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8th Grade Science Final Review

Total questions: 135

Worksheet time: 3hrs 31mins

Name
Class
Date
1.

What is the pH range of an acid?

a)

0-14

b)

less than 7

c)

exactly 7

d)

greater than 7

2.

What is the pH range of a base?

a)

0-14

b)

less than 7

c)

exactly 7

d)

greater than 7

3.

What is the pH range of a neutral solution?

a)

0-14

b)

less than 7

c)

exactly 7

d)

greater than 7

4.

How do acids taste?

a)

Sweet

b)

Sour

c)

Salty

d)

Bitter

5.

How do bases taste?

a)

Sweet

b)

Sour

c)

Salty

d)

Bitter

6.

What type of acid is in your stomach?

a)

Battery

b)

Hydrochloric

c)

Neutral

d)

Antacid

7.

Which substance increases the number of hydroxide ions (OH-) in a solution?

a)

Acid

b)

Base

c)

Neutral

d)

Citrus

8.

Which substance increases the number of hydrogen ions (H+) in a solution?

a)

Acid

b)

Base

c)

Neutral

d)

Bleach

9.

What will an indicator tell you? (Check all that apply)

a)

Whether a substance is an acid or a base

b)

Where on the pH scale the substance will fall

c)

What color the substance is

d)

What elements are in the substance

10.

Which of these are acids? (Check all that apply)

a)

Vinegar

b)

Citrus

c)

Toilet cleaner

d)

Coca cola

11.

Which of these are bases? (Check all that apply)

a)

Baking soda

b)

Citrus

c)

Toilet cleaner

d)

Hand soap

12.

What is the term for "A scale that measures the acidity of a solution"?

a)

Indicator

b)

pH scale

c)

Balance

d)

Neutralization

13.

What is the term for "A substance that changes color in the presence of an acid or a base"?

a)

Neutral solution

b)

Alkaline

c)

Indicator

d)

Electrolyte

14.

What is the term for "The reaction between an acid and a base that yields water and often a salt"?

a)

Synthesis

b)

Neutralization

c)

Decomposition

d)

Radioactivity

15.

What is the term for "A solution with a pH greater than 7"?

a)

Acid

b)

Base

c)

Neutral solution

d)

Salt

16.

What is the term for "The gradual wearing away of a metal due to a chemical reaction in which the metal is changed into a metallic compound"?

a)

Acid

b)

Base

c)

Indication

d)

Corrosion

17.
Velocity is both ____ and _____. 
a)
speed , direction 
b)
direction, mass
c)
volume, density 
d)
direction, magnitude 
18.
The unit we use to measure acceleration is ___. 
a)
meters / second 
b)
meters 
c)
seconds 
d)
meters / second / second 
19.
Acceleration is a change in ________. 
a)
direction 
b)
speed 
c)
velocity 
d)
distance 
20.
You are walking in a straight line at a consistent speed. Do you have acceleration? 
a)
no
b)
yes 
21.
As you walk you make a right turn. Do you have acceleration? 
a)
yes 
b)
no
22.
You are walking and start to slow down. Do you have acceleration? 
a)
yes
b)
no 
23.
A negative acceleration means that your object is _____. 
a)
Going to Wal-mart 
b)
running for president 
c)
speeding up 
d)
slowing down 
24.
Which shows a distance? 
a)
10 m
b)
10 m/s
c)
10 m/s north 
d)
10 m/s squared 
25.
Which shows a velocity? 
a)
10 m
b)
10 m/s
c)
10 m/s north 
d)
10 m/s squared 
26.

speed of an object in a particular direction

a)

motion

b)

velocity

c)

speed

d)

acceleration

27.

when an object changes its position compared to a reference point.

a)

acceleration

b)

speed

c)

motion

d)

reference point

28.

total distance traveled divided by total time taken to travel that distance

a)

velocity

b)

motion

c)

acceleration

d)

average speed

29.

the rate at which speed or velocity changes

a)

acceleration

b)

average speed

c)

motion

d)

reference point

30.

an object that appears to stay in place and that helps you detect motion in another object

a)

acceleration

b)

average speed

c)

motion

d)

reference point

31.

