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SCIENCE REVISION GRADE 3

Total questions: 77

Worksheet time: 47mins

Name
Class
Date
1.
What are 2 factors that determine the amount of friction between 2 objects?
a)
Force and roughness between surfaces
b)
hills and valleys and how smooth or rough the surface is
c)
Amount of force and amount of surface the comes in contact
d)
The force and the weight exerted on the surfaces
2.
The amount of friction depends on the weight of the objects pressing together.
a)
True
b)
False
3.
 What is the unit called that measures force?
a)
weight
b)
meter
c)
Newton
d)
kilogram
4.
Rougher surfaces have ...
a)
greater friction
b)
less friction
c)
the same level of friction
5.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
6.

The picture shows a boy pulling

a box. How can he move the box

more easily?

a)

Using wooden rollers.

b)

Put a cloth under the box and pull it using the cloth.

c)

Create a pattern on the surface of the box.

d)

Ensure the surface of the box is clean.

7.

Ways to reduce frictional force

a)

use lubricants

b)

use grease

c)

use magnesium carbonate chalk powder

d)

use rollers and ball bearings

8.

If the type of surface is smoother, the distance traveled by the toy car will be (a)  

9.

The frictional force (a)   caused the boy to fall.

10.

The use of lubricants in motor vehicles ______________

the excessive frictional force in the engine

compartment.

a)

reduces

b)

increases

c)

reuses

d)

enlarge

11.
What is Pitch?
a)
How loud or soft a sound is
b)
muscle that holds vocal cords
c)
movement back and forth
d)
how high or low a sound is
12.
How does sound travel?
a)
Sounds travels in waves
b)
sound travels slow
c)
sound travels fast
d)
sound doesn't travel
13.
What is volume?
a)
How high or low a sounds is
b)
reflected sound that comes back and is repeated
c)
how loud or soft sound is
d)
movement back and forth
14.
What do waves look like when they're high sounding?
a)
They're long
b)
They're short
15.
What do sound waves look like when they're low?
a)
They're long
b)
they're short
16.
What is a larynx?
a)
It is animal is Africa
b)
It is sound waves
c)
It is a a muscle that holds vocal cords
17.
The rate in which sound waves occur is?
a)
vibration
b)
echo
c)
frequency
18.
What is vibration?
a)
the rate at which sound waves occur
b)
movement back and forth
c)
how high or low a sound is
19.
Sound travels fastest through...
a)
gas
b)
liquid
c)
solids/metals
d)
space
20.
Sounds travels slowest through...
a)
space
b)
solids/metals
c)
gas
d)
liquids
21.
Why can't we hear sound in space?
a)
can't take our helmet off to hear
b)
Space has no mass / no gas/ solids/ liquids
c)
because it's dark
d)
Don't know, I've never been to space
22.
What happens when we hear an echo?
a)
We know there is danger
b)
there must be someone yelling back to us
c)
Sound is reflected off a surface and repeated back
d)
sounds waves are traveling really fast
23.
Why do we see lightning before we hear the thunder?
a)
Our eyes trick us
b)
Light travels faster than sound
c)
they're two separate things
24.
What happens to our hearing if we listen to loud noises all the time?
a)
We appreciate music better
b)
we get a ringing in our ears
c)
we start to experience hearing loss
25.
How can we protect our ears from hearing loss?
a)
wear ear plugs
b)
put our fingers in our ears
c)
Try not to listen to loud things
d)
All of the above
26.

There are 2 sources of materials; natural and hand-made.

a)

True

b)

False

27.

The examples of the materials come from the plants are...

a)

wool, rubber, wood

b)

leather, silk, rubber

c)

rubber, wood, cotton

d)

wool, cotton, metals.

28.

The examples of materials come from grounds are gold, tin and rubber.

a)

True

b)

False

29.

We can make woolen balls from the silk.

a)

True

b)

False

30.

The examples of materials that come from animals are

a)

rubber

b)

feather

c)

wood

d)

leather

e)

gold

31.

Plastics, steel and ceramics are the examples of man-made materials.

a)

True

b)

False

32.

The examples of plastics are

a)
b)
c)
d)
e)
33.

Natural materials come from ____

a)

animal, plants, ground

b)

plants, factory, ground

c)

animal, plants, factory

34.

Which material does come from the ground?

a)
b)
c)
35.

Which object is made from natural material?

a)
b)
c)
36.

Brick is made from ____

a)

Clay

b)

Sand

c)

Metal

37.

Which material is a natural material?

a)

ceramic

b)

nylon

c)

wool

d)

steel

38.

Which objects below is made from rubber?

a)
b)
c)
39.

