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YEAR7-CHEMISTRY-REVISION-TERM 3 EXAM

Total questions: 65

Worksheet time: 45mins

Name
Class
Date
1.

When the matter is being cooled, the particles will move _____________

a)

faster

b)

static

c)

slower

d)

randomly

2.

This is arrangement for particles in ______________

a)

Gas

b)

Solid

c)

Liquid

3.

Choose the process happened when wet clothes hanging under the sunlight.

a)

melting

b)

evaporation

c)

boiling

d)

sublimation

4.

Dry ice at room temperature is examples for process ______________

a)

melting

b)

sublimation

c)

freezing

d)

condensation

5.
Matter that always fills the shape in a container, such as air.
a)

solid

b)

liquid

c)

gas

6.

Which image shows particles in a liquid?

a)

b)

c)

7.
Which of these is a property of metals?
a)
It's malleable
b)
It can't conduct electricity
c)
They are used in food
d)
It's very brittle
8.
Where are the non-metallic elements found in the periodic table?
a)
In the middle
b)
In the top rows
c)
On the left-hand side
d)
On the right-hand side
9.

When an object changes shape when struck by a hammer.

a)

luster

b)

malleable

c)

brittleness

d)

ductile

10.

The list which contains only metals is .......

a)

aluminium, copper, nitrogen

b)

iron, oxygen, hydrogen

c)

iron, silver, aluminium

d)

iron, sulphur, copper

11.

All metals are solids except

a)

Sodium

b)

Calcium

c)

Mercury

d)

Hydrogen.

12.

Metals are sonorous in nature. What is sonorous?

a)

Making into powder

b)

Drawn into wires

c)

Make sound on beating

d)

None of these

13.

Able to be drawn into wire is

a)

malleable

b)

insulator

c)

lustre

d)

ductile

14.
Metalloids _____________
a)
have no properties of metals.
b)
have no properties of nonmetals.
c)
have some properties of both metals and nonmetals.
d)
none of the above
15.

Which is the hardest material present on earth

a)

iron

b)

boron

c)

diamond

d)

grsphite

16.

Which one of the following is a good conductor of electricity?

a)

wood

b)

plastic

c)

Iron

d)

glass

17.
If a student observes a silvery solid that is malleable, good conductor, and ductile it is a...
a)
nonmetal 
b)
metal 
c)
metalloid
18.
Which type of elements are used in computer chips, lasers, and transistors?
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Metals and Metalloids
19.

Which non-metal is essential for our life?

a)

Hydrogen

b)

Oxygen

c)

Nitrogen

d)

Carbon

20.

What substance turns into gas and burns?

a)

wax vapor

b)

wick

c)

solid wax

d)

hydrogen in the air

21.
Another term for burning is
a)
Fire triangle
b)
Magnesium oxide
c)
Combustion
d)
Bustion
22.
Condensation is the change of state from _______ to ______ as a result of losing heat energy.
a)
Solid, Liquid
b)
Solid, Gas
c)
Liquid, Gas
d)
Gas, LIquid
23.

Is it acid or alkali when the pH is 4 pH

a)

Acid

b)

Alkali

c)

Neutral

24.

Lemon contains acid or alkali or neutral

a)

Acid

b)

Alkali

c)

Neutral

25.

What is an example of neutral

a)

Vinegar

b)

Water

c)

Milk

d)

Drain cleaner

26.

When you get a bee sting, what will you use to make you feel better ?

a)

Water

b)

Baking soda

c)

Milk

d)

Toothpaste

27.

What is the meaning of the above hazard warning symbol?

a)

Corrosive

b)

Explosive

c)

Toxic

d)

Radioactive

28.

Acid in soft drink:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

29.

Reaction between acid and alkali producing salt and water:

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

30.

What colour does red litmus paper turn when added to an alkali?

a)

Blue

b)

Red

c)

Green

d)

Colourless

31.

What kind of acid is present in your stomach?

a)

Sulfuric acid

b)

Hydrochloric acid

c)

Citric acid

d)

Nitric acid

32.

Which of the following indicator will show different colour in acid, neutral and alkali?

a)

Phenolphtalein

b)

Universal indicator

c)

Methyl orange

d)

Litmus paper

33.

Nitric acid + __________  →\rightarrow  Sodium nitrate + Water

a)

Aluminium oxide

b)

Magnesium hydroxide

c)

Sodium hydroxide

34.
Snow, sleet, hail, and rain are all examples of  ________________. 
a)
evaporation
b)
condensation
c)
accumulation
d)
precipitation
35.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
36.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
37.
Evaporation happens when the sun ___________ water and turns it into vapor.
a)
cools
b)
heats up
c)
freezes
d)
lights up
38.

