d)
Thermal to sound
39.

Which will heat up faster?

a)

copper

b)

granite

c)

iron

d)

basalt

40.

Which of the following best explains why the sand at the beach is hotter than the water?

a)

Sand has a higher specific heat than water.

b)

Sand has a lower specific heat than water.

c)

There is more water than sand at the beach.

d)

There is more sand than water at the beach.

41.

The amount of energy required to raise the temperature 1ºC for every gram is called____?

a)

Thermal Energy

b)

Specific Heat

c)

Temperature

d)

Kinetic Energy

42.
What  is the formula to calculate heat energy required to raise the temperature of any substance?
a)
Q=mc∆t
b)
Q=mc
c)
Q= ½mv
d)
m=QC
43.

The specific heat of platinum is 0.133 J/g°C. How much heat(Q) is released when a 10 g piece of platinum cools from 100°C to 50°C?

a)

66.5 J

b)

665 J

c)

0.0266 J

d)

0.665 J

44.
Which object requires only mechanical energy to perform its main function?
a)
A
b)
B
c)
C
d)
D
45.
Conservation of energy states that energy cannot be ________ or ________, but can be altered from one form to another.
a)
created, destryoed
b)
gravity, force
c)
heat, created
46.
True or False The total amount of energy in a system will changed depending on its surroundings.
a)
true
b)
false
47.

The SI units J/g°C measures

a)

Specific heat

b)

mass

c)

temperature

d)

heat energy

48.
The specific heat of aluminum is 0.21 cal/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
d)
50 J
49.
20 g of water. specific heat of water is 4.18 J/g°C.  temperature changes from 25° C to 20° Chow much heat energy (Q) moves from the water to the surroundings?
a)
418 Joules
b)
209 J
c)
83 J
d)
4.18 J
50.

Heat lost or gains = ?

C = 4.18 J/g.c

M = 508 g

Change in Temp = 100 c and 120 c

a)

42,468.8 J/g.c

b)

42,468.8 J

c)

11,000 J

d)

12,456.3 J

51.

Heat lost or gains = ?

C = 4.18 J/g.c

M = 508 g

Change in Temp = 100 c and 120 c

a)

42,468.8 J/g.c

b)

42,468.8 J

c)

11,000 J

d)

12,456.3 J

52.
How does heat flow?
a)
Always from cold to warm
b)
Always from warm to cold
c)
Both warm to cold & cold to warm
d)
It depends on the temperature
53.

The heating curve below represents a sample of a substance starting as a solid below its melting point and being heated over a period of time. Which statement describes the energy of the particles in this sample during interval DE?

a)

Both potential energy and average kinetic energy increase.

b)

Both potential energy and average kinetic energy decrease.

c)

Potential energy increases and average kinetic energy remains the same.

d)

Potential energy remains the same and average kinetic energy increases.

54.

Heat is added to a sample of liquid water, starting at 80.°C, until the entire sample is a gas at 120.°C. This process, occurring at standard pressure, is represented by the balanced equation below.
H2O(l) + heat → H2O(g)

Which diagram correctly represents the heating curve for this physical change?

a)

b)

c)

d)

55.

Based on the graph and information shown in Figure 2, what phase change is occurring between minutes 2-6?

a)

fusion

b)

solidification

c)

vaporization

d)

condensation

56.

Fill in the blank: The graph in Figure 2 shows that the compound is in the ______ phase at 15°C.

a)

Solid

b)

Liquid

c)

Gas

57.

Given the diagram shown representing a heating curve for a substance: During which time interval is the average kinetic energy of the particles of the substance constant while the potential energy of the particles increases?

a)
  1. AC

b)
  1. BC

c)
  1. CD

d)

DF

58.

Is a metal cookie sheet a conductor or an insulator?

a)

Conductor

b)

Insulator

59.

Is a potholder a conductor or an insulator?

a)

Conductor

b)

Insulator

60.

Which of the following is an insulator for thermal energy?

a)

A coat

b)

A glass window

c)

A metal pan

61.

A car is traveling down a flat road. Its velocity increases. What happens to its kinetic energy?

a)

it increases

b)

it is constant

c)

it decreases

62.

A car is traveling down a flat road. It has its cruise control on. What happens to its kinetic energy?

a)

it increases

b)

it is constant

c)

it decreases

63.

The kinetic energy is 15 Joules. The mass is increased by a factor of 3. What is the new kinetic energy?

a)

5 Joules

b)

45 Joules

c)

1.7 Joules

d)

135 Joules

64.

Gravitational potential energy depends on the ________ and ________ of the object.

a)

Height and mass

b)

Friction and movement

c)

Mass and Movement

d)

Height and Friction

65.

What is the potential energy of a person flying down from a height of 1000 m that has a mass of 70 kg?

a)

1070 J

b)

700,000 J

c)

686,000 J

d)

9800 J

66.

What is the potential energy of a piece of paper falling off your desk from a height of 1 meter, if it has a mass of 0.05kg

a)

4.9 J

b)

9.8 J

c)

0.5 J

d)

0.49 J

67.

What is the energy of a 1325 kg mass that is rolling at a speed of 1.5 m/sec?

a)

19.4775 J

b)

19477.5 J

c)

1490.625 J

d)

1.497 J

68.

What is the KE of a football which has a mass of 0.8 kg and is kicked at a velocity of 10m/s.

a)

80 J

b)

3.2 J

c)

160 J

d)

40 J

69.

You serve a volley ball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30m/s. The ball has ____ kinetic energy. Calculate it.

a)

1890 J

b)

3780 J

c)

945 J

d)

31.5 J

70.

What is the force that is pulling a skydiver towards the Earth?

a)

Elastic Force

b)

Electrical Force

c)

Magnetic Force

d)

Gravitational Force

71.
Which type of energy increases when you compress a spring?
a)
elastic potential energy
b)
kinetic energy
c)
radiant energy
d)
sound energy
72.
What kind of energy is represented in the picture?
a)
Thermal
b)
Chemical
c)
Sound
d)
Nuclear
73.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

A

b)

G

c)

D

d)

C

e)

G

74.

How could you increase the gravitational potential energy of an object without changing its mass and gravity?

a)

Make the object larger

b)

Lower the object towards the ground

c)

Raise the object farther off the ground

d)

Allow the object to roll on the ground

75.
Energy can be _____________ or changed from one type to another.
a)
destroyed
b)
transferred
c)
created
d)
ignored