Look at the picture! The material for make the object in the picture is?

a)

plastic

b)

wood

c)

glass

40.
The top layer of sediments in a sedimentary rocks is...
a)
The newest and youngest layer.
b)
The oldest layer.
c)
The only layer that is made from pebbles.
d)
The second layer of sediments.
41.
If an igneous rock cools off slowly UNDERNEATH the Earth's surface, then its mineral crystals will be...
a)
Small mineral crystals that you can barely see.
b)
Large crystals that are easy to see.
c)
No crystals, it will have bits of plant and bones.
d)
No crystals, it will contain sand. 
42.
Which of the following are associated with volcanoes?
a)
Sediments and soil
b)
Crystals and sand
c)
Magma and lava
d)
Mica and granite
43.
Which of the following is technically not a sediment?
a)
Bits of sand
b)
Crushed pieces of bone
c)
Shells
d)
Tiny pieces of dried leaves
44.
The way a mineral splits is called?
a)
hardness
b)
layers
c)
bands
d)
cleavage
45.
A __________ is a natural, nonliving substance that makes up rocks. 
a)
Sedimentary rock
b)
Igneous Rock
c)
Mineral
d)
Sediment
46.
How does an intrusive igneous rock form?
a)
The deep ocean cools and hardens the rock.
b)
The rock cools and hardens deep below Earth's surface.
c)
The rock cools on land after a volcano erupts.
d)
The air cools the rock on land when lava flows down a volcano.
47.
The way a mineral reflects light describes which of the following?
a)
Cleavage
b)
Streak
c)
Luster
d)
Hardness
48.
Which of the following words relates to sedimentary rocks?
a)
Magma
b)
Cement
c)
Luster
d)
Heat
49.
What word describes a streak test?
a)
Fractured
b)
Powdered
c)
Scratched
d)
Liquid
50.

Which of the following is not a type of soil?

a)

minerals

b)

clay

c)

topsoil

d)

sand

51.

Weathering is......

a)

rocks, grass, and mud.

b)

the breakdown of rocks into smaller pieces

c)

the breakdown of wind, rain, and friction

d)

the weather outside

52.

The organic matter in soil is....

a)

humus

b)

bits of rock

c)

minerals

d)

all of the above

53.

The four main ingredients of soil are....

a)

wind, water, ice, and humus

b)

water, air, rocks, and humus

c)

worms, ice, rocks, and air

d)

water, air, rocks, and worms

54.

Decomposition is......

a)

nature's way of recycling.

b)

the breaking down of once living plants and animals.

c)

decaying

d)

all of the above

55.

What soil is best for growing plants?

a)

clay

b)

sand

c)

mud

d)

topsoil

56.

All of the following processes help form topsoil except...

a)

movement of oceans

b)

decay of plants

c)

weathering of rocks

d)

decomposition of animals

57.

Soil is only dirt.

a)

true

b)

false

58.

Depending on how soil is formed, it's color can be....

a)

yellow

b)

red

c)

black

d)

all of the above

59.

The main causes of weathering are all of the following except...

a)

sun

b)

water

c)

ice

d)

wind

60.

Which of the following is not a type of soil?

a)

minerals

b)

clay

c)

topsoil

d)

sand

61.

Weathering is......

a)

rocks, grass, and mud.

b)

the breakdown of rocks into smaller pieces

c)

the breakdown of wind, rain, and friction

d)

the weather outside

62.

The organic matter in soil is....

a)

humus

b)

bits of rock

c)

minerals

d)

all of the above

63.

The four main ingredients of soil are....

a)

wind, water, ice, and humus

b)

water, air, rocks, and humus

c)

worms, ice, rocks, and air

d)

water, air, rocks, and worms

64.

Decomposition is......

a)

nature's way of recycling.

b)

the breaking down of once living plants and animals.

c)

decaying

d)

all of the above

65.

What soil is best for growing plants?

a)

clay

b)

sand

c)

mud

d)

topsoil

66.

All of the following processes help form topsoil except...

a)

movement of oceans

b)

decay of plants

c)

weathering of rocks

d)

decomposition of animals

67.

Soil is only dirt.

a)

true

b)

false

68.

Depending on how soil is formed, it's color can be....

a)

yellow

b)

red

c)

black

d)

all of the above

69.

The main causes of weathering are all of the following except...

a)

sun

b)

water

c)

ice

d)

wind

70.

What is this material?

a)

cloth

b)

Metal

c)

plastic

d)

Paper

71.

What is this material?

a)

cloth

b)

metal

c)

plastic

d)

paper

72.

What is this material?

a)

cloth

b)

metal

c)

plastic

d)

paper

73.

What is this material?

a)

cloth

b)

metal

c)

plastic

d)

paper

74.

What is this material?

a)

cloth

b)

metal

c)

plastic

d)

paper

75.

What is this material?

a)

cloth

b)

metal

c)

plastic

d)

paper

76.

What is this material?

a)

cloth

b)

metal

c)

plastic

d)

paper

77.

What is this material?

a)

cloth

b)

metal

c)

plastic

d)

paper

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