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8th Grade Benchmark Review

Total questions: 58

Worksheet time: 1hrs 19mins

Name
Class
Date
1.

What is the atomic number of oxygen?

a)

5

b)

Sandwich

c)

8

d)

17

2.

How many hydrogen atoms are there?

a)

1

b)

4

c)

5

d)

6

3.

4CF2Cl2

a)

C = 4, F = 4, Cl = 2

b)

C = 1, F = 8, Cl = 8

c)

C = 4, F = 8, Cl = 8

d)

C = 1, F = 4, Cl = 8

4.

What is the primary source of energy for nearly all ecosystems?

a)

The Moon

b)

The Sun

c)

Chemical reactions

d)

Decomposers

5.

Which organisms are classified as producers in an ecosystem?

a)

Bacteria and fungi

b)

Lions and tigers

c)

Rabbits and deer

d)

Plants and algae

6.

What are organisms called that can make their own food?

a)

Heterotrophs

b)

Carnivores

c)

Herbivores

d)

Autotrophs

7.

What is this model called?

a)

Food Chain

b)

Food Web

c)

Habitat

d)

Herbivore

8.

Grasses directly pass energy to...

a)

grasshopper, frog, bird

b)

mouse, rabbit, grasshopper

c)

rabbit, fox, snake

d)

frog, owl, mouse

9.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

10.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

11.

Usually solid elements that are good conductors, malleable, ductile, and shiny

a)

Metals

b)

Nonmetals

c)

Metalloids

d)

Semimetals

12.
All of these properties describe metals except...
a)
malleable
b)
conductors
c)
brittle 
d)
shiny
13.

Type of element is a semiconductor.

a)

metal

b)

nonmetal

c)

metalloid

14.
What does brittle mean?
a)
shiny
b)
able to be hammered into different shapes
c)
able to be drawn into a wire
d)
breaks or shatters easily
15.

Sulfur is considered:

a)

malleable

b)

brittle

c)

ductile

d)

a good conductor

16.

What is the sum of all forces acting on an object?

a)

Unbalanced force

b)

Net force

c)

Friction

d)

Balanced force

17.

Is this a balanced or unbalanced force?

a)

Balanced

b)

Unbalanced

18.

You and your friend are moving a couch from one side to another. You push with a force of 20 N to the right and your friend pushes with a force of 25 N to the right.

a)

5 N to the right

b)

45 N to the left

c)

45 N to the right

19.

A rocket pushes burning gases DOWN which causes the rocket to launch UP. Which law is this?

a)

Newton's 1st Law of Motion

b)

Newton's 2nd Law of Motion

c)

Newton's 3rd Law of Motion

20.

When a horse stops suddenly, the rider on its back continues to move forward onto the ground. Which law is this?

a)

Newton's 1st Law of Motion

b)

Newton's 2nd Law of Motion

c)

Newton's 3rd Law of Motion

21.
What law of motion does this picture represent?
a)
Newtons 1st law
b)
Newtons 4th law 
c)
Newtons 3rd law 
d)
Newtons 2nd law
22.

Imagine you kick four balls with the same amount of force. Which one will go the farthest?

a)

a 3 pound ball

b)

a 5 pound ball

c)

a 15 pound ball

d)

a 25 pound ball

23.

What is Newton's Second Law?

a)

The law of Inertia

b)

F= M X A

c)

M= A X P

d)

You should not speed in a car.

24.
Stored energy.
a)
Potential Energy
b)
Kinetic Energy
25.
The energy of motion.
a)
Potential Energy
b)
Kinetic Energy
26.
a)
Potential Energy
b)
Kinetic Energy
27.

A UFO flys over Houston covering 100 miles in 5 seconds. What is its average speed?

a)

50 miles/sec

b)

40 miles/sec

c)

20 miles/sec

d)

5 miles/sec

28.

What is the equation to calculate time?

a)

time = speed ÷ distance

b)

time = distance ÷ speed

c)

time = speed × distance

d)

time = distance × speed

29.
How far will a person go if they jog for 2 hours at a speed of 12 km/hr?
a)
6 km
b)
0.5 km
c)
10 km
d)
24 km
30.

Describe the motion in the graph:

a)

steady speed forward

b)

stationary (at rest)

c)

Acceleration

31.

