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Worksheets

Y8 Science

Total questions: 174

Worksheet time: 2hrs 33mins

Name
Class
Date
1.

Asexual reproduction needs

a)

sperm cells and egg cells

b)

two parents

c)

only one parent

d)

no parents

2.

Strawberry plants can reproduce using

a)

runners

b)

sprinters

c)

joggers

d)

walkers

3.

In fertilisation:

a)

a fertilised egg cell grows into an embryo

b)

a male and a female gamete fuse

c)

male gametes are produced

d)

a plants grows in some animal droppings

4.

On the diagram, the part labelled A is the

a)

stigma

b)

style

c)

ovary

d)

anther

5.

In a flower, the anther

a)

receives pollen grains

b)

makes pollen grains

c)

makes nectar

d)

contains the egg cells

6.

If self-pollination occurs

a)

the offspring will not have variety

b)

offspring can never be produced

c)

a plant will die

d)

the bees will die

7.

The seeds inside an apple are dispersed by

a)

the wind

b)

insects

c)

animals that eat them

d)

being carried on the fur of animals

8.

Why is seed dispersal important?

a)

so that plants can reproduce asexually

b)

so that plants can reproduce sexually

c)

so that offspring do not compete with their parents

d)

so that animals have something to eat

9.

Which of these resources is always needed for germination?

a)

water

b)

light

c)

carbon dioxide

d)

nitrogen

10.

The raw materials for photosynthesis are

a)

water and oxygen

b)

oxygen and glucose

c)

carbon dioxide and water

d)

glucose and water

11.

What is released during respiration?

a)

energy

b)

food

c)

air

d)

glucose

12.

Respiration is aerobic if it requires

a)

carbon dioxide

b)

energy

c)

oxygen

d)

lungs

13.

Which of these is a correct word equation for respiration?

a)

glucose + oxygen → carbon dioxide + water

b)

carbon + dioxygen → glucose + oxygen

c)

glucose → energy

d)

oxygen + carbon → carbon dioxide

14.

The main difference between combustion and aerobic respiration is that

a)

only combustion releases energy by heating

b)

only respiration produces carbon dioxide

c)

only respiration produces water

d)

combustion is much faster

15.

On the diagram, the part labelled with the letter X is the

a)

blood vessel

b)

oesophagus

c)

trachea

d)

bronchus

16.

During gas exchange in the lungs, there is an overall diffusion of

a)

carbon dioxide into the lung and oxygen into the blood

b)

oxygen into the lung and carbon dioxide into the blood

c)

oxygen and carbon dioxide into the blood

d)

oxygen and carbon dioxide into the lung

17.

During inhalation, rib and diaphragm muscles

a)

contract to increase the pressure inside the lungs

b)

relax to reduce the pressure inside the lungs

c)

contract to reduce the pressure inside the lungs

d)

relax to increase the pressure inside the lungs

18.

Dust is prevented from getting into the lungs by a layer of mucus, which is swept away by

a)

alveoli

b)

cilia

c)

filaments

d)

flagella

19.

When carbon dioxide is added to limewater:

a)

the limewater turns from cloudy to clear

b)

the limewater turns from clear to cloudy

c)

the limewater turns green

d)

nothing happens

20.

Which organ do fish use for gas exchange?

a)

lungs

b)

skin

c)

gills

d)

mouth

21.

Which substance does anaerobic respiration in humans produce?

a)

water

b)

lactic acid

c)

carbon dioxide

d)

carbon monoxide

22.

A fuel is:

a)

a substance formed from living organisms that lived a long time ago

b)

a substance that explodes

c)

a substance that contains hydrocarbons

d)

a substance that transfers energy usefully, usually by heating

23.

When hydrogen reacts with oxygen, the product is

a)

water

b)

oxide

c)

carbon dioxide

d)

hydrogen

24.

The products of combustion of a hydrocarbon are

a)

hydrogen + oxygen

b)

carbon dioxide + water

c)

carbon dioxide + hydrogen

d)

carbon + water

25.