Is this a speed or acceleration graph?

a)

speed

b)

acceleration

32.

What is happening at segment E?

a)

acceleration

b)

deceleration

c)

constant speed

d)

no motion/object at rest

33.

What is happening at segment F?

a)

acceleration

b)

deceleration

c)

constant speed

d)

no motion/object at rest

34.

What is happening at segment A?

a)

acceleration

b)

deceleration

c)

constant speed

d)

no motion/object at rest

35.

What is happening at segment B?

a)

acceleration

b)

deceleration

c)

constant speed

d)

no motion/object at rest

36.

What is happening at segment C?

a)

acceleration

b)

deceleration

c)

constant speed

d)

no motion/object at rest

37.

What is happening at segment D?

a)

acceleration

b)

deceleration

c)

constant speed

d)

no motion/object at rest

38.

Is this a speed or acceleration graph?

a)

speed

b)

acceleration

39.

What is happening at segment B?

a)

no motion/object at rest

b)

constant speed

c)

acceleration

40.

What is happening at segment A?

a)

no motion/object at rest

b)

constant speed

c)

deceleration

41.

A runner crossed the 1 mile marker of a race running at a speed of 9 miles per hour. She crossed the finish line running at a speed of 9.8 miles per hour. Did the runner change her velocity?

a)

Yes

b)

No

42.

A runner crossed the 1 mile marker of a race running at a speed of 9 miles per hour. She crossed the finish line running at a speed of 9.8 miles per hour. This is an example of...

a)

positive acceleration

b)

negative acceleration

c)

no acceleration

43.

A snake slithered across the sidewalk in between two sign posts. At the first sign post his speed was 1.2 m/s. At the second sign post his speed was 1.2 m/s. Did the snake change velocity?

a)

Yes

b)

No

44.

A snake slithered across the sidewalk in between two sign posts. At the first sign post his speed was 1.2 m/s. At the second sign post his speed was 1.2 m/s. This is an example of...

a)

positive acceleration

b)

negative acceleration

c)

no acceleration

45.

The formula for calculating speed is...(x means multiply; / means divide)

a)

time x distance

b)

distance x speed

c)

distance / time

d)

time / distance

46.

A force that opposes motion between any surfaces that are in contact.

a)

gravity

b)

acceleration

c)

friction

d)

direction

47.

Which type of friction is shown in the picture?

a)

rolling

b)

fluid

c)

static

d)

sliding

48.

Sanding wood with sandpaper will ______ the friction.

a)

increase

b)

decrease

49.

Which type of friction is shown in the picture?

a)

fluid

b)

static

c)

rolling

d)

sliding

50.

If the following objects were dropped from the same height, which one would hit the floor first?

a)
b)
c)
51.

Which type of friction is shown in the picture?

a)

rolling

b)

static

c)

fluid

d)

sliding

52.

Adding oil will ________ friction on gear chains.

a)

increase

b)

decrease

53.
What is the SI unit used to measure force? 
a)
pounds 
b)
grams 
c)
newtons 
d)
friction
54.
Gravity attracts all objects towards one another.
a)
False
b)
True
c)
It depends
55.
Any object with mass has gravity.
a)
True
b)
Sometimes
c)
False
d)
Never
56.
As distance between two objects increase the pull of gravity 
a)
Increases
b)
Decreases
c)
Stays the same
57.
The force of gravity acting on an object is the object's ______.
a)
mass
b)
matter
c)
weight 
d)
friction 
58.
The law of universal gravitation is credited to whom?
a)
Einstein
b)
Galileo
c)
Darwin
d)
Newton
59.
The amount of matter in an object is 
a)
pressure
b)
weight
c)
mass
d)
force
60.
Which of the following never changes no matter where in the universe?
a)
weight
b)
force
c)
mass
d)
pounds
61.
Which of the following never changes no matter where in the universe?
a)
weight
b)
force
c)
mass
d)
pounds
62.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
63.
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
64.
Every object in the universe attracts every other object.
a)
True
b)
False
65.
If Earth's mass was cut in half, what would happen to your weight?
a)
Increase because gravitational force increases
b)
decrease because gravitational force decreases
c)
decrease because gravitational force increases
d)
nothing, weight is not affected by gravitational force
66.
What does this tool measure?
a)
weight
b)
meters
c)
mass
d)
force
67.
Is the force of gravity on the diver a push or a pull?
a)
push
b)
pull
68.
the tendency of an object to resist a change in its motion
a)
acceleration
b)
inertia
c)
mass
d)
frame of reference
69.

