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Pure Substances & Mixtures 2024

Total questions: 78

Worksheet time: 39mins

Name
Class
Date
1.

Molecules are always ____________________ (with the exception of absolute zero).

a)

in motion

b)

frozen

c)

dancing

d)

arguing

2.

Molecules move _______ when thermal energy is added to a solid, liquid, or gas.

a)

freely

b)

quicker

c)

in slow motion

d)

randomly

3.

Which tool is used to measure thermal energy?

a)

oven

b)

scale

c)

thermometer

d)

discombobulator

4.

Water boils at 100 degrees on which scale?

a)

Farenheit

b)

Celsius

c)

Kelvin

d)

Newton

5.

Water freezes at what temperature?

a)

0 degrees Celsius

b)

0 degrees Fahrenheit

c)

0 degrees Kelvin

d)

0 degrees Newton

6.

This is the most widely used temperature scale. It's based on the behavior of water. It's also called Centigrade.

a)

Celsius

b)

Fahrenheit

c)

Kelvin

d)

All of them

7.

This is the name for the coldest that anything can get.

In Celsius it's -273.15 degrees. Or 0 degrees Kelvin.

a)

Really dang cold

b)

Kelvin

c)

Absolute zero

d)

Winnipeg

8.

What temperature is an oven approximately when a pizza is cooking?

a)

about 500 degrees Celsius

b)

850 Fahrenheit

c)

About 200-250 degrees Celsius

d)

I only use the microwave

9.

The hottest day ever recorded on earth was:

a)

100 degrees Celsius

b)

56.7 degrees Celsius

c)

0 degrees Fahrenheit

d)

in Winnipeg

10.

What is the temperature of a healthy human being?

a)

around 37 degrees Celsius

b)

98 degrees Celsius

c)

20 degrees Celsius

d)

250 degrees Celsius

11.

When molecules are cooled they:

a)

slow down and move closer together

b)

speed up and move closer together

c)

speed up and move further apart

d)

slow down and move further apart

12.

Which of the following would be an example of a pure substance?

a)

water

b)

V8 Vegetable Juice

c)

Cheerios

d)

The air we breathe

13.

If you put some iced tea crystals into water and made a tasty beverage, which one would be considered the solute?

a)

the entire Iced Tea beverage

b)

the Iced tea crystals

c)

the water

d)

I prefer Coke to iced tea

14.

Which of the following is true about water molecules?

a)

They are somewhat attracted to one another

b)

They repel each other

c)

They are made up of 3 hydrogen and 2 oxygen atoms

d)

In a cup of water, there are about 100 water molecules.

15.

If you made yourself a nice cup of tea, what would be the solvent?

a)

the water

b)

the tea inside the tea bag

c)

the Pepsi

d)

the fabric of the tea bag

16.

Temperature really is a measurement of:

a)

the speed that molecules move

b)

the size of molecules

c)

the tastiness of molecules

d)

the smell of molecules

17.

Why don't they use mercury inside thermometers anymore?

a)

because it is too expensive

b)

because it is a neurotoxin and bad for you

c)

They still do use mercury in most thermometers actually

d)

because it smells

18.

What is the hottest possible temperature?

a)

Whatever it is in the middle of the Sun

b)

Scientists don't believe that there is a limit on how hot something can get

c)

Inside of a black hole

d)

5 236 199 degrees Celsius

19.

Matter consisting of only one type of particle or molecule:

a)

pure substance

b)

mixture

c)

homogeneous mixture

d)

solution

20.

Matter consisting of more than one type of particle or molecule.

a)

pure substance

b)

element

c)

mixture

d)

electron

21.

Which of these is an element?

a)

Salt (NaCl)

b)

Water (H20)

c)

Oxygen (O)

d)

Carbon Dioxide (CO2)

22.

Which of these is a compound?

a)

Aluminium (Al)

b)

Carbon Dioxide (CO2)

c)

Nitrogen (N)

d)

Sand

23.

Air is:

a)

An element

b)

A compound

c)

A mixture

d)

None of these

24.

Which of the following is classified as a pure substance?

a)

Lemonade

b)

Fruit punch

c)

ketchup

d)

Helium

25.

A mixture that is uniform (all looks the same) and well mixed is _____.

a)
homogeneous
b)
hetergeneous
c)
pure substance
d)
compoud
26.
The picture shown here is what type of mixture?
a)
homogeneous
b)
hetergeneous
c)
pure substance
d)
element
27.

True or False: elements AND compounds are pure substances.

a)

True

b)

False

28.

The minor part of a solution that gets dissolved into the solvent is called the...

a)

solute

b)

pure substance

c)

salt

d)

water

29.
Name the separation method that causes wet clothes on a clothes line to dry
a)
Chromatography
b)
Filtration
c)
Distillation
d)
Evaporation
30.

Name the separation technique shown in the diagram.

a)

evaporation

b)

distillation

c)

filtration

31.

Dyes in water soluble markers may be separated by means of..

a)

crystallization

b)

sublimation

c)

chromatography

d)

sedimentation

32.
Which one of the following would you use to separate sand from iron filings?
a)
a bar magnet
b)
filter paper
c)
chromatography paper
d)
alum
33.
To separate a mixture of soil and water what separation method is used?
a)
Filtration
b)
Distillation
c)
Chromatography
d)
Evaporation
34.
To separate a mixture of salt and water what separation method is used?
a)
Filtration
b)
Distillation
c)
Chromatography
d)
Evaporation
35.
The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as
a)
decanting
b)
 evaporation
c)
loading
d)
chromatography
36.

When no more solute dissolves the solution is _________

a)

supersaturated

b)

unsaturated

c)

saturated

d)

supercalifragilisticexpialidocious

37.