When zinc burns in oxygen it forms:

a)

water

b)

zinc hydroxide

c)

zinc carbonate

d)

zinc oxide

26.

When 4.8 g of magnesium reacts with 3.2 g of oxygen, how much magnesium oxide is formed

a)

1.6 g

b)

4.9 g

c)

7.0 g

d)

8.0 g

27.

What happens in an exothermic reaction?

a)

Energy is released that increases the temperature of the surroundings

b)

Energy is taken in from the surroundings, reducing the temperature

c)

The reacting substances always explode

d)

You need to heat a substance or substances to get a reaction to occur

28.

Name two pollutants that may be formed when fossil fuels are burnt in a vehicle engine

a)

carbon dioxide and sulfur

b)

sulfur dioxide and water

c)

nitrogen oxides and sulfur

d)

nitrogen oxides and sulfur dioxide

29.

What does global warming mean?

a)

The warming effect of the Sun on the Earth

b)

The natural warming effect caused by greenhouse gases in the atmosphere

c)

The additional warming effect caused by increasing amounts of carbon dioxide in the air

d)

The way the climate is changing as a result of more carbon dioxide in the air

30.

Which description explains how carbon dioxide helps to cause the greenhouse effect?

a)

It blocks energy from the Sun from reaching the Earth’s surface

b)

It absorbs energy emitted from the Earth’s surface and re-emits it out into space

c)

It absorbs energy emitted from the Earth’s surface so that it doesn’t get any warmer

d)

It absorbs energy emitted from the Earth’s surface and re-emits it back to the surface

31.

Which of these diagrams shows the particles in a compound?

a)

A

b)

B

c)

C

d)

D

32.

Which of the following always happens during a chemical reaction?

a)

Compounds react and split up into free atoms.

b)

Elements join together to make new elements

c)

Atoms are broken down into smaller particles

d)

The atoms in the reactants are rearranged to make the products

33.

1 Which two elements in the periodic table below would have the most similar chemical properties?1&

a)

1 & 4

b)

2 & 3

c)

1 & 6

d)

5 & 6

34.

Which of the following describes a group 1 element?

a)

a very reactive metal

b)

a very unreactive metal

c)

a very reactive non-metal

d)

a very unreactive non-metal

35.

Which list contains three typical properties of non-metals?

a)

good conductor of heat, brittle,

low melting point

b)

good conductor of electricity, strong, high melting point

c)

poor conductor of heat, strong,

high melting point

d)

poor conductor of electricity, weak,

low melting point

36.

Why do solids expand when they are heated?

a)

The particles get bigger

b)

The particles vibrate more and take up more space

c)

The particles vibrate more and get closer together

d)

The particles stick together

37.

Density is:

a)

the weight of a fixed mass of something

b)

the volume of a fixed weight of something

c)

the weight of a fixed volume of something

d)

the mass of a fixed volume of something

38.

When liquid water changes into steam it is

a)

evaporating

b)

condensing

c)

melting

d)

dissolving

39.

The pressure in liquids and gases is caused by

a)

the particles pressing down

b)

the particles pushing up

c)

the particles moving sideways

d)

the particles moving in all directions and colliding with things

40.

Which of these forces is the upthrust?

a)

A

b)

B

c)

C

d)

D

41.

Why does a hot air balloon float in air?

a)

Air is less dense than water

b)

The density of hot air is less than the density of cold air

c)

Air is denser on cold days

d)

The overall density of the balloon and its basket is less than the density of the air

42.

The air resistance of a car can be reduced by

a)

making the car bigger

b)

giving it a streamlined shape

c)

making the car heavier

d)

putting a roof box on it

43.

Air resistance on a moving object is caused by

a)

air being attracted to the object

b)

air particles hitting or moving around the object

c)

the wind

d)

air pressure

44.

What are the units for measuring energy?

a)

newtons

b)

degrees Celsius

c)

joules

d)

degrees Fahrenheit

45.

The amount of thermal energy in an object depends on three things. Which of these things does it not depend on?

a)

Its mass

b)

its colour

c)

its temperature

d)

the material it is made from

46.

