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Science Review SA 2

Total questions: 75

Worksheet time: 1hrs 2mins

Name
Class
Date
1.

What kind of change occurs if matter changes in amount, size, or shape?

a)

substance change

b)

chemical change

c)

physical change

d)

elemental change

2.

A gel ice pack getting cold after you put it in the freezer for an hour.

a)

Chemical Change

b)

Physical Change

3.
Using dye to change the color of a shirt green.
a)

Chemical Change

b)

Physical Change

4.
Blue liquid and yellow liquid mixed to make a green liquid
a)

Chemical Change

b)

Physical Change

5.
Glass bottle that is shattered
a)
Chemical Change
b)
Physical Change
6.

Frying eggs

a)

Physical

b)

Chemical

7.

A firework display

a)

Physical

b)

Chemical

8.

Food digestion

a)

Physical

b)

Chemical

9.

The water cycle

a)

Physical

b)

Chemical

10.

Burning wood

a)

Physical

b)

Chemical

11.

What is the main property of the scales of fish?

a)

smooth

b)

rough

c)

stretchy

d)

rigid

12.

Which is the main property of eggs?

a)

absorbent

b)

bendy

c)

smooth

d)

rigid

13.

Which is the main property of plastic straws?

a)

absorbent

b)

bendy

c)

rough

d)

see-through

14.

Which is the main property of braille?

a)

smooth

b)

soft

c)

rough

d)

bendy

15.

Which is the main property of a raincoat?

a)

shiny

b)

rough

c)

waterproof

d)

waterpruf

16.
What is A?
a)
Evaporation
b)
Condensation
c)
Precipitation
d)
Runoff
17.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
18.
What is B?
a)
Evaporation
b)
Condensation
c)
Precipitation
d)
Runoff
19.

Precipitation means...

a)

water vapor cooling to form clouds

b)

water running downhill

c)

water falling from the sky

d)

water heating up and rising as gas

20.

Condensation means...

a)

water vapor cooling to form clouds

b)

water running downhill

c)

water falling from the sky

d)

water heating up and rising as gas

21.

Plants use ____________ to make their own food

a)

Water

b)

Sunlight

c)

Carbon dioxide

d)

All of these

22.

Which gas do plants release, that humans depend on for survival?

a)

Water

b)

Carbon Dioxide

c)

Oxygen

d)

Sugar

23.

How do plants affect the air that animals and people breathe?

a)

Plants use oxygen from the air to make their own food

b)

Plants release pollution into the air

c)

Plants take in carbon dioxide and release oxygen

d)

Plants take in oxygen and release carbon dioxide

24.
Why does cutting down trees increase global warming?
a)
trees soak up carbon dioxide
b)
trees provide shade which counteracts global warming
c)
trees absorbs the sun's energy without radiating back into the atmosphere
d)
trees drain greenhouse gases like methane from soil
25.

Why is burning fossil fuels harmful?

a)

they cause cancer

b)

They can get extremely hot

c)

it increases the amount of carbon dioxode/greenhouse gases in the air

d)

this would destroy fossils

26.

Which organisms are aquatic plants?

a)

Crabs

b)

Phytoplankton

c)

Fish

d)

Zooplankton

27.

How are phytoplankton similar to trees?

a)

Both are at the top of the food chain

b)

Both conduct photosynthesis

c)

Both grow in soil

d)

Both are about the same size

28.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
29.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
30.
What is evaporation?
a)
The part of the water cycle when the sun heats up water, turning it from a liquid into water vapor or steam. It rises from the ground into the air.
b)
The part of the water cycle when the water vapor in the air gets cold. The water turns back into a liquid and forms clouds.
c)
The part of the water cycle when clouds get heavy and can no longer hold the liquid water. This causes the water to fall from the sky to the earth as rain, snow, sleet, or hail.
31.
When water condenses, the water vapor in the air gets ___________ and changes back into liquid.
a)
cold
b)
hot
c)
warm
d)
solid
32.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
33.

The gravitational force exerted by an object depends on its

a)

volume

b)

mass

c)

weight

34.

Why do we have a stronger gravitational attraction with Earth than the Sun?

a)

the sun has a larger mass

b)

the Earth has a larger mass

c)

we are closer to center of sun

d)

we are closer to center of Earth

35.
What does the strength of gravity between two objects depend upon?
a)
Mass & distance
b)
Mass & weight
c)
Gravity & inertia
d)
Inertia & mass
36.

The gravitational force between two objects changes with the distance between the two objects

a)

True

b)

False

37.
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
38.

Ways to reduce frictional force

a)

use lubricants

b)

use grease

c)

use magnesium carbonate chalk powder

d)

use rollers and ball bearings

39.

The use of lubricants in motor vehicles ______________

the excessive frictional force in the engine

compartment.

a)

reduces

b)

increases

c)

reuses

d)

enlarge

40.

The larger the surface area of the moving object, the ___________ air resistance there is.

a)

Less

b)

More

c)

Longer

d)

Quicker

41.

