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Year 8 Chemistry Exam Revision

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

Which is NOT one of the three states of matter?

a)

gas

b)

lava

c)

solid

d)

liquid

2.

All matter is made up of

a)

very large particles

b)

solids that cannot be crushed

c)

very small particles

d)

energised atoms

3.

The missing word in the blue box is

a)

melting

b)

evaporating

c)

freezing

d)

sublimating

4.

The missing word in the blue box is

a)

melting

b)

freezing

c)

sublimation

d)

condensation

5.

The missing word in the blue box is

a)

melting

b)

freezing

c)

condensation

d)

evaporation

6.

Evaporation is when ice changes into water:

a)

TRUE

b)

FALSE

7.

Heating increases the speed of particles and cooling slows them down:

a)

TRUE

b)

FALSE

8.

The state of matter at point 1 is a ___________

a)

solid

b)

liquid

c)

gas

d)

all of the above

9.

The state of matter at point 5 is a ____________

a)

solid

b)

liquid

c)

gas

d)

all of the above

10.

What change of state occurs at point 4?

a)

solid to liquid

b)

liquid to gas

c)

gas to liquid

d)

liquid to solid

11.

Is the image a heating curve or cooling curve?

a)

heating

b)

cooling

12.

Ice will float because maximum density is achieved at 4 degrees Celsius, after which the density decreases

a)

TRUE

b)

FALSE

13.

Which state of matter has the lowest density?

a)

solid

b)

liquid

c)

gas

14.

A cup full of ice and water will not overflow when the ice melts:

a)

TRUE

b)

FALSE

15.

Why should you not fill up your water bottle to the top when freezing it?

a)

The water volume will shrink

b)

The water volume will expand

c)

The water volume will stay the same

16.

Which is the least dense?

a)

hot water

b)

cold water

17.

The tendency of water particles to stick together at the top of a full glass is an example of:

a)

strong attachment

b)

diffusion

c)

surface tension

d)

sublimation

18.

When mixing the same amount of water and alcohol together, the final volume will ______________

a)

increase

b)

decrease

c)

stay the same

19.

When you push down the handle of a bike pump, and block the end, the air volume__________ and the air pressure __________:

a)

increases, increases

b)

increases, decreases

c)

decreases, increases

d)

decreases, decreases

20.

Particles move ______ when heat energy is applied

a)

faster

b)

slower

21.

A hot air balloon works because

a)

hot air rises, some air escapes, and the density decreases

b)

hot air sinks, no air escapes, and the density increases

c)

hot air rises, no air escapes, and the density decreases

d)

hot air sinks, some air escapes, and the density increases

22.

Diffusion is the net movement of particles from an area of ______ concentration to _______ concentration

a)

low, high

b)

high, low

23.

Dissolving is defined as the___________

a)

the movement of particles from an area of high concentration to low concentration

b)

the breaking apart of solute molecules by the solvent molecules, and forcing apart

24.

If the temperature of water is increased, the solubility of sugar will ________

a)

increase

b)

decrease

25.

The evaporation of sea water will result in an _______ in salinity

a)

increase

b)

decrease

26.

Water is a ________

a)

atom

b)

element

c)

compound

27.

Two joined atoms that are identical results in a

a)

element

b)

compound

28.

Mixtures occur when two or more different substances are combined but no chemical reaction occurs:

a)

TRUE

b)

FALSE

29.

Which of the following is NOT an atom of CuSO4?

a)

sulfur

b)

sodium

c)

copper

d)

oxygen

30.

On the periodic table, C is

a)

carbon dioxide

b)

calcium

c)

carbon

d)

chlorine

31.

On the periodic table, Fe is

a)

copper

b)

sulfur

c)

iron

d)

potassium

32.

Which of the following is NOT one of the three main groups of elements?

a)

metals

b)

non-metals

c)

noble gases

d)

metalloid

33.

On the periodic table, Au is

a)

mercury

b)

gold

c)

silver

d)

copper

34.

At room temperature, metals are usually

a)

solid

b)

liquid or gas

35.

Which of the following is NOT one of the three components of an atom?

a)

proton

b)

neutron

c)

charge

d)

electron

36.

All atoms contain an equal amount of _______

a)

protons and neutrons

b)

protons and electrons

c)

electrons and neutrons

37.

The atomic number is also equal to the number of ____

a)

electrons

b)

neutrons

c)

protons

38.

The mass number is the ______

a)

sum of protons + electrons

b)

sum of protons + neutrons

c)

sum of electrons + neutrons

39.

Atoms with no overall electrical charge are ______

a)

positive

b)

negative

c)

neutral

40.

The image is an electron configuration of which element?

a)

Boron

b)

Sulfur

c)

Hydrogen

d)

Carbon

41.

How many electrons should be drawn on the blank electron configuration for the element Titanium?

a)

20

b)

21

c)

22

d)

23

42.

For the compound NaHCO3, how many atoms of oxygen are present?

a)

1

b)

2

c)

3

d)

4

43.

Which of the following is NOT always a good indication that a chemical reaction has taken place?

a)

change in temperature

b)

change in state

c)

change in colour

d)

release of energy (heat, sound)

44.

Chemical reactions are often ______ to reverse

a)

easy

b)

difficult

45.

The new substances formed in a chemical reactions are called ________

a)

reactants

b)

products

46.

The PRODUCT of the reaction in the image is:

a)

magnesium

b)

chlorine

c)

magnesium chloride

47.

AgNO3 is called ________

a)

copper nitrate

b)

sulfur dioxide

c)

hydrogen peroxide

d)

silver nitrate

48.

Which of the following is NOT a gas produced during the Hofmann Voltameter test?

a)

carbon dioxide

b)

hydrogen

c)

oxygen

49.

What is the missing gas produced in this chemical reaction?

a)

oxygen

b)

carbon dioxide

c)

hydrogen

d)

hydroxide

50.

Challenge Q: KNO3 is called

a)

potassium hydroxide

b)

nitric acid

c)

potassium nitrate

d)

water