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Year 6 Unit 3 Material Change

Total questions: 133

Worksheet time: 1hrs 17mins

Name
Class
Date
1.

In a chemical change, new substances are formed, for example

a)

heating glass and bending it

b)

melting an ice

c)

burning of wood

d)

boil water

2.

which of following are irreversible changes? Tick (v) 2 Boxes

a)

boiling an egg

b)

freezing ice cream

c)

pour viegar on baking soda

d)

boiling water

3.

Raw egg to fried egg is an example of _____________.

a)

chemical changes

b)

physical changes

c)

freezing

d)

biological changes

4.
An example of a mixture is 
a)
Water and oil
b)
Cereal and Milk 
c)
Sand and water 
d)
All of the above
5.
What is a mixture?
a)
A chemical combination of two or more different substances.
b)
A physical combination of two or more different substances.
c)
A chemically pure substance.
d)
A special type of solution
6.
A fruit salad is a 
a)
solution
b)
mixture
7.
The air around was is  a mixture of gases.
a)
True
b)
False
8.
Is  blood a mixture?
a)
No
b)
Yes
9.

Which of these is a mixture?

a)

Laundry Detergent

b)

Salt (NaCl)

c)

Oxygen (O)

d)

Fluorine (Fl)

10.
What is an example of a mixture?
a)
iron
b)
ice
c)
soil
d)
gold
11.
A mixture can be separated into its components. 
a)
True
b)
False
12.
Which of the following is a pure substance? 
a)
Water
b)
Sugar
c)
Wood
d)
ALL of them
13.
A pure substance CAN'T BE separated physically. 
a)
True
b)
False
14.

Mixing salt and sugar form a substance.

a)

false

b)

true

15.

The changes of water into ice are_

a)

reversible

b)

irreversible

16.

Burning a match into a black substance called carbon is __

a)

irreversible

b)

reversible

17.

The substances in a mixture that are chemically joined can be separated.

a)

false

b)

true

18.

Burning wood on a fire:

a)

Reversible change

b)

Irreversible change

19.

Ice melting and refreezing is:

a)

A reversible change

b)

An irreversible change

20.

A material or piece of equipment with holes in it that will only allow substances of a certain size to go through the holes.

a)

Windpipe

b)

Stomach

c)

Sieve

d)

Circuit

21.

Rice and flour mixture can be separated by:

a)

Sorting

b)

Sieving

22.

It cannot be separated by by sieving or sorting:

a)

Rice and flour

b)

Salt and sand

c)

Bean and marbles

d)

Tea leaves and sugar

23.

A cake mixture is ___________

a)

reversible

b)

irreversible

24.

Melting of an ice-cube is ____________.

a)

reversible

b)

irreversible

25.

No new substance is formed in a/an ____________ change.

a)

reversible

b)

irreversible

26.

sand in water

a)

solution

b)

colloid

c)

suspension

d)

alloy

27.

snow globe

a)

solution

b)

suspension

c)

alloy

d)

colloid

28.

In this beaker there is some sand floating in water, but most of the sand has settled at the bottom. This would be best described as

a)

A solution

b)

A colloid

c)

A suspension

d)

A compound

29.

A mixture that looks clear contains _________ substance.

a)

soluble

b)

insoluble

30.

A dissolved substance like salt can be seen in a mixture.

a)

true

b)

false

31.

flour

a)

soluble

b)

insoluble

32.

A substance in the mixture that you can see float or sink at is ______________.

a)

soluble

b)

insoluble

33.

pepper

a)

soluble

b)

insoluble

34.

tea leaves

a)

soluble

b)

insoluble

35.

rice grains

a)

soluble

b)

insoluble

36.

baking powder

a)

soluble

b)

insoluble

37.

instant coffee (3 in 1coffee mix)

a)

soluble

b)

insoluble

38.

The word DISSOLVE meaning________

a)

When a substance, often a solid, mixes with a liquid and becomes part of the liquid

b)

When a substance, often a solid, do not mixes with a liquid and becomes part of the liquid

c)

none of the above

d)

both of the above

39.

