Free Printable 8th Grade 2nd Quarter Review

1.

If we dropped a plastic ball with a density of 1.25 g/ml into this cup, where would settle?

a)

In the Dawn Dish Soap

b)

Between the dish soap and water

c)

Between the dish soap and corn syrup

d)

On the top of the honey

2.

Which one of these is a chemical property?

a)

melting point

b)

boiling point

c)

color

d)

flammability

3.

Which of the following is not a chemical property?

a)

rusting

b)

boiling

c)

rotting

d)

burning

4.

Ability to rust is this type of property:

a)

Physical property

b)

Chemical property

5.

The reaction above is an ____ reaction.

a)

endothermic reaction

b)

exothermic reaction

6.

The equation above is an ____ reaction.

a)

endothermic

b)

exothermic

7.

"Stored energy" is another way of describing what energy type?

a)

Potential

b)

Electrical

c)

Kinetic

d)

Mechanical

8.

At what point does the biker have the greatest Kinetic Energy?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

9.

At what point does the biker have the greatest Potential Energy?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

10.

_______________ is the amount of matter in an object or sample.

a)

Melting Point

b)

Property

c)

Mass

d)

Boiling Point

e)

Substance

11.

When experimenting with plants to see if they grow better with or without fertilizer, a scientist uses six bean plants and one type of fertilizer. What type of variable is the fertilizer?

a)

Dependent

b)

Independent

c)

Control

d)

Compound

12.

The one factor that a scientist changes during an experiment.

a)

Controlled Variable

b)

Dependent Variable

c)

Independent Variable

13.

The variable that is measured.

a)

Controlled Variable

b)

Dependent Variable

c)

Independent Variable

14.

The factors that stay the same or are constant throughout the experiment.

a)

Controlled Variable

b)

Dependent Variable

c)

Independent Variable

15.

In a controlled experiment, how many independent variables can be tested at a time?

a)

one

b)

none

c)

two or more

d)

how ever many makes sense.

16.

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the independent variable?

a)

Dropping the same way

b)

Wing Length

c)

Amount of time it takes the helicopter to hit the floor

d)

Dropping from the same height

17.

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the dependent variable?

a)

Dropping the same way

b)

Wing Length

c)

Amount of time it takes the helicopter to hit the floor

d)

Dropping from the same height

18.

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What are two controlled variables? (Select 2 answers)

a)

Dropping the same way

b)

Wing Length

c)

Amount of time it takes the helicopter to hit the floor

d)

Dropping from the same height

19.

Cindy wanted to find out how the amount of sunlight affects the growth of plants. She placed two tomato plants in 10 inch pots with potting soil and watered them ¼ cup each day. One plant was placed under a cardboard box and one was placed in the sunlight. She measured the growth of the plant each week for three weeks.

What is the independent variable?

a)

Using the same type of plant

b)

Each plant was placed in a 10 inch pot

c)

The growth of the plant

d)

One plant is in the sunlight and the other is under a box

20.

Cindy wanted to find out how the amount of sunlight affects the growth of plants. She placed two tomato plants in 10 inch pots with potting soil and watered them ¼ cup each day. One plant was placed under a cardboard box and one was placed in the sunlight. She measured the growth of the plant each week for three weeks.

What is the dependent variable?

a)

Using the same type of plant

b)

Each plant was placed in a 10 inch pot

c)

The growth of the plant

d)

One plant is in the sunlight and the other is under a box

21.

Why does a car accelerate as it round a corner at a constant speed?

a)

Its direction changes

b)

It doesn't

c)

It slows down

d)

Its speeds up

22.

A box sliding down an inclined plane attains a velocity of 27 m/s in 3 seconds from rest. Find the acceleration (change in velocity over time).

a)

30 m/s

b)

24 m/s²

c)

9 m/s²

d)

81 km/hr

23.

A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration (change in velocity over time)?

a)

24 m/s²

b)

18 m/s²

c)

16 m/s²

d)

16 m/s

24.

What is velocity?

a)

the quickness of an object

b)

the location of an object

c)

acceleration

d)

speed in a specific direction

25.

When are you undergoing an acceleration in a car?

a)

speed up

b)

slow down

c)

make turns

d)

All of the above

26.

When two equal forces act in opposite directions on an object, they are called ______________________.

a)

frictional force

b)

balanced force

c)

centripetal force

d)

gravitational force

27.

According to Newton’s second law of motion, force is equal to mass times ______________________.

a)

inertia

b)

weight

c)

acceleration

d)

direction

28.

The picture is an example of Newton's...

a)

1st Law

b)

2nd Law

c)

3rd Law

29.

Acceleration is due to a force put on an objects mass.

a)

1st Law

b)

2nd Law

c)

3rd Law

30.

"For every action, there is an equal and opposite reaction."

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

Newton's 4th Law

31.

Any push or pull on an object.

a)

force

b)

velocity

c)

inertia

d)

momentum

32.

If 150 Joules of work is needed to move a box 10 meters, what force was used? Work = Force X Distance

a)

1500 N

b)

15 N

c)

1.5 N

d)

150 N

33.

What makes elements and compounds different from mixtures? Elements & compounds-

a)

have a constant composition (pure substances)

b)

are made of gases

c)

Will not change when heated

d)

conduct electric current

34.

In the diagrams provided, the circles of different colors represent the atoms of different elements. Which diagram represents a mixture?

a)

I

b)

II

c)

III

d)

IV

35.

Mixtures are different than pure substances because mixtures-

a)

have lower boiling points

b)

can be separated physically

c)

are less dense than pure substances

d)

contain only one type of atom

36.

DIFFERENT kinds of atoms chemically combined to form a substance are

a)

Mixture

b)

Element

c)

Compound

d)

Substance

37.

Salt is a(n)

a)

element

b)

compound

c)

mixture

38.

Which of the following is an element?

a)

Sugar

b)

Salt

c)

Water

d)

Oxygen

39.

Is sugar (C₁₂H₂₂O₁₁)an element or a compound?

a)

Element

b)

Compound

40.

An element is made up of only one kind of _____.

a)

isotope

b)

plastic

c)

atom

d)

metal

41.

Which of the following represents an element?

a)

H₂O

b)

H₂

c)

NaCl

d)

CaCO₃

42.

The moon and other satellites rotate around the earth. Identify the force that keeps these satellites in orbit.

a)

gravity

b)

friction

c)

a strong force

d)

electromagnetic force

8th Grade 2nd Quarter Review

Total questions: 42

Worksheet time: 39mins

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