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Physical World Revision

Total questions: 43

Worksheet time: 34mins

Name
Class
Date
1.

The ability to do work

a)

Science

b)
Energy 
c)
Matter
d)
Math
2.

The symbol for energy is

(a)  

3.

The unit for energy is _.

(a)  

4.

Energy can be created.

a)

True

b)

False

5.

Energy can be transformed.

a)

TRUE

b)

FALSE

6.

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.

7.

Stored up energy of motion

a)

kinetic

b)

potential

c)

mechanical

d)

energy

8.

Energy that comes from changes in the nucleus of an atom

a)

thermal

b)

kinetic

c)

electric

d)

nuclear

9.

The energy of a compound as its atoms are rearranged (such as in food or a battery)

a)

thermal

b)

mechanical

c)

kinetic

d)

chemical

10.

The energy stored in a bow right before you release the arrow is called ______________________________

a)

gravitational potential energy

b)

elastic potential energy

c)

chemical energy

d)

kinetic energy

11.

What type(s) of energy does a fridge contain?

a)

Sound Energy

b)

Thermal Energy

c)

Mechanical Energy

d)

All of the above

12.

A computer uses what type of energy to operate?

a)

Mechanical

b)

Light

c)

Electric

d)

Sound

13.

Which one represents LIGHT ENERGY?

a)

traffic light

b)

lamp

c)

light bulb

d)

flashlight

e)

all of the above

14.
Energy harnessed from the sun ( radiant light and heat)
a)
Wind Energy 
b)
Hydropower
c)
Solar Energy 
d)
Nuclear Energy
15.

Energy derived from sources that are continually replenished (e.g. wind, solar, biomass, geothermal, hydropower)

a)
Nonrenewable Energy 
b)
Renewable Energy 
c)
Energy Transformation 
d)
Electromagnetic Energy 
16.

Resources consumed by humans much faster than nature can produce (e.g. oil, natural gas) 

a)
Nonrenewable Energy 
b)
Renewable Energy 
c)
Energy Transformation 
d)
Electromagnetic Energy 
17.

What are fossil fuels?

a)

coal, oil, uranium

b)

oil, natural gas, uranium

c)

coal, oil, natural gas

d)

geothemals, coal, natural gas

18.

Generating electricity with wind power is considered "clean" energy because ___________.

a)

windmills are clean and white

b)

the windmills clean the air as they spin

c)

windmills need to be cleaned all the time

d)

windmills don't produce greenhouse gases

19.

What is the energy transformation in wind turbines?

a)

Kinetic to electrical

b)

Kinetic to heat

c)

Electric to kinetic

d)

Sound to electric

20.

What type of power plant uses the potential energy of water trapped behind a dam?

a)

nuclear power plant

b)

hydroelectric power plant

c)

solar station

d)

coal burning power plant

21.

What type of power plant uses scraps from farming, waste products and wind to generate electricity?

a)

Hydroelectric Power Plant

b)

Geothermal Power Plant

c)

Biomass Power Plant

d)

Nuclear Power Plant

22.

Which of the following is a concern about renewable energy?

a)

Many involve expensive technology.

b)

There are only specific places where they can work.

c)

We need to convince companies to switch from nonrenewable energy sources.

d)

All of the above.

23.
What is the transfer of heat by movement of liquids or gases?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
24.
What is a transfer of heat energy by electromagnetic waves?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
25.
What is the transfer of heat by direct contact?
a)
Convection
b)
Electromagnetic waves
c)
Radiation
d)
Conduction
26.
When the temperature of matter decreases the particles ...
a)
speed up and move farther apart
b)
speed up and move closer together
c)
slow down and move farther apart
d)
slow down and move closer together
27.
What is a substance that DOES conduct heat well?
a)
Conductor
b)
Insulator
c)
Convector
d)
Radiator
28.
What is a substance that does NOT conduct heat well?
a)
Conductor
b)
Insulator
c)
Convector
d)
Radiator
29.
What is the energy of the movement of particles in a substance?
a)
Potential energy
b)
Kinetic energy
c)
Thermal energy
d)
Temperature
30.
Warm air rises and the cool air sinks. This is...
a)
conduction
b)
convection
c)
radiation
31.

Boiling Water

a)

Conduction

b)

Convection

c)

Radiation

32.
You're holding hands with your best friend.  Your friend's hands are REALLY warm and yours are really cold.  After a few minutes, this has changed.  How might you explain what happened?
a)
The cold energy from your hand transferred to your friend's hand through conduction.
b)
The heat energy from your friend's hand transferred to your hand through conduction. 
c)
The cold energy from your hand transferred to your friend's hand through convection.
d)
The heat energy from your friend's hand transferred to your hand through convection.
33.
On a hot summer day, a student dropped an ice cube onto a park bench. Within minutes, the ice cube melted. Which method of heat transfer best describes the process the student observed?
a)
radiation
b)
melting
c)
conduction
d)
convection
34.
Why do we wear sweaters in cold weather?
a)
To keep cold out.
b)
To generate heat.
c)
To reduce heat loss.
d)
All of the above.
35.
If you put a metal spoon and a wooden spoon into a pot of boiling water, one will become too hot to touch.  Why?
a)
Metals conduct heat better than wood.
b)
Wood conducts heat better than metals.
c)
Metals pull in heat because heat is attracted to metals.
d)
Wood isn't as strong as metals.
36.
Warm water from the ocean moves to the north while cool waters moves to the south. This is an example of.. 
a)
Conduction
b)
Convection
c)
Radiation
37.
In energy transformations, "wasted energy" usually takes what form?
a)
heat
b)
chemical energy
c)
light
d)
sound waves
38.

Efficiency is calculated by useful energy output divided by total energy input, expressed as a percentage

a)

False

b)

True

39.
No machine in existence has 100% efficiency due to ____________________.
a)
magic
b)
friction
c)
smoke
d)
input
40.

Total energy = 200J
Useful energy = 20J

Workout the efficiency of this lightbulb.
efficiency = useful enegytotal energy in ×100efficiency\ =\ \frac{useful\ enegy}{total\ energy\ in}\ \times100  

a)

100%

b)

80%

c)

40%

d)

10%

41.

Total energy = 350J
Useful energy = 70J

Workout the efficiency of this iphoneX.
efficiency = useful energytotal energy in ×100%efficiency\ =\ \frac{useful\ energy}{total\ energy\ in}\ \times100\%  

a)

100%

b)

80%

c)

40%

d)

20%

42.

This car needs 8600J of energy to power it. If 5000J is changed into useful energy, how much energy is wasted?

a)

13600J

b)

3600J

c)

5000J

d)

8600J

43.

A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?

a)

100%

b)

7%

c)

93%

d)

95%

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