The word "INSOLUBLE" meaning ________

a)

Something which dissolve in water/liquid

b)

Something which cannot dissolve in water/liquid

c)

none

d)

both

40.

A cloudy mixture of insoluble solid particles in a liquid

a)

Solution

b)

Suspension

c)

None

41.

If you mix sand with water you will get a ______?

a)

Solution

b)

Suspension

c)

A cloudy mixture of insoluble solid particles in a liquid

d)

A clear mixture of soluble solid particles in a liquid

42.

What is filtration?

a)

A method used to separate a solid from a liquid that dissolves in the liquid

b)

A separating technique used to separate a mixture of a solid and liquid where the solid does not dissolve in the liquid

43.

Th components of filtration are separated based on

a)

boiling point

b)

solubility

c)

particle size

44.

In making tea, which of these techniques is used to separate the tea leaves from the water?

a)

Filtration

b)

Distillation

c)

Evaporation

d)

Hand picking

45.

is used to separate mixtures with different sizes

a)

MAGNETIC SEPARATION

b)

MANUAL PICKING

c)

DECANTATION

d)

SIEVING

e)

FILTERING

46.

In nature wetlands such as marshes and swamps do not filter the water.

a)

true

b)

false

47.

Which birds have filters in their beaks to catch food like algae and small fish.

a)

swan

b)

flamingo

c)

ducks

d)

none

48.

Seawater is not a solution

a)

false

b)

true

49.

The substance that dissolves is called

a)

solute

b)

solvent

50.

The liquid which is used to dissolve a substance is called

a)

solute

b)

solvent

51.

The solute cant be seen after it has dissolved because

a)

solute particles move between the solvent particles

b)

solute particles evaporate into the air

c)

solute particles crystalizes

d)

solute changes colour same as the solvent

52.

When you cannot see the solute particles in the solvent we say the solution has a

a)

uniform appearance

b)

camouflage appearance

c)

disappearing appearance

d)

vanishing appearance

53.

We can separate mixtures because the particles are not chemically joined together.

a)

true

b)

false

54.

A pure substance consists of

a)

only particles of that substance

b)

mix of 2 types of particles

c)

mix of 3 types of particles

d)

mix of 4 types of particles

55.

Powder for a cool drink is a

a)

mixture

b)

pure substance

56.

Sugar is a

a)

pure substance

b)

mixture

57.

Seawater is a

a)

solute

b)

solvent

c)

solution

58.

A solute will dissolve faster because the particles spread out into the spaces between the solvent__

a)

more quickly

b)

slower

c)

further

d)

closer

59.

Stirring __ the rate a solute dissolves

a)

increases

b)

decreases

60.

When a solute dissolves, the particles__ in the solvent.

a)

stick together

b)

spread out

61.

Increasing the temperature of a substance allows the solute to spread through the solutions__

a)

more easily

b)

more difficult

c)

no change

62.

Particles of the solute move faster in a cooler solvent than a heated solvent.

a)

false

b)

true

63.

Which are pure substances?

a)

salt

b)

water

c)

sugar

d)

baking soda

64.

In a chemical change, new substances are formed, for example

a)

heating glass and bending it

b)

melting an ice

c)

burning of wood

d)

boil water

65.

Rainwater falls through the cave dissolving some rock to come out of the solution forming these dripstones.

a)

true

b)

false

66.

Rainwater cannot dissolve some types of rock.

a)

false

b)

true

67.

__ affects the rate of a solute dissolving in a liquid

a)

grain size of a solute

b)

stirring a solution faster

c)

heating a solution

d)

cooling a solution

e)

none

68.

Larger grains of a solute dissolve faster than smaller grains

a)

true

b)

false

69.

After popcorn kernels popped into popcorn, is this a reversible change?

a)

no

b)

yes

70.

Mixing jelly powder with water. Which is the solute?

a)

jelly powder

b)

water

71.

Mixing jelly powder with water. Which is the solvent?

a)

jelly powder

b)

water

72.
Which of the following would dissolve the slowest?
a)
a sugar cube in hot water
b)
a sugar cube in cool water
c)
powdered sugar in cool water
d)
powdered sugar in hot water
73.

