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Energy Conservation & Transfer (Make-up Test #4)

Total questions: 56

Worksheet time: 5hrs 40mins

Name
Class
Date
1.
Which material is the best conductor of heat?
a)
glass
b)
styrofoam
c)
metal
d)
wood
2.
What materials would be good insulators for a handle on a pan or pot that would be used on the stove?
a)
wood or plastic
b)
metal or rubber
c)
wood or rubber
d)
copper or steel
3.
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.
4.
Conduction can only occur between two objects when –
a)
one object is less dense than the other.
b)
both objects are in physical contact with each other.
c)
one of the objects is made of a metal.
d)
both objects are exactly the same temperature.
5.
The particles of a gas move ____than the particles of the same substance in the liquid or solid state.
a)
faster
b)
slower
c)
same speed
6.
Which of the following are kinds of heat transfer.
a)
Conduction
b)
Convection
c)
Radiation
d)
All of the above
7.

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.

8.
Radiation is heat transfer by-
a)
Touch
b)
Circles
c)
Waves
9.
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  
10.
A change from one form of energy to another is called ___________.
a)
work
b)
power
c)
mechanical
d)
energy transformations
11.
According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?
a)
The total amount of energy is conserved
b)
The total amount of energy is less after a reaction
c)
The total amount of energy is more after a reaction
12.
Power is defined as the
a)
force on an object times the distance the object moves.
b)
force on an object divided by the time the force acts.
c)
work done times the time taken to do that work.
d)
work done on an object divided by the time to do the work
13.
What energy transformation occurs from a light bulb? 
a)
Electrical energy = kinetic energy + potential energy 
b)
Electrical energy = electrical energy 
c)
Electrical energy = chemical energy 
d)
Electrical energy = light energy + thermal energy 
14.

What force causes a roller coaster cart to slow down the most?

a)

friction

b)

weight

c)

gravity

d)

air resistance

15.
Which of the following best describes the energy transfer that takes place when you use a battery?
a)
Chemical PE -> Electrical
b)
Electrical -> Chemical PE
c)
Nuclear PE -> Electrical
d)
Electrical -> Nuclear PE
16.
Energy is the ability _____________.
a)
to do work
b)
to power things
c)
to move objects
d)
to turn on a light
17.

Is this an example of work?

a)

Yes

b)

No

18.

Is this an example of work?

a)

Yes

b)

No!

19.

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 Joules

d)

.67 Joules

20.

You exert 200 J of work by pulling on an object with 20 N of force. What distance is the object moved?

a)

.01 m

b)

10 m

c)

10 J

d)

4,000 m

21.
Two examples of a pulley...
a)
knife & axe blade
b)
lightbulb & screw
c)
flagpole hoist & window blinds
d)
catapult & teeter totter
22.
Which of the following does a simple machine do?
a)
allows the users to apply less force over a longer distance
b)
reduce the amount of force needed to do work
c)
change the direction of the applied force
d)
all of the above
23.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)
a mother pushes a stroller up a ramp
d)
a girl eats a sandwich
24.
The mechanical advantage of this inclined plane is.....
a)
2.4
b)
3.4
c)
4.4
25.

Which is an example of someone using a simple machine to do work?

a)

A boy runs across the field

b)

A girl eats her sandwich

c)

A banker counts money

d)

A man pushes his trolley up the ramp

26.

How can the lever be balanced?

a)

Add weight to the right side

b)

Move fulcrum right

c)

Add weight to the left side

d)

Move the heavier weight back

27.
What do waves carry from place to place?
a)
Energy, but not matter or particles
b)
Energy and matter or particles
c)
Matter or particles but not energy
d)
Neither energy nor matter or particles
28.
What are the parts of a longitudinal wave?
a)
Compressions and rarefactions
b)
Crests and troughs
c)
Compressions and crests
d)
Rarefactions and troughs
29.
Which wave is pictured?
a)
Transverse
b)
Longitudinal
c)
Both
d)
Neither
30.
Sound is an example of which type of wave?
a)
Transverse
b)
Longitudinal
c)
Both
d)
Neither
31.
Which is the wavelength?
a)
1
b)
2
c)
3
d)
4
32.
Wave __________ is the number of complete waves that pass a given point in a certain amount of time.
a)
Frequency
b)
Wavelength
c)
Amplitude
d)
Compression
33.
the maximum distance that the particles of the medium carrying the wave  move away from their rest position
a)
frequency
b)
wavelength
c)
hertz
d)
amplitude
34.
Speed = wavelength x frequency
The speed of a wave on a rope is 50 cm/s and its wavelength is 10 cm. What is the wave's frequency?
a)
50 cm/s
b)
5 Hz
c)
10 cm
35.
a)
Diffraction
b)
Interference
36.
a)
Reflection
b)
Refraction
37.
a)
Constructive Interference
b)
Destructive Interference
38.
a)
Refraction
b)
Reflection
39.
wood is a _____?
a)
conductor
b)
insulator
40.
brass is a _____?
a)
insulator
b)
conductor
41.
In an electrical circuit, electrons move from the __________.
a)
Negative pole to negative pole
b)
Negative pole to positive pole
c)
Positive pole to positive pole
42.
How many volts are in a circuit with a battery that has a resistance of 10 Ohms and a current of 2 Amps? 
a)
.5 Volts
b)
5 Volts
c)
20 Volts
43.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
44.
What resistance is needed to cause a 20A current flow because of a 100V battery?
a)
0.2Ώ
b)
2000Ώ
c)
120Ώ
d)
5Ώ
45.

What voltage is needed to cause a 50A current flow through a 10Ω resistor?

a)

15V

b)

500V

c)

500 kV

d)

0.2V

46.
As the distance between two magnets increases (they get farther apart), the force between them:
a)
Increases
b)
Decreases
c)
Stays the Same
47.
If you cut a magnet in half, what happens to the poles?
a)
One half gets the North Pole, the other half gets the South Pole
b)
Both halves get only a North Pole
c)
Both halves get only a South Pole
d)
Both halves get a North pole and a South Pole
48.
If you place the North pole of a magnet next to the South pole of another magnet, they will:
a)
Attract
b)
Repel
c)
Do nothing
d)
Shatter
49.
Two south poles will...
a)
attract
b)
repel 
50.
Magnets that are arranged like this will _______. 
a)
move away from each other (repel)
b)
move towards each other (attract)
51.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
magnetite
d)
iron
52.
GLASS
Magnetic or Non-Magnetic?
a)
magnetic
b)
non-magnetic
53.
NICKEL
Magnetic or
Non-Magnetic?
a)
magnetic
b)
non-magnetic
54.
a)

one N and one S

b)

both N

c)

both S

d)

each piece still has a N and S

55.

What is electric current?

a)

A flow of electric charges.

b)

static electricity.

c)

two objects repelling from each other.

d)

batteries.

56.

Rubbing a balloon on a wool jumper can cause a build up of static electricity, this occurs because...

a)

protons prefer to be present on the balloon surface

b)

electricity is moving from one charged surface to another

c)

wool jumpers are good conductors of electricity

d)

friction between the two surfaces causes electrons to build up on one side

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