The dissolving medium in a solution is called the ______________. Hint: they say water is the universal one.

a)
colloid
b)
solution
c)
solute
d)
solvent
38.

Hydrogen

a)

Hy

b)

H

c)

Hr

d)

Hn

39.
Which is the correct formula for:
one carbon (C)
two oxygen (O)
a)
CO2
b)
CO
c)
C2O
d)
2CO
40.

What is MATTER?

a)

Anything that has MASS

b)

Anything that takes up SPACE

c)

Anything that has MASS and takes up SPACE

d)

Anything that DOES NOT have mass or take up space

41.

All matter is made up of tiny _______________

a)

energy

b)

particles (atoms and molecules)

c)

bits

d)

antimatter

42.

All particles in a PURE SUBSTANCE are _________________

a)

the same

b)

different

c)

similar

43.

Particles are always moving.

a)

True

b)

False

c)

Truly False

44.

Particles at a higher temperature, move _____________ than those at a lower temperature.

a)

faster

b)

slower

45.
a)

Solid

b)

Liquid

c)

Gass

46.

These have a FIXED volume, but NOT a fixed shape, taking the shape of their container.

a)

Solid

b)

Liquid

c)

Gas

47.

What is between atoms and molecules

a)

Air

b)

Empty space

c)

Magic

d)

Gas

48.

In which state of matter will there be the LARGEST space between molecules?

a)

Solid

b)

Liquid

c)

Gas

49.
Particles in a _____________ are tightly packed together.
a)
solid
b)
liquid
c)
gas
d)
plasma
50.
As particles are exposed to warmer temperatures they __________
a)
speed up
b)
slow down
c)
stay the same
d)
vibrate
51.

When we heated a salt solution, what happened to the salt?

a)

It evaporated with the water

b)

It stayed behind in the pot

c)

It created a tiny black hole

d)

It separated into Sodium and Chlorine

52.

When we allowed sand to settle in the bottom of a beaker with water, what separation method were we using?

a)

Evaporation

b)

Distillation

c)

Chromatography

d)

Decantation

53.

When we boiled water, what happened to the temperature of the water after it reached 100 degrees Celsius?

a)

It kept going up

b)

It went up to 273 degrees Celsius

c)

It stayed at roughly 100 degrees Celsius

d)

It went down to absolute zero

54.

Which boiled at a higher temperature: water or salt water?

a)

Salt Water

b)

Water

c)

They had the exact same boiling point

d)

It was impossible to boil either

55.

Which of the following is a form of energy?

a)

heat

b)

temperature

c)

Pringles

d)

TikTok

56.
A common synthetic material that is found almost everywhere is ________.
a)
Coal
b)
Lumber
c)
Plastic
d)
Aerogel
57.
When two substances combine to form a new substance, a _____ has occurred.
a)
chemical reaction
b)
physical reaction
c)
mixture
d)
solution
58.
_______ is an example of a synthetic fabric.
a)
Wool
b)
Silk
c)
Cotton
d)
Nylon
59.
Failing to recycle plastics can lead to _________.
a)
renewable materials
b)
pollution
c)
extra bottles around the house
d)
new materials
60.
Synthetic materials are found in this food item.
a)
Gum
b)
Fruit smoothie
c)
Fresh milk
d)
Organic eggs
61.
_________ is (are) made from recycled cooking oil.
a)
Gasoline
b)
Lipstick
c)
Biodiesel
d)
Leggings
62.
During a chemical reaction, atoms are ___________.
a)
left alone
b)
left in the original molecules
c)
completely destroyed
d)
rearranged
63.
Synthetic materials are made by _________.
a)
aliens
b)
humans
c)
farmers
d)
nature
64.

Energy that is transferred from hotter substances to colder ones.

a)

heat

b)

temperature

c)

absolute zero

d)

ether

65.

The transfer of heat by the collisions of particles, usually in a solid.

a)

convection

b)

conduction

c)

radiation

d)

temperature

66.

The transfer of heat from the movement of particles from one part of a fluid (gas or liquid) to another.

a)

Convection

b)

Conduction

c)

Radiation

d)

temperature

67.

The transfer of energy by means of (electromagnetic) waves. Heat from the Sun is an example.

a)

temperature

b)

convection

c)

radiation

d)

conduction

68.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
69.
This picture represents which of the following?
a)
Element
b)
Compound
c)
Mixture
70.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
71.

When making a fruit drink from a powdered mixture, the powdered mixture is the __________

a)

solution

b)

solvent

c)

solute

d)

particle

72.
When a solvent contains as much of the solute as it can hold, the solution is said to be
a)
supersaturated
b)
diluted
c)
saturated
d)
unsaturated
73.
What are the two types of Mixtures
a)
Elements and Subatomic Particles
b)
Protons and Electrons
c)
Atoms and Compounds
d)
Homogenous and Heterogeneous
74.
Max is hungry and he prepares cereal with milk. This is an example of a: 
a)
Homogeneous mixture
b)
Heterogeneous mixture
75.

Solutions are ___________ mixtures.

a)

Solid

b)

Homogenous

c)

Heterogeneous

d)

Gas

76.

Which of these is a compound?

a)

Aluminium (Al)

b)

Carbon Dioxide (CO2)

c)

Nitrogen (N)

d)

Sand

77.
What is matter?
a)
Anything that has mass and occupies space
b)
Anything that has mass
c)
Anything that is made of air
d)
ALL of them 
78.

Which of the following is classified as a pure substance?

a)

Lemonade

b)

Fruit punch

c)

ketchup

d)

Hydrogen

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