Stirring the solution...

a)

decrease the rate of solubility

b)

Doesn't change the rate of solubility

c)

increase the rate of solubility

d)

None of the above

74.

When you measure how fast a solute dissolves, you are measuring the

a)

amount of dissolving

b)

rate of particle movement

c)

amount of particle movement

d)

rate of solubility

75.

The smaller the particle size results in a....

a)

increase in solubility

b)

decrease in solubility

c)

decrease in surface area

d)

increase in bond strength

76.

Select the 3 properties that affect the rate of dissolving materials

a)

surface area

b)

volume

c)

temperature

d)

texture

e)

stirring

77.
Look at the diagram. In this diagram, the red dots represent
a)
the solute
b)
the solvent
c)
the solution
78.

to spread out evenly in a liquid

a)

Evaporation

b)

Dissolve

c)

Magnetic

d)

Solute

79.

material with very tiny holes that blocks solid or larger particles but allows gas, liquid, or small grains to pass through

a)

Filter

b)

Magnet

c)

Tweezers

d)

Beaker

80.

a change to matter in which no new kinds of matter are formed; ex: mixture

a)

Chemical Change

b)

Flammability

c)

Physical change

d)

Substance

81.

The figure shows a tool that is used to separate certain types of mixtures. This type of tool is best used to separate what type of mixture?

a)

a mixture that is a solution

b)

a mixture that is partly magnetic

c)

a mixture of particles that have different sizes

d)

a mixture of particles that are all about the same size

82.

The pot contains a mixture. The method shown in the picture can be used to separate what type of mixture?

a)

a solution, such as salt water

b)

a mixture of particles with different densities

c)

a mixture of particles of different sizes, such as seashells and sand

d)

a mixture of steel, which is magnetic, and aluminum, which is not magnetic

83.

Reggie has a sample of raw sugar made up of large particles and a sample of white sugar made up of much smaller particles. He dissolved 1 tsp of each sample in 1 cup of water. Which dissolved faster?

a)

Both dissolved at the same rate.

b)

The white sugar dissolved slowly, and the raw sugar dissolved quickly

c)

The white sugar dissolved quickly, and the raw sugar dissolved slowly.

d)

The white sugar dissolved quickly, and the raw sugar did not dissolve.

84.

A student is pouring milk on his cereal.


Which of the following best explains what he is making?

a)

He is making a mixture because the properties change.

b)

He is making a solution because he is pouring a liquid.

c)

He is making a mixture because the substances can be separated.

d)

He is making a solution because the substances can be separated.

85.

A student performed an investigation in which she dissolved sugar in water. She was asked to model what happened in this process. She drew the diagram above to show what she observed.


What does she need to do to model what happened to the sugar?

a)

Show that the sugar mixed completely with the water.

b)

Show that the sugar evaporated and went into the air.

c)

Show that the sugar melted and turned into water.

d)

Show that the sugar disappeared and was no longer there.

86.

How do you test to see if something is soluble?

a)

put it in the microwave

b)

take it outside

c)

shake it

d)

put the substance in water

87.

What occurs when a solid substance dissolves in a liquid?

a)

It sinks to the bottom.

b)

It floats on top.

c)

It breaks down and becomes part of the liquid substance.

88.

What happens when an insoluble substance is mixed with water?

a)

It needs to be shaken up and then it will dissolve in the water.

b)

It will remain solid and not dissolve.

c)

It becomes clear.

89.

Say whether this change is reversible or irreversible:

melting butter in a hot pan

a)

reversible

b)

irreversible

90.

Say whether this change is reversible or irreversible:

baking a cake

a)

reversible

b)

irreversible

91.

Say whether this change is reversible or irreversible:

dissolving salt in water

a)

reversible

b)

irreversible

92.

Say whether this change is reversible or irreversible:

burning wood on a fire

a)

reversible

b)

irreversible

93.

Say whether this change is reversible or irreversible:

rusting on a tin can

a)

reversible

b)

irreversible

94.

