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Unit 2 Review

Total questions: 100

Worksheet time: 3hrs 31mins

Name
Class
Date
1.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
2.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
3.
Particles in an atom that are neutral and have no charge are 
a)
negatrons 
b)
electrons 
c)
neutrons 
d)
protons 
4.
If the number of protons equal the number of _____, the atom will have no charge
a)
protons
b)
neutrons
c)
electrons
d)
nucleus
5.
The subatomic particle found outside the nucleus is the
a)
atom
b)
electron
c)
proton
d)
neutron
6.
The subatomic particle with a negative charge is the
a)
electron
b)
proton
c)
neutron
d)
nucleus 
7.
The subatomic particle with a neutral charge is the
a)
electron
b)
proton
c)
neutron
d)
nucleus 
8.
What subatomic particles would you find in the nucleus of an atom?
a)
Protons only
b)
Protons and Neutrons
c)
Neutrons and Electrons
d)
Protons and Electrons 
9.
What subatomic particle is electrically neutral (no charge)?
a)
Proton
b)
Ion
c)
Neutron
d)
Electron
10.
What subatomic particle(s) would be found orbiting the nucleus?
a)
Neutrons only
b)
Electrons only
c)
Protons and Neutrons
d)
Protons and Electrons
11.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
12.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
13.
What are the 3 subatomic particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
14.
Which of the following is NOT a type of subatomic particle?
a)
plasmids
b)
proton
c)
neutron
d)
electron
15.
Which two particles are in the atomic nucleus?
a)
protons and neutrons
b)
neutrinos and electrons
c)
neutrons and ions
d)
electrons and protons
16.
What part of the atom is the arrow pointing to?
a)
electron
b)
nucleus
c)
neutron
d)
proton
17.
What part of the atom is the arrow pointing to?
a)
electron shell
b)
neutron
c)
proton
d)
electron
18.
What part of the atom is the arrow pointing to?
a)
neutron
b)
nucleus
c)
proton
d)
electron
19.
What part of the atom is the arrow pointing to?
a)
electron
b)
neutron
c)
proton
d)
electron shell
20.
_____________ holds the magnet to the refrigerator.
a)
Magnetism
b)
Pole
c)
Repel
21.
A magnet has _______ poles.
a)
1
b)
2
c)
3
d)
4
22.
The poles of a magnet are ___________ pole and ____________ pole.
a)
West and East
b)
North and South
c)
Right and Left
23.
The north pole on a magnet __________ to the south pole of the magnet.
a)
attracts
b)
repels
24.
The north pole of a magnet _________ the north pole of another magnet.
a)
attracts
b)
repels
25.

Magnetic field lines are closest together at the __________.

a)

poles

b)

