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NC Physical Science Exam Review - Physics & Matter

Total questions: 50

Worksheet time: 2hrs 40mins

Name
Class
Date
1.

A type of mixture that forms when one substance dissolves in another is known as a

a)

heterogeneous mixture

b)

solution

c)

solute

d)

solvent

2.
What is a solvent
a)
the liquid in which a solute is dissolved to form a solution.
b)
Another word for solution
c)
A thing that make drinks turn colors
d)
Its a metal molecole
3.
If I dissolve sugar in water, what is the solute?
a)
Water
b)
Hydrogen
c)
Sugar
d)
Carbon
4.

If I dissolve carbon dioxide in water, what is the solvent?

a)

Carbon Dioxide

b)

There is no solvent

c)

Oxygen

d)

Water

5.

Which substance is least soluble at 0 ºC?

a)

KI

b)

KNO3

c)

KClO3

d)

Ce2(SO4)3

6.

At 80'C, KBr's solubility is:

a)

100

b)

90

c)

80

d)

0

7.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
8.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
9.

A base is a substance

a)

That releases OH- ions when dissolved in water

b)

That releases H+ ions when dissolved in water

c)

Does not release any ions when dissolved in water

d)

None of the above

10.

An acid

a)

is a substance that releases H+ ions when dissolved in water

b)

is a substance that does not release any ions when dissolved in water

c)

is a substance that releases OH- when dissolved in water

d)

releases an equal amount of OH- and H+ ions when dissolved in water

11.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
12.
Takes two small nuclei and combines them into a larger nucleus
a)
fission
b)
fusion
13.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
half-life
d)
gamma radiation
14.
This is an example of...
a)
Fission  reaction
b)
Fusion reaction
c)
Decomposition reaction
d)
Decay
15.

Which reaction represents fusion?

a)
b)
c)
d)
16.

Which reaction represents fission?

a)
b)
c)
d)
17.
Which nuclear emission involves the release of helium nuclei?
a)
alpha
b)
gamma
c)
positron
d)
beta
18.
Which of the following nuclear emissions involves the release of a particle with no mass and a charge of +1?
a)
proton
b)
beta
c)
positron
d)
alpha
19.
This is the symbol for a(n)
a)
alpha particle
b)
beta particle
c)
gamma particle
20.
What happens to the atomic number during alpha decay?
a)
The atomic number decreases by 4
b)
The atomic number increases by 1
c)
The atomic number decreases by 2.
d)
The atomic number stays the same.
21.

During beta decay, a nucleus ....

a)

maintains the same mass and the atomic number goes up by 1

b)

maintains the same mass and the atomic number goes down by 1

c)

The mass goes up by 1 and the atomic number remains the same

d)

The mass goes down by 1 and the atomic number remains the same

22.
What is Half-life?
a)
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
b)
The amount of time it takes for half the electrons in a sample of the isotope to decay
c)
The amount of time it takes for half the nuclei in a sample of the isotope to decay
d)
the amount of time it takes to double the nuclei in a sample of the isotope to decay
23.

After 22,800 years, approximately what percentage of the original carbon-14 remains?

a)

15%

b)

12.5%

c)

6.25%

d)

3.125%

24.
What is the half-life of iodine-131?
a)
32 days
b)
8 days
c)
16 days
d)
24 days
25.
If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.
a)
1.25mg
b)
1.25g
c)
10g
d)
10mg
26.
You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years. 
How many grams are left after 1 half life? 
a)
100 grams
b)
25 grams
c)
2 grams
d)
50 grams
27.
gravitational potential energy is defined as
a)
the energy an object has due to its height above the ground
b)
the energy an object has due to its motion
c)
the energy a spring has due to its stretch
d)
the chemical energy stored in the molecules of atoms
28.
Kinetic Energy is defined as
a)
Energy stored due to its location
b)
Energy of motion
c)
Energy stored in the bonds of molecules
d)
Heat energy
29.
A 70 kg runner has a velocity of 5 m/s. Her kinetic energy is
a)
875 J
b)
175 J
c)
1750 J
d)
350 J
30.
A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is
a)
60 J
b)
600 J
c)
17 J
d)
2.4 J
31.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?
a)
Potential Energy
b)
Kinetic Energy
c)
Nuclear Energy
d)
Chemical Energy
32.
If a toy car rolls along a sidewalk, that is level, what would cause it to lose its kinetic energy?
a)
Heat
b)
Friction
c)
Magnetism
d)
Temperature
33.

How much kinetic energy (K) does a baseball with a mass of 0.143 kg have if it is travelling at a velocity of 41.1 m/s?

HINT: K = 1/2mv2

a)

120.8 joules

b)

89.7 joules

c)

108.3 joules

d)

156.6 joules

34.

A 69 kg ski jumper jumps and reaches a heigth of 10.7 m. What potential energy does she have?

a)

None of the above

b)

7000 Joules

c)

7235 Juloes

d)

7235 Joules

35.

Power is defined as

a)

How much work is done

b)

The rate at which work is done

c)

How many things are plugged into an outlet

d)

The rate at which energy is used

36.

An engine does 300 J of work in 10 seconds. How much power did it use?

a)

3000 N

b)

3000 W

c)

30 W

d)

30 J

37.
A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 
a)
77 J
b)
7.7 J 
c)
0.7 J 
d)
770 J 
38.
Which of the following would produce the most power?
a)
A mass of 10 kilograms lifted 10 meters in 10 seconds 
b)
A mass of 10 kilograms lifted 10 meters in 5 seconds
c)
A mass of 5 kilograms lifted 10 meters in 5 seconds
d)
A mass of 5 kilograms lifted 5 meters in 10 seconds
39.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
40.

If you increase your work and decrease your time, you will have

a)

more power

b)

less power

c)

same amount of power

d)

power rating can not be determined

41.

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

a)

Person A

b)

Person B

42.

Is this an open or closed circuit?

a)

Open Circuit

b)

Closed Circuit

43.

Is this an open or closed circuit?

a)

Open Circuit

b)

Closed Circuit

44.
As the resistance of a circuit increases, the current will...
a)
increase
b)
decrease
c)
stay the same
45.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
46.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
47.
The voltage supplied to a circuit is 17 V and the current running through is 10 A. What is the power generated?
a)
170 W
b)
170 A
c)
1.7 V
d)
1.7 W
48.
What would increase the strength of an electromagnet?
a)
Increasing the amount of current flowing through the wire.
b)
Inserting a wooden core inside the coil
c)
Changing the direction of the current
d)
Decreasing the number of coils of wire
49.
If I were to try to connect the north pole of one magnet to the north pole of another magnet, the two poles would:
a)
attract
b)
repel
c)
neither
d)
flip
50.

what is electromagnetic induction

a)

when you induce magnets

b)

when you use chemicals to make science

c)

the ability to use an electrical current to create a magnetic field and vise versa

d)

the ability to use an magnetic field to create an electrical current and vise versa

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