Air resistance pushes against falling

objects and __________________.

a)

Speeds them up

b)

Keeps them afloat

c)

Slows them down

d)

Spins them

42.

Air resistance is a force caused by...

a)

Water pushing against moving objects

b)

Air pushing against moving objects

c)

Gravity pushing against moving objects

d)

Normal force pushing against moving objects

43.

When dropped from the same distance, which will fall to the floor faster?

a)
b)
44.

When plants convert the sun's energy into food, which type of energy is it?

a)

kinetic

b)

chemical

c)

heat

d)

electrical

45.

What kind of energy is represented in this picture?

a)

Heat

b)

Potential

c)

Nuclear

d)

Electrical

46.

A battery converts what type of energy to another?

a)

sound to kinetic

b)

light to heat

c)

kinetic to electrical

d)

chemical to electrical

47.
This type of potential energy depends on an object's height and mass
a)
gravitational potential energy
b)
kinetic potential energy
c)
elastic potential energy
d)
nuclear potential energy
48.
What form of energy is represented by a rock sitting at the top of a cliff?
a)
Electrical 
b)
Chemical 
c)
Elastic 
d)
Gravitational 
49.

Name the energy conversion that occurs when Charlie rides his skateboard up to the top of the ramp. (Look closely to where the arrow is pointing.)

a)

Chemical → Gravitational

b)

Electrical → Light

c)

Gravitational → Elastic

d)

Heat → Electrical

50.

Name the Energy Conversion of a dryer.

a)

Chemical→ Thermal and Light

b)

Electrical → Elastic, Heat and Sound

c)

Gravitational → Nuclear, Sound and Heat

d)

Electrical → Heat, Kinetic and Sound

51.

What is quality ?

a)

heavy

b)

heat resistant

c)

flexible

d)

rough

52.
Metals are brittle.
a)
true
b)
false
53.
Which statement is true?
a)
stone is conductive
b)
stone is light
c)
stone is heat resistant
d)
stone is soft
54.

John filled a beaker with water and dropped a ball into it. He was able to see the water and the ball through the beaker clearly.


Which of the following explains his observation?

a)

The beaker is waterproof.

b)

The beaker is strong enough to hold both the water and ball.

c)

The beaker allows light to pass through it.

d)

The beaker is flexible.

55.
a)
Electric Shock Risk
b)
Do not touch
c)
Trip hazard
d)
Watch your head
56.
a)
Heavy
b)
Low temperature
c)
Laser Radiation
d)
Flammable Material
57.
a)
Please wash your hand
b)
poison
c)
No mobile phones
d)
Wear safety footwear
58.

What is meaning of this sign?

a)

biohazard

b)

poisonous

c)

flammable

d)

corrosive

59.

Which of the following is a example of physical change ?

a)

burning of wood

b)

photosynthesis

c)

melting of ice-cream

d)

ripening of fruit

60.

What does the picture represent ?

a)

physical change

b)

chemical change

61.

Choose the picture that shows chemical change.

a)
b)
c)
d)
62.

A chemical change may involve

a)

Evolution of gas

b)

Change in temperature

c)

Change in colour

d)

All of the above

63.

What method can we use to separate materials of different sizes?

a)

Filtering

b)

Sieving

c)

Evaporating

d)

Decanting

64.

Which of the following is an example of insoluble material?

a)

Salt and water

b)

Sugar and water

c)

Flour and water

d)

Coffee and water

65.

What energy source do we need to evaporate a liquid?

a)

Electricity

b)

Heat

c)

Light

d)

Gas

66.

How could you speed up the process of dissolving?

a)

Use more water

b)

Use warmer water

c)

Use more salt

d)

Use colder water

67.

Which of these is a reversible / physical change?

a)

Melting chocolate

b)

Baking cakes

c)

Burning wood

d)

Cutting paper

68.
The change of state from a gas to a liquid
a)
condensation
b)
deposition
c)
evaporation
d)
sublimation
69.

The change in state from liquid to gas is called

a)

evaporation

b)

sublimation

c)

condensation

d)

deposition

70.

Both boiling and evaporation are forms of vaporization. What is the difference between them?

a)

Boiling liquids have intense heat added to it, evaporating liquids take heat from their environment.

b)

Boiling happens quickly, evaporation happens slowly.

c)

Evaporation occurs only at a liquid's surface, boiling occurs throughout the liquid

d)

All of these reasons

71.

....... and ...... are used for burning natural gas

(a)  

72.

When we taking medicine, we should follow the instruction on the ........ Medicine contains .................. which can be harmful to our health when taken in wrong amount. Taking more medicine than what is necessary may cause..................

(a)  

73.

The process of separating an insoluble solid from a liquid from a liquid by pouring away the liquid and leaving behind the solid is called (a)  

74.

Steam is water vapour at .............. point or at temperatures higher than ................ point

(a)  

75.

When a gas loses heat, it ........................ and changes into a ...............................

(a)  

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