Which has the MOST inertia?

a)
b)
c)
d)
70.

Objects with greater _________ also have greater inertia.

a)

speed

b)

mass

c)

force

d)

friction

71.
Because of inertia, a resting object will remain at ________.
a)
rest
b)
a constant speed
c)
school
d)
inertia 
72.
What kind(s) of objects have inertia?
a)
all objects with mass
b)
only objects at rest
c)
only objects in motion
d)
only objects whose motion is being changed
73.
You push on a car and it does not move.  What is true about the inertia?
a)
The inertia is changing
b)
The inertia of the car is too great 
c)
The inertia of the person is equal to the car
d)
There is not inertia because of no movement
74.

Motion is any change in ___________.

a)

accelration

b)

distance

c)

position

d)

velocity

75.

The law of inertia states that a body in motion will remain in motion and a body at rest will remain at rest unless acted upon by a(n) ________________ force.

a)

balanced

b)

unbalanced

c)

equal

d)

strong

76.

Which law of motion is also known as the Law of Inertia?

a)

First Law

b)

Second Law

c)

Third Law

77.

Newton's First Law says that an object that is not moving will _____.

a)

stay at rest

b)

keep moving with a constant velocity

c)

resist any physical change

d)

has mass

78.

Newton's First Law says that an object that is moving will _____.

a)

stay at rest

b)

keep moving with a constant velocity

c)

resist any physical change

d)

has mass

79.

Which of the following has more inertia?

a)

Bowling ball

b)

Tennis ball

80.

Which of the following has less inertia?

a)

Feather

b)

Hammer

81.

Which law of motion is also known as the Law of Acceleration?

a)

First Law

b)

Second Law

c)

Third Law

82.

Newton's Second Law says that an unbalanced force is applied to an object, it causes it to _____.

a)

accelerate

b)

slow down

c)

stay at rest

d)

have more mass

83.

The greater the force that is applied, the _____ the acceleration.

a)

greater

b)

lesser

84.

The less the force that is applied, the _____ the acceleration.

a)

greater

b)

lesser

85.

What equation is used to solve Newton's Second Law problems?

a)

F = ma

b)

M = Fa

c)

A = m / F

d)

F = m / a

86.

Which law of motion is also known as the Law of Action - Reaction?

a)

First Law

b)

Second Law

c)

Third Law

87.

Newton's Third Law says that every time there is an action force, there is also a reaction force that is _____ in size and acts in the _____ direction.

a)

equal, opposite

b)

opposite, equal

c)

greater, different

d)

lesser, same

88.

In Newton's Second Law equation, what does the F stand for?

a)

force

b)

friction

c)

french fries

d)

friends

89.

In Newton's Second Law equation, what does the m stand for?

a)

mass

b)

minutes

c)

measurement

d)

mountain

90.

In Newton's Second Law equation, what does the a stand for?

a)

acceleration

b)

animals

c)

atom

d)

ant

91.

Suppose Lemming A runs off the edge of the cliff at 2 m/s and Lemming B runs off the edge at 1 m/s. Which will hit the ground farther from the base of the cliff?

a)

A

b)

B

c)

Both at the same distance

92.

Suppose Lemming A runs off the edge of the cliff at 2 m/s and Lemming B runs off the edge at 1 m/s. Which will hit the ground first?

a)

A

b)

B

c)

Both at the same time

93.

As an object travels through the air, its vertical velocity

a)

changes continuously due to gravity

b)

remains the same

94.

For work to be done on an object,

a)

some force need only be exerted on the object.

b)

the object must move some distance as a result of a force.

c)

the object must move, whether or not a force is exerted on it.

d)

the object must not move.

95.

A force of 8 Newton pushes a 2 kilogram object across a level floor for 10 meters in 3 seconds.

How much work is done?

a)

160 J

b)

80 J

c)

27 J

d)

5.3 J

96.