Say whether this change is reversible or irreversible:

making a paper plane from a folded sheet of paper

a)

reversible

b)

irreversible

95.

Say whether this change is reversible or irreversible:

a chocolate bar melting in your pocket

a)

reversible

b)

irreversible

96.

Say whether this change is reversible or irreversible:

water freezing to become ice

a)

reversible

b)

irreversible

97.

A mixture is made up of one substance.

a)

true

b)

false

98.

A mixture is made up of more than one one substance.

a)

true

b)

false

99.

An example of a mixture is marbles and sand.

a)

true

b)

false

100.

An example of a mixture is salt

a)

true

b)

false

101.

Mixtures can be separated.

a)

true

b)

false

102.

No new substances are made when different substances are mixed together.

a)

true

b)

false

103.

When a solid mixes with a liquid and becomes part of the liquid it___

a)

dissolves

b)

soluble

c)

insoluble

104.

A solid that dissolves in a liquid is __

a)

dissolves

b)

soluble

c)

insoluble

105.

A solid that does not dissolve in a liquid is __

a)

dissolves

b)

soluble

c)

insoluble

106.

Which mixture/s contained soluble substances?

a)

Mixture A

b)

Mixture B

c)

Mixture C

107.

Which mixture/s contained insoluble substances?

a)

Mixture A

b)

Mixture B

c)

Mixture C

108.

What is this method for cleaning water called?

(a)  

109.

A mixture is a liquid that can be separated into different substances.

a)

true

b)

false

110.

Which factor that affects dissolving is being tested?

a)

stirring

b)

amount of solvent

c)

air temperatures

d)

beaker size

e)

amount of solute

111.

Which factors are the same in both beakers?

a)

stirring

b)

amount of solvent

c)

amount of solute

d)

beakers

112.

Which factors are the different in both beakers?

a)

stirrer

b)

amount of solvent

c)

amount of solute

d)

beakers

113.

Which beaker is the control?

a)

beaker with the stirrer

b)

beaker without the stirrer

114.

Will this be a fair test?

a)

yes

b)

no

115.

For a fair test

a)

more than one factor can change

b)

one factor only can change

116.

Which factor that affects dissolving did they investigate?

a)

size of solute

b)

time to dissolve

c)

amount of solvent

d)

types of sugar

117.

The smaller the solute

a)

the shorter it takes to dissolve

b)

the longer it takes to dissolve

118.

Sugar particles move slowly and collide less in cold water.

a)

true

b)

false

119.

Water boiling is a/an__ change

a)

reversible

b)

irreversible

c)

insoluble

d)

suspension

e)

pure

120.

Sugar dissolved in tea is an example of a __ and a __

a)

solution

b)

mixture

c)

insoluble

d)

suspension

e)

pure

121.

We can use a __ to separate a mixture of gravel and sand

a)

sieve

b)

filter

c)

insoluble

d)

suspension

e)

pure

122.

Chalk is __ in water

a)

soluble

b)

insoluble

123.

A mixture of flour and water is cloudy because it is a __

a)

mixture

b)

solvent

c)

uniform

d)

suspension

e)

pure

124.

We cannot see sugar dissolved in tea as the tea has a __ appearance

a)

filter

b)

soluble

c)

uniform

d)

suspension

e)

pure

125.

Tea is not a mixture

a)

false

b)

true

126.

Which method of separation is best for separating mixtures of: peanuts and beans

a)

sorting

b)

sieving

127.

Which method of separation is best for separating mixtures of: salt and breadcrumbs

a)

sorting

b)

sieving

128.

Which method of separation is best for separating mixtures of: peas and flour

a)

sorting

b)

sieving

129.

What happened to the solids in the cloudy mixture?

a)

they do not mix

b)

they dissolve

130.

You can separate the solid and liquid in a solution by filtering.

a)

false

b)

true

131.

Filtering a mixture of flour and water, the flour will be left because the solution is colloid

a)

true

b)

false

132.

In a colloid solution, the particles are suspended.

a)

true

b)

false

133.

Heating a liquid is a way of determining the liquid is a mixture or pure substance.

a)

true

b)

false

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