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Grade-8 First Terminal Examination

Total questions: 30

Worksheet time: 24mins

Name
Class
Date
1.
The Nebular Theory is:
a)
A theory on how the Milky Way galaxy was formed
b)
A theory on how the universe was formed
c)
A theory on how the solar system will be destroyed
d)
A theory on how the solar system was formed
2.

Our solar system began when...

a)

The Big Bang happened

b)

an ancient star exploded around 5 billion years ago

c)

every other solar system began

d)

a huge explosion occurred 15 billion years ago

3.

Which letter in this diagram shows the nebula that was left over after an ancient star exploded?

a)

a

b)

b

c)

c

d)

d

e)

e

4.

Which best explains the cause of Earth's seasons?

a)

Earth's axis being tilted causing the sunlight angle and sunlight intensity to change as Earth orbit the Sun.

b)

Earth's axis is not tilted causing the sunlight angle and sunlight intensity to stay the same.

c)

Earth's axis being tilted causing the sunlight angle and sunlight intensity to change as Earth spins.

d)

Earth's axis being tilted causing the sunlight angle to change as Earth spins.

5.

What happens when sugar is mixed with water?

a)

The sugar and water become a new compound that can be separated by crystallization

b)

The sugar dissolves as it is a solid and can be separated by crystallization

c)

The sugar and water become a mixture that can be separated by crystallization

d)

The sugar and water become a mixture that can be separated by filtration

6.

Which physical characteristics allow you to separate SAND. Check all that applies.

a)

Dissolves

b)

Floats

c)

Magnetic

d)

Filter

7.

What is a mixture?

a)

A physical joint between two or more substances

b)

A chemical joint between two or more substances

c)

The result of a chemical reaction

d)

The result of a phase change

8.

What is the correct order for obtaining salt from a mixture of sand and salt?

a)

Dissolving in water - filtration – evaporation

b)

Evaporation - filtration - dissolving in water

c)

Filtration - dissolving in water - evaporation

d)

Dissolving in water – evaporation - filtration

9.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
10.
a)
Group 1
b)
Group 17
c)
Group 18
d)
Group 2
11.

a subatomic particle, contained in the nucleus of an atom, having the same mass as a proton but no electrical charge

a)

proton

b)

neutron

c)

electron

d)

matter

12.

The molecular formula of the compound aluminium sulphate is

a)

Al(SO4)3

b)

Al2S3

c)

Al2(SO3)3

d)

Al2(SO4)3

13.

The electronic configuration of chlorine is

a)

2,7

b)

2,8,8,7

c)

2,8,7

d)

2,7,8

14.

The valency of nitrogen is ____________.

a)

3

b)

2

c)

4

d)

1

15.

Which of the following would NOT be classified as a living thing?

a)

Protist

b)

Bacteria

c)

Virus

d)

Fungi

16.

Are fungi autotrophs or heterotrophs?

a)

Autotrophs

b)

Heterotrophs

c)

Both

d)

Neither

17.

Do fungi have chloroplast?

a)

Yes

b)

No

c)

Sometimes

18.

What class lever is a nutcracker?

a)

1st

b)

2nd

c)

3rd

19.
if a load of a lever is 100 newtons and the force you apply is 20 newtons, what is your mechanical advantage?
a)
120 N
b)
5 N
c)
2000 N
d)
80 N
20.
What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J is produced by the 1machine?
a)
0.25 J
b)
26%
c)
386%
d)
3.86 J
21.
Where would you find the largest pressure?
a)
At the bottom of the ocean
b)
At the top of Mt Everest
c)
Close to ground on the Scotch oval
d)
In a rockpool on the Great Barrier Reef
22.
As you climb up a mountain what happens to the air pressure?
a)
decreases
b)
increases
c)
stays the same
23.

Which of the following does not affect the pressure beneath the surface of a liquid?

a)

Strength of the gravitational field

b)

Area of the liquid surface

c)

Density of the liquid

d)

Depth of the liquid

24.
Why do ice cubes float in a  glass of water?
a)
the ice cubes are more dense than the water
b)
the water is more dense than the ice cubes
c)
the water is more dense than the glass
d)
the ice is more dense than the glass
25.
Mercury is a metal that is liquid at room temperature and has a density of 13.5 g/cm3.  Which of these metals would sink below the mercury if dropped into a container of mercury?
a)
gold (density=19.3 g/cm3)
b)
lead (density=11.4 g/cm3)
c)
iron (density=7.9g/cm3)
d)
aluminum (density=2.7g/cm3)
26.

Which equipment is used to measure mass?

a)

triple beam balance

b)

ruler

c)

graduated cylinder

d)

thermometer

27.
What is mass?
a)
the distance between two points
b)
the amount of matter (stuff) in an object
c)
the amount of space an object takes up
d)
the distance between three points
28.
What is the formula for DENSITY?
a)
D=M*V
b)
D=M/V
c)
D=V*M
d)
D=V/M
29.

The most reactive metal

a)

Sodium

b)

Lithium

c)

Magnesium

d)

Francium

30.

Select the phrase that identifies where METALS are found on the periodic table

a)

on the zig-zag line

b)

on the right of the zig-zag line

c)

on the left of the zig-zag line

d)

on the left and right sides of the zig-zag line

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