Identical twins run up a flight of stairs. Jake takes 20 seconds, and Jordan takes 1/4 of a minute. Who did more work?

a)

equal work

b)

Jake

c)

Jordan

97.

Identical twins run up a flight of stairs. Jake takes 20 seconds, and Jordan takes 1/4 of a minute. Who had more power?

a)

equal power

b)

Jake

c)

Jordan

98.
Work divided by time equals...
a)
energy
b)
power
99.
The unit of work is the ...
a)
joule
b)
force
100.
The unit of power is the...
a)
work
b)
watt
101.
Force multiplied by distance equals...
a)
work
b)
power
102.
Work is done on an object when the object moves in the SAME direction in which the force is applied.
a)
True
b)
False
103.
If you pull at an angle instead of in the direction in which the object moves, MORE of your force does work.
a)
True
b)
False
104.
The FARTHER you move an object, the more work you do.
a)
True
b)
False
105.
The more POWER you use to move an object, the more work you do. 
a)
True
b)
False
106.
Power is the RATE at which work is done. 
a)
True
b)
False
107.

What is the definition of matter?

a)

Anything that has mass and takes up space

b)

A substance that is liquid, solid, or gas

c)

Anything that is pure

d)

Anything that you can see or hold

108.

What does the number 3 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

109.

What does the number 4 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

110.

How many Nitrogen (N) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

111.

How many Hydrogen (H) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

112.

How many total molecules is 4NH3?

a)

4

b)

1

c)

3

d)

12

113.

How many total atoms make up 4NH3?

a)

4

b)

16

c)

3

d)

12

114.

In the equation shown, what are the reactant(s)?

a)

N2 + H2

b)

NH3

115.

In the equation shown, what are the product(s)?

a)

N2 + H2

b)

NH3

116.

Is this equation balanced?

a)

Yes

b)

No

117.

Is this equation balanced?

a)

Yes

b)

No

118.

Is this equation balanced?

a)

Yes

b)

No

119.
What color of star is the hottest?
a)
Blue
b)
Red
c)
Yellow
d)
Orange
120.
What color of star is the coolest?
a)
Red
b)
Yellow
c)
Blue
d)
White
121.
What is the name of the largest stars?
a)
Protostars
b)
Supergiants
c)
Red Giants
d)
Dwarf Stars
122.
What is the name of the gas/dust clouds that form stars?
a)
Nebulas
b)
Protostars 
c)
Supernova
d)
Neutron Star
123.
What is the name of the explosion at the death of a massive star?
a)
Supergiant
b)
Supernova
c)
Black Hole
d)
Nebula
124.
What word best describes our sun?
a)
Average
b)
Supergiant
c)
Dwarf
d)
Red Giant
125.
What is the name of the star in our solar system?
a)
Venus
b)
Sun
c)
Jupiter
d)
Mars
126.
All stars begin their life in a
a)
Main Sequence
b)
Nebula
c)
Protostar
d)
Black Dwarf
127.
______ is a force that causes dust particles to stick together in a nebula.
a)
nuclear fusion
b)
gravity
c)
hydrogen
d)
friction
128.
Most stars are made of which elements?
a)
Hydrogen only
b)
Hydrogen and Lithium
c)
Hydrogen and Sodium
d)
Hydrogen and Helium
129.
A ________ is an object so dense with so much gravity that even light cannot escape.
a)
neutron star
b)
white dwarf
c)
blackhole
d)
black dwarf
130.
A supergiant might explode and become a_____.
a)
main sequence stars
b)
white dwarf
c)
supernova
d)
nebula
131.

The professional who studies the stars is...

a)

an astronaut.

b)

an astrologer.

c)

an astronomer.

132.
Why do stars in the night sky look so small?
a)
stars are small
b)
stars are close
c)
stars are far away
133.
Our galaxy is called the
a)
Earth Nebula
b)
The Hubble Galaxy
c)
The Milky Way
d)
The Snickers
134.

What will be the next stage in our star the sun's life cycle?

a)

supernova

b)

white dwarf

c)

blackhole

d)

red giant

135.
A black hole is an object so dense with so much gravity that even ________ cannot escape.
a)
gravity
b)
galaxies
c)
spaceships
d)
light

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