Chlorofluorocarbons is represented by the abbreviation _________________.

a)

CFC

b)

ChFC

c)

Chl

d)

hydrocarbons

39.

The most common source of carbon monoxide comes from _____________________________.

a)

vehicles

b)

swamp gases

c)

industrial sources

d)

none of these

40.

Which of the following is an adverse health effect from air pollution?

a)

allergic reactions

b)

bronchial inflammation

c)

eye and lung irritants

d)

All of these are correct

41.
The ozone layer protects us from
a)
UV rays
b)
CFCs
c)
Increased atmospheric heat
d)
Decreased atmospheric heat
42.
The ozone layer is damaged by
a)
CFCs
b)
Increase in greenhouse gases
c)
Increased global temperatures
d)
Sulfuric and nitric acids
43.
Global warming is due to 
a)
Greenhouse gases
b)
Nitric and sulfuric acids
c)
CFCs
d)
Ozone depletion
44.
How can smog be dangerous?
a)
It smells bad
b)
People can't breath well
c)
It blocks the sun
d)
It causes skin damage
45.
A metallic element that can cause brain damage
a)
Lead
b)
Particulate matter
c)
Ground-level ozone
d)
Nitrogen oxides
46.

When a metal is shiny, we say it is ___________.

a)

lustrous

b)

malleable

c)

ductile

d)

conductive

47.

When a metal can be made into thin wires, we say it is ___________.

a)

lustrous

b)

malleable

c)

ductile

d)

conductive

48.

The property of metals that allows them to be pulled into thin wires is called ..

a)

conductivity

b)

malleability

c)

ductility

d)

luster

49.

An alloy is harder than its pure metal because the foreign atoms in the alloy

a)

increase the bond strength between the atoms.

b)

increase the empty spaces between the atoms.

c)

react with the pure metal atoms to form a compound.

d)

reduce the ability of the atoms to slide across each other.

50.

Is gold metal?

a)
No
b)
Maybe
c)
Sometimes
d)
Yes
51.

Bronze contain copper and

a)

Zinc

b)

Tin

c)

Magnesium

d)

Antimony

52.

Where is the largest amount of water on Earth located?

a)

glaciers

b)

oceans

c)

lakes

d)

streams

53.

What is a sewage treatment plant?

a)

The place where water is cleaned, filtered and tested before re-entering the water cycle.

b)

The place where water is cleaned, filtered and tested before going to our houses.

c)

The network of pipes that carry sewage (dirty water) from our houses.

d)

The place where water is bottled for drinking.

54.

What is the first step in the water treatment process?

a)

coagulation

b)

filtration and removal of debris, sand, grit, etc.

c)

flocs

d)

concentation

55.

Process used in water treatment process where water is pushed through screens, sand, gravel and coal to remove organisms and trash

a)

filtration

b)

chlorination

c)

coagulation

d)

bioreactors

56.

Which one of the following solids is insoluble in water?

a)

sugar

b)

copper sulfate

c)

sand

d)

salt

57.

What does chlorination do to the water?

a)

Removes microorganisms

b)

Removes suspended particles

c)

Removes dissolved substances

58.

What is Climate Change?

a)

long-term heating of Earth’s surface

b)

long-term sustainability in the average weather patterns

c)

long-term change in the average weather patterns

d)

Climate change and global warming are the same thing

59.

What is Global Warming?

a)

long-term heating of Earth’s surface

b)

long-term cooling of Earth’s surface

c)

long-term change in the average weather patterns

d)

global warming and climate change are the same thing

60.

What is the most abundant (most) greenhouse gas in the atmosphere?  

a)

Fluorinated gases

b)

Nitrous oxide

c)

Methane

d)

Carbon Dioxide

61.

Which of the following activities does NOT produce greenhouse gases?

a)

Gas powered transportation

b)

Burning of propane gas logs

c)

Solar Energy

d)

Coal used to generate electricity

62.
The warming of the atmosphere by the trapping of heat being radiated to space is called
a)
evaporation
b)
condensation
c)
the greenhouse effect
d)
radiation
63.
The main human activity that releases greenhouse gases is...
a)
using bottled water
b)
burning fossil fuels
c)
texting on cellphones
d)
eating meat
64.
Melting of glaciers and polar ice caps....
a)
will result in cooler temperatures in the Arctic
b)
will result in sea-levels rising
c)
Will have no effect on ecosystems
d)
None of the above
65.

What is the atmosphere?

a)

layer of dirt below the ground

b)

layer of water at the bottom of the ocean

c)

layer of air around the Earth

d)

layer of air inside a greenhouse

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