lines

26.
Magnets can interact without touching.
a)
True
b)
False
27.
Magnetic field lines always cross.
a)
True
b)
False
28.
Which way will the magnets move after they are released?
a)
Towards each other
b)
Away from each other
c)
Not enough information
29.
Which picture has the most potential energy?
a)
Picture A
b)
Picture B
30.
How is energy being transferred in the scenario shown below?
a)
Potential --> Kinetic
b)
Kinetic --> Potential
c)
Kinetic --> Kinetic
d)
Neither
31.
Which of the images will show an increase in potential energy stored in the magnetic field?
a)
A
b)
B
32.
Magnetic poles that are unlike ________and magnetic poles that are alike ___________.
a)
run; stay
b)
attract; repel
c)
stay; repel
d)
repel; attract
33.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
34.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
35.
Are ALL metals magnetic?
a)
Yes
b)
No
36.
Are the magnetic field lines in the picture correct?
a)
Yes, because they point from north to south.
b)
No, because they point from north to south (they're supposed to go the other way).
c)
Yes, because the North pole is on the left in all pictures.
d)
No, because the North pole is on the left in all pictures (it's supposed to be on the right).
37.
Electrons have ___ charge. 
a)
no
b)
negative
c)
positive
38.
Protons are found...
a)
in the atom's nucleus.
b)
in the cloud around the nucleus.
39.
The girl's hair and the comb are attracting  one another.  The hair and the comb have
a)
opposite charges
b)
like charges
40.
Two things with opposite charges will
a)
attract one another.
b)
repel one another.
41.
A plastic rod is rubbed with a dry piece of cloth and the rod becomes positively charged.  The rod has …  
a)
gained electrons
b)
lost electrons
c)
gained protons
d)
lost protons
42.
If an atom has 3 protons (+++) and 4 electrons (- - - -), it has a net charge of_____.
a)
-1
b)
+1
c)
0
d)
7
43.
True or False
Like charges repel
a)
True
b)
False
44.
True or False
A positively charged object has lost electrons
a)
True
b)
False
45.
What is the major difference between static electricity and current electricity?
a)
Current electricity involves a continuous flow of neutrons; static electricity is a sudden transfer of protons
b)
Current electricity can be deadly; static electricity is almost always safe
c)
In current electricity, there's a single transfer of electrons; in static electricity, there's a steady flow of electrons
d)
Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons
46.
Ms Jo Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?
a)
The balloons will repel each other.
b)
The balloons will attract each other.
c)
The balloons will become positively (+) charged.
d)
The balloons will pop.
47.
What types of charges attract?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Positive and Negative
48.
What charge does a proton have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
49.
What charge does an electron have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
50.
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
a)
A positive charge.
b)
A negative charge.
c)
A neutral charge
d)
No charge at all
51.
What happens when you touch a metal doorknob after rubbing your shoes on the carpet?
a)
The doorknob sends a burst of electric current into your body
b)
Millions of electrons go from your finger into the doorknob
c)
The doorknob sends millions of electrons into your finger
d)
our finger becomes negatively charged
52.
Which of the following is caused by static electricity?
a)
a stove getting hot when it is turned on
b)
a magnet being attracted to a refrigerator
c)
a lightning strike during a storm
d)
a light bulb coming on when a switch is turned on
53.
What is static electricity caused by?
a)
A balance of power
b)
A balance of positive and negative charges
c)
. An imbalance of positive and negative charges
d)
An imbalance of protons and neutrons
54.
If an object has the same number of positive and negative charges, its electrical charge is...
a)
positive
b)
negative
c)
neutral or no charge
d)
opposite
55.
In a neutral atom, the number of electrons is equal to the number of _______.
a)
Neutrons
b)
Orbits
c)
Protons
d)
subatomic particles
56.
An object becomes charged when the atoms in the object gain or lose
a)
electrons
b)
protons
c)
neutrons
d)
all of the above
57.
Which of the following is NOT a situation caused by static electricity?
a)
hair stands on end when touching a static electricity generator  
b)
you get a electric shock when touching a doorknob during dry winter 
c)
your hair stands on end when you are frightened
d)
clothes in the dryer cling to one another when no fabric softener is used 
58.
The transfer of what type of atomic particle is responsible for the static charges on objects?
a)
neutrons
b)
protons
c)
electrons
d)
none of these
59.
What types of charges attract?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Positive and Negative
60.
If the two charges represented in the figure were brought near each other, they would
a)
attract each other.
b)
repel each other.
c)
cause static discharge.
d)
have no affect on each other
61.

Assume a rubber rod is rubbed against a rabbit fur and the rod gains 5 electrons. Which of the following is true?

a)

The fur lost 5 electrons

b)

the fur gained 5 electrons

c)

the fur gained 5 protons

d)

The fur lost 2 electrons

62.
Which of the following is not a good conductor of electricity?
a)
copper
b)
silver
c)
Glass
d)
aluminum
63.

After you rub a balloon on your hair, what charge does your hair have (the balloon is negatively charged afterwards)?

a)

Positive

b)

Negative

c)

Neutral

64.

After you rub a balloon on your hair, what charge does the balloon have (your hair ends up positively charged)?

a)

Positive

b)

Negative

c)

Neutral

65.
An atom loses an electron.  What type of charge does it have now?
a)
positive
b)
negative
66.

What are some ways to increase the strength of an electromagnet? (click all that apply)

a)

More coils

b)

Smaller battery

c)

Bigger battery

d)

Tighter coils

67.

How are lightning and static similar?

a)

There is a separation of charges

b)

The charges attract one another

c)

There is a temporary electrical current

d)

They are powered by magnets

68.

How are lightning and static different? (click all that apply)

a)

Only one is magnetic.

b)

They are different sizes (magnitude).

c)

Only one is naturally occurring.

d)

One can be created easily in class.