Which person was moving the fastest?

a)

biker

b)

runner

c)

walker

32.
Velocity is both ____ and _____. 
a)
speed , direction 
b)
direction, mass
c)
volume, density 
d)
direction, magnitude 
33.

According to the graph how far does the person travel in the first 5 seconds?

a)

2 m

b)

10 m

c)

0 m

d)

5 m

34.

Identify the energy transfer

a)

electrical to chemical to light

b)

kinetic to potential

c)

chemical to electrical to light

d)

light to sound

35.

Identify the energy transfer

a)

mechanical to light

b)

chemical to kinetic

c)

electrical to mechanical

d)

kinetic to thermal

36.

Identify the energy transfer

a)

kinetic to mechamical

b)

light to thermal

c)

potential to kinetic

d)

electrical to magnetism

37.

When you eat food, your body gains ___________ energy.

a)

electrical

b)

chemical

c)

thermal

d)

light

38.

A[n] ______________ tide occurs when the sun is at right angles to the line between Earth and the moon.

a)

high

b)

neap

c)

low

d)

spring

39.

A[n] ___________ tide occurs when the sun, Earth, and the moon are in a straight line.

a)

spring

b)

high

c)

low

d)

neap

40.

Which body has the greater effect on Earth's tides?

a)

Sun

b)

Saturn

c)

Moon

d)

Venus

41.
What is a difference between spring and neap tides?
a)
Spring tides occur when the earth and sun are IN LINE with the new or full moon. 
b)
Spring tides occur when moon in 3rd or 1st quarter phases
c)
Spring tides are LOWER than neap tides
d)
Spring tides occur in Spring and neap tides can occur in any season
42.
At position A, in the Northern hemisphere it would be _____?
a)
Summer
b)
Winter
c)
Spring
d)
Fall
43.

If it is winter in the Northern Hemisphere, it is ________ in the Southern Hemisphere.

a)
Summer
b)
Winter
c)
Spring
d)
Fall
44.

At position C, in the Northern hemisphere it would be _____?

a)
Summer
b)
Winter
c)
Spring
d)
Fall
45.

Which color of stars are the hottest?

a)

Red

b)

Orange

c)

White

d)

Blue

46.

Most of the stars on the HR diagram are classified as what type of star?

a)

White Dwarfs

b)

Blue Giants

c)

Red Giants

d)

Main Sequence

47.

The Milky Way galaxy is thought to be a(n)

a)

spiral galaxy

b)

barred spiral galaxy.

c)

elliptical galaxy.

d)

irregular galaxy.

48.
A location where two tectonic plates collide is known as a _________ boundary.
a)
Convergent
b)
Divergent
c)
Transform
d)
Spreading
49.

Sea-floor spreading explains how.....

a)

new crust is created at a divergent boundary

b)

volcanoes are formed on continents

c)

deep sea trenches are formed

50.
What type of plate boundary is this?
a)
Plate
b)
Divergent
c)
Convergent
d)
Transform
51.
Hot air rises because...
a)
it is less dense
b)
it is heavier
c)
it is more dense
d)
it contains Helium
52.
According to the map, which city is likely experiencing warmer weather?
a)
Seattle
b)
Chicago
c)
Boston
d)
San Diego
53.
Which of the following is most likely a cause of hurricanes?
a)
Cooler ocean temperatures
b)
Warmer ocean temperatures
c)
Large ocean waves
d)
Strong ocean currents
54.

Water found beneath the Earth's surface is called _____.

a)

groundwater

b)

storm water

c)

surface water

d)

wastewater

55.

Which of the following can contaminate groundwater?

a)

improperly applied fertilizers and pesticides

b)

poorly designed landfills

c)

failing septic systems

d)

All the above.

56.

The sun's ________ keeps the planets in their orbits.

a)

friction

b)

gravity

c)

inertia

d)

magnetism

57.

What is another word for something that is ALIVE or was ONCE LIVING

a)

Biotic

b)

Abiotic

58.

Look at the image. Which answer choice best matches to our location in the milky way galaxy?

a)

A

b)

B

c)

C

d)

D

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