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8th grade science test

Total questions: 31

Worksheet time: 23mins

Name
Class
Date
1.

All matter is made of _________.

a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
2.
The positively charged particles of an atom are the ________.
a)
electrons
b)
protons
c)
neutrons
d)
protons & neutrons
3.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
4.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
5.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
6.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
7.

What is the unit used for force?

a)

kilogram

b)

Newton

c)

meters

d)

Joule

8.

Force is a -

a)

push or pull

b)

only a push

c)

only a pull

d)

none of the above

9.
How much force is needed to accelerate a 25kg bowling ball at 2m/s2. 
a)
50N
b)
5N
c)
12.5N
d)
100N
10.

What kind of energy is being shown in the picture?

a)

Light

b)

Gravitational

c)

Potential

d)

Kinetic

11.

The rock has kinetic energy.

a)

True

b)

False

12.

Which position has the most potential energy?

a)

1

b)

2

c)

3

d)

4

13.
What does the rotation of the earth cause us to experience?
a)
seasons
b)
year
c)
day & night
d)
eclipse
14.
Equinox means - 
a)
Equal night and day
b)
Longest day
c)
Shortest day
d)
Tilt
15.

An imaginary line that passes through the North and South poles

a)

hemisphere

b)

equator

c)

axis

d)

rotation

16.
What is this phase?
a)

New Moon

b)

Crescent

c)

Quarter

d)

Gibbous

e)

Full Moon

17.

About how long does it take for the moon to go from new moon to full moon?

a)

1 day

b)

7 days

c)

14 days

d)

1 month

18.

What phase of the moon is shown in the picture?

a)

first quarter

b)

new moon

c)

full moon

d)

last quarter

19.

Using the HR diagram, choose the color of Zeta Eridani

a)

blue

b)

white

c)

yellow

d)

red

20.
Which category is our Sun located in?
a)

White Dwarfs

b)

Supergiants

c)

Main Sequence

d)

Giants

21.

The movement of tectonic plates is due to ____?

a)

convection currents in the mantle

b)

seafloor spreading

22.

Two of Earth's plates pressed together for millions of years. What happened?

a)

The oceanic plate was pushed downward

b)

The continental plate was pushed downward.

23.

Cold air is denser than warm air, so it sinks. What kind of pressure area does this create?

a)

Dense pressure

b)

High pressure

c)

Low pressure

d)

No pressure

24.

What kind of weather is associated with high air pressure?

a)

Clouds and rain

b)

Clouds without rain

c)

Clear skies

d)

Tornadoes

25.
Temperature, light, air, water, and soil are all  _____  parts of the environment
a)
alive
b)
biotic 
c)
abiotic
d)
living
26.
Is sunlight an abiotic or biotic factor? 
a)
abiotic
b)
biotic
27.
_______ factors are all living things located within an ecosystem.
a)
biotic
b)
abitotic
c)
biome
d)
niche
28.
An organism that cannot adapt to changes in the environment will most likely - 
a)
produce more offspring
b)
die
c)
change its traits to survive
d)
store more food
29.
All of the following are examples of environmental changes that can be caused by humans except - 
a)
clearing land for housing developments
b)
pesticides
c)
volcanic eruption
d)
pollution
30.
Heart, blood vessels, blood
a)
Digestive system
b)
Excretory system
c)
Circulatory system
d)
Immune system
31.

What is the net force acting on the object?

a)

20 N Right

b)

40 N Right

c)

20 N Left

d)

40 N Left

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