69.
Why do planets orbit the sun (and not float around in space)?
a)
the moons are keeping them in place
b)
They were hit by an asteroid
c)
they were hit by a comet
d)
the sun's gravity keeps them in place
70.
Are all things on earth affected by gravity?
a)
Yes
b)
No
71.
Which objects have a STRONG force of gravity?
a)
Objects with GREATER mass, like elephants
b)
Objects with LESS mass, like mice
72.
Which has more mass, Earth or the Moon?
a)
Earth
b)
Moon
c)
The same
73.
Which has a STRONGER force of gravity, Earth or the Moon?
a)
Earth
b)
Moon
74.
As distance between two objects increase the pull of gravity 
a)
Increases
b)
Decreases
c)
Stays the same
75.
Any object with mass has gravity.
a)
True
b)
Sometimes
c)
False
d)
Never
76.
Gravity attracts all objects towards one another.
a)
False
b)
True
c)
It depends
77.
Every object in the universe attracts every other object.
a)
True
b)
False
78.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
mass and distance 
b)
mass and matter
c)
distance and weight 
d)
weight and mass
79.
As the distance between 2 objects increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
80.
As mass increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
81.
________ hold all of the planets in orbit around the sun.
a)
gravity
b)
string
c)
Bill Nye
d)
duct tape
82.
What is the force of attraction between objects that is due to their masses and the distance between them?
a)
Gravity
b)
Centripetal Force
c)
Velocity
d)
Magnetism
83.
An example of a gravitational interaction is that the Earth. . . 
a)
orbits the Sun.
b)
orbits the moon.
84.
What is gravity?
a)
A force
b)
Energy
c)
A push
d)
All of them
85.

Which of the following forces can push (repel) and pull (attract)?

a)

Magnetic Force

b)

Electric Force

c)

Gravitational Force

d)

Both Magnetic and Electric Force.

e)

All Three, Magnetic, Electric and Gravitational Force.

86.
When two magnets repel, they ________________
a)
change color
b)
pull together
c)
push apart
d)
get colder
87.

Iron filings and bar magnets are placed on a piece of paper. Explain the pattern on the diagram below. Where is the magnetic field the strongest?

a)

The magnetic field is only strong at the north pole

b)

The magnetic field is only strong at the south pole

c)

The magnetic field is strongest at the magnet’s poles.

88.

How can you increase the strength of this electromagnet?

a)

Get a larger nail.

b)

Add more loops of wire.

c)

decrease the loops of wire.

d)

Get a smaller nail.

89.

When placed at equal distances apart, the greatest gravitational attraction will be between two

a)

skateboards

b)

bowling balls

c)

school buses

90.
What types of charges attract?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Positive and Negative
91.
Electric charges that are alike _______ each other.
a)
Attract
b)
Repel
92.

If more loops of wire are added to this electromagnet, what will happen?

a)

It will pick up 10 pins instead of 5.

b)

Nothing it will pick up the same amount of pins.

c)

It will pick up 2 pins instead of 5.

d)

It will be overloaded and pick up nothing.

93.

Which of the following data would support the claim that the gravitational force between objects depends on mass?

a)

The gravitational force gets weaker as objects get farther apart.

b)

The graviational force only pulls on objects.

c)

The gravitational force is greater on more massive planets.

d)

The graviational force is only attractive.

94.

You made an electromagnet to pick up pins. It did not pick them up until the nail was next to the pins. This is because

a)

The smaller the distance between two electromagnets the greater the force.

b)

As distance increases between two electromagnets the force becomes greater.

95.
During a lab a balloon was rubbed with a wooly fabric. This is an example of which type of charging?
a)
conduction
b)
friction
c)
induction
96.

two objects with opposite charges will move towards each other

a)

attract

b)

repel (repulsion)

c)

conduct

97.

A simple electromagnet can be made with which of the following?

a)

an electric current

b)

a turbine and nail

c)

a nail, a wire, and a battery

98.

How can the strength of an electromagnet be increased?

a)

by rubbing it with a stronger magnet

b)

by increasing the coils of wire around the iron

c)

by increasing the length of the wire from the battery

99.

Earth's magnetic field and a bar magnet attract particles to the same locations. Where are they?

a)

The middle

b)

All around the outside

c)

The north and south poles

100.

What charges can particles have? Select all that apply.

a)

positive

b)

negative

c)

foward

d)

netural

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