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Unit 3: Energy Conservation and Nuclear Processes

Total questions: 60

Worksheet time: 59mins

Name
Class
Date
1.
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. 
2.

What kind(s) of energy is(are) in a person climbing a ladder?

a)

Potential

b)

Kinetic

c)

Both

d)

Need the mass of the person to determine.

3.

What kind of energy does an object possess when it's resting on top of the hill?

a)

Potential Energy

b)

Chemical Energy

c)

Kinetic Energy

d)

All of the above

4.

Which form of energy is represented in this image?

a)

kinetic

b)

thermal

c)

potential

d)

radiant

5.

This is a type of potential energy.

a)

Sound energy

b)

Electrical energy

c)

Chemical energy

d)

Thermal energy

6.

This is a type of kinetic energy.

a)

Gravitational energy

b)

Elastic energy

c)

Sound energy

d)

Nuclear energy

7.

Where is the car moving fastest?

a)

A

b)

B

c)

C

d)

D

8.

The rollercoaster has both PE and KE, but where will it have more PE than KE?

a)

1

b)

2

c)

3

d)

4

e)

5

9.

Where will the roller coaster have the most total mechanical energy? Check all that apply. Neglect friction and air resistance.

a)

1

b)

2

c)

3

d)

4

10.

If two objects are about to be dropped from some height, the heavier one has:

a)

Less potential energy

b)

More potential energy

c)

The same amount of potential energy

11.

The Law of Conservation of Energy states:

a)

Energy can created or destroyed but not transformed

b)

Energy cannot be created or destroyed, it can only transformed

c)

Energy can't be created, destroyed or transformed

d)

Energy cannot be created or destroyed.

12.

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?

a)

The PE and KE increase and decrease together

b)

The PE decreases while the KE increases

c)

Impossible to know without knowing the mass

d)

The PE and the KE decrease and increase together.

13.

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what is the ball's kinetic energy?

a)

100 J

b)

10 J

c)

10 N

d)

100 N

14.

You have to push with 15 N of force to move it 10 meters. How much work do you do?

a)

15 Joules

b)

150 Joules

c)

1.5 Newtons

d)

.67 Newtons

15.
Calculate the PE of a 2 kg cat perched 10 meters above the ground. 
a)
20 J
b)
200 J
c)
2.04 J
d)
200 W
16.
Calculate the Kinetic Energy (KE) of a girl whose mass is 50 kg who is moving at 4 m/s.
a)
200 J
b)
800 J
c)
400 J
d)
100 J
17.
When my velocity triples, my kinetic energy increases by ______ times.
a)
9
b)
 3 
c)
1.5
d)
4.5
18.

If a pendulum has 20 J of potential energy at point 1, how much kinetic energy will it have a point 3?

a)

0 J

b)

10 J

c)

20 J

d)

30 J

19.

If a pendulum has 30 J of kinetic energy at point 3, how much potential energy will it have a point 3?

a)

0 J

b)

10 J

c)

20 J

d)

30 J

20.
How do we calculate work?
a)
W = F * d
b)
w = f * D
c)
W = F * D
d)
w = f * d
21.

How much work is done on a 200-kg crate that is hoisted 2 m in a time of 4 s?

a)

400 J

b)

1000 J

c)

1600 J

d)

4000 J

22.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
23.
How do you calculate power?
a)
P = W/t
b)
P = E/t
c)
P = w * t
d)
P = bbq/chicken
24.

Which requires more power – a person walking up stairs or a person running up stairs?

a)

walking

b)

running

c)

they require equal power output

d)

no power is required at all

25.

How much power is required to raise a 200-kg crate a vertical distance of 2 m in a time of 4 s?

a)

400 W

b)

1000 W

c)

1600 W

d)

4000 W

26.

How much power is generated by Ashley (50 kg) running up a 6 m flight of stairs in 5 seconds?

a)

60 W

b)

62 W

c)

600 W

d)

1500 W

27.

Why is an electric oven not 100% efficient?

a)

Some energy is wasted as heat dissipated to the surroundings.

b)

Some energy is wasted as sound energy as the metal expands.

c)

There is no wasted energy.

d)

Because efficiency has to be a number between 0 and 1.

28.
Energy stored in the nucleus of an atom-the energy that holds the nucleus together. The energy in the nucleus of a uranium atom is an example.
a)
Electrical Energy
b)
Nuclear Energy
c)
Radiant Energy
d)
Potential Energy
29.

How does applying brakes make a car stop?

a)

The friction makes the tyres rub against the ground and get hot.

b)

Pressing the brake pedal releases air into the engine stopping the burning.

c)

It stops the petrol going to the engine.

d)

All of the cars kinetic energy is transferred to heat energy in the brakes due to friction.

30.

In a roller coaster the energy transfers are...

a)

Gravitational potential energy is transferred to kinetic energy with some energy lost as heat and dissipated to the surroundings.

b)

Gravitational potential energy is transferred to sound energy with some energy lost as heat and dissipated to the surroundings.

c)

Kinetic energy is transferred to potential energy with some energy lost as heat and dissipated to the surroundings.

d)

Kinetic energy is transferred to potential energy with some energy lost as sound and dissipated to the surroundings.

31.

What does a generator do?

a)

converts electricity into kinetic energy

b)

converts kinetic energy into electricity

c)

converts thermal energy to kinetic energy

d)

converts kinetic energy to potential energy

32.
Which is a renewable source of energy?
a)
coal
b)
uranium
c)
ocean tides
d)
natural gas
33.
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
34.
Which is a renewable source of energy?
a)
oil
b)
nuclear
c)
wind
d)
natural gas
35.

What is it called when a nucleus decays and releases energy and matter?

a)

fission

b)

fusion

c)

chain reaction

d)

radioactivity

36.
Takes two small nuclei and combines them into a larger nucleus
a)
fission
b)
fusion
37.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
half-life
d)
gamma radiation
38.
Where does fusion occur naturally?
a)
Underwater
b)
All around us
c)
In the radioactive waste
d)
On the sun
39.

The type of activity that occurs in nuclear facilities.

a)

Fusion

b)

Fission

c)

Alpha Decay

d)

Beta Decay

e)

Gamma Radiation

40.

The type of reaction that occurs in the Sun.

a)

Fusion

b)

Fission

c)

Alpha Decay

d)

Beta Decay

e)

Gamma Radiation

41.

The force that holds the nucleus of an atom together.

a)

Strong Nuclear Force

b)

Weak Nuclear Force

c)

Nuclear Compulsion

d)

Electrostatic Force

42.

Which of the following statements is true?

a)

Nuclear fission produces air pollution; nuclear fusion produces radioactive wastes

b)

Nuclear fission produces energy when atoms are split; nuclear fusion produces energy when atoms are combined.

c)

Nuclear fission occurs on the sun; nuclear fusion occurs in a nuclear power plant.

43.
One disadvantage of nuclear energy is ___.
a)
it is a fossil fuel
b)
it leaves behind radioactive waste
c)
it emits large amounts of pollution into the atmosphere
d)
there are no disadvantages
44.
This is an example of...
a)
Fission  reaction
b)
Fusion reaction
c)
Decomposition reaction
d)
Combustion
45.

One end product of fission is

a)

energy only

b)

nuclei only

c)

several smaller nuclei

d)

neutrons only

46.

Fusion converts hydrogen into

a)

uranium

b)

helium

c)

plutonium

d)

radon

47.
Two atoms of the same element but with different mass numbers are called________
a)
electrons
b)
isotopes
c)
ions
d)
reaction partners
48.

How many neutrons does this isotope of lithium have?

a)
8
b)
3
c)

11

d)
5
49.

What do these isotopes of carbon all have in common?


126C, 136C, 146C

a)

they all have the same number of neutrons & mass number

b)

they all have the same atomic number and neutrons

c)

they all have the same atomic number and electrons

d)

they all have the same number of protons, atomic number, and mass number

50.

The mass number of an element shows...

a)

Number of protons only

b)

Number of protons and electrons

c)

Number of protons and neutrons

d)

Number of neutrons only

51.
Which types of radiation is the most dangerous?
a)
Alpha
b)
Gamma
c)
They are equally dangerous
d)
Beta
52.
Which is not true of radioactive decay?
a)
It is a result of instability in atoms
b)
It happens only in nuclear power plants
c)
Radioactivity can be useful
d)
It is hazardous to human health
53.
Alpha particles.....
a)
a) are positively charged.
b)
b) consist of two protons and four neutrons.
c)
c) can penetrate any thickness of matter
d)
d) All of the above 
54.

Which type of nuclear radiation is being emitted here?

a)

Alpha

b)

beta

c)

gamma

d)

none

55.
Negatively charged particles emitted from a nucleus at a high speed are ____.  
a)
alpha particle
b)
gamma rays
c)
beta particles
d)
X rays
56.

Which radioactive emission is the heaviest?

a)

Alpha

b)

Beta

c)

Gamma

57.
Positively charged particles that consist of two protons and two neutrons are called
a)
alpha particles
b)
beta particles
c)
gamma rays
d)
neutron emissions
58.
What does a gamma ray consist of? 
a)
Photons
b)
Electrons
c)
Protons
d)
Neutrons
59.

When a nucleus undergoes gamma decay, the atomic number of the element....

a)

remains the same

b)

decreases by one.

c)

increases by one.

d)

increases by two.

60.
There is the same amount of energy today as when the world began.
 
a)
True
b)
False

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