Solids are better heat conductors than liquids or gases because:

a)

the particles are closer together in gases

b)

the particles are closer together in liquids

c)

the particles are closer together in solids

d)

the particles in a solid cannot move

47.

The surface of which material would reflect infrared radiation the best?

a)

white and dull

b)

black and shiny

c)

white and shiny

d)

grey and dull

48.

The efficiency of an appliance is calculated by:

a)

comparing the useful and wasted energies

b)

measuring how much energy is transferred

c)

comparing the useful energy transferred to the total energy supplied

d)

comparing the wasted energy transferred to the total energy supplied

49.

A bag of sugar has a mass of 1 kg. What is its weight on Earth?

a)

1 N

b)

10N

c)

10kg

d)

0.1N

50.

Gravity:

a)

gets less if two objects get closer together

b)

gets stronger if two objects get further apart

c)

gets less if two objects get further apart

d)

does not depend on distance

51.

A living thing that is made up of only one cell is called...?

a)

Multicellular

b)

Unicellular

c)

Thursday

d)

Fred

52.

Which of the following is an example of a unicellular organism?

a)

Amoeba

b)

Bacteria

c)

Archaea

d)

All of the above plus protozoans

53.

Having different cell types specialized to perform different functions is a characteristic of which type of living organism?

a)

Unicellular

b)

Multicellular

54.

Which of the following is a similarity shared by unicellular and multicellular organisms?

a)

Both have long life spans.

b)

Both are small in size and thus are vulnerable to predators.

c)

Both have complex cell organization.

d)

Both are living organisms.

55.

Which of the following is not a characteristic of multicellular organisms?

a)

Their ability to regenerate is low.

b)

They have longer life spans, due to high operational efficiency.

c)

Cell specialisation is absent.

d)

They have complex cell organisation.

56.

I am the outer most layer of a plant cell. What am I?

a)

cell wall

b)

cell membrane

c)

nucleus

d)

cytoplasm

57.

The function of the cell membrane is to...

a)

protect, support and give the cell shape.

b)

control the movement of materials into and out of the cell.

c)

hold the genetic material and to control the cell.

d)

carry out photosynthesis, using the green pigment, chlorophyll.

58.

Which organelle is a large sap-filled structure in plant cells that stores water, wastes and nutrients?

a)

cell wall

b)

vacuole

c)

nucleus

d)

chloroplast

59.

What is the watery jelly-like substance inside of cells called?

a)

vacuole

b)

chloroplast

c)

cytoplasm

d)

nucleus

60.

Both plant and animal cells have cell membranes, but only plant cells have...

a)

cytoplasm

b)

chloroplasts

c)

cell walls

d)

both chloroplasts and cell walls

61.

A structure made up of a collection of tissues and that carries out a specialized function is called an...

a)

organ system

b)

organ

c)

cell

d)

organism

62.

A group of specialized cells that perform a common function are called...

a)

cells

b)

organs

c)

organ systems

d)

tissues

63.

What is the name of the thin walled tube, reinforced with rings of cartilage, that carries air in and out of your lungs?

a)

trachea

b)

alveoli

c)

diaphragm

d)

bronchi

64.

The cluster of air sacs in which oxygen and carbon dioxide are exchanged are called...?

a)

red blood cells

b)

white blood cells

c)

alveoli

d)

bronchi

65.

What is the name of the two tubes that carry air from the trachea into each lung?

a)

bronchi

b)

trachea

c)

alveoli

d)

diaphragm

66.

What is the Respiratory system responsible for?

a)

breaking down nutrients into parts small enough for your body to absorb and use for energy, growth and cell repair.

b)

movement.

c)

taking in oxygen and getting rid of carbon dioxide.

d)

to produce egg and sperm cells.

67.

The diaphragm is...?

a)

a cluster of air sacs in which oxygen and carbon dioxide are exchanged.

b)

the thin walled pipe, reinforced with rings of cartilage that carries air in and out of your lungs.

c)

a sheet of muscle that contracts, pulling air into the lungs and relaxes, pushing air out of the lungs.

d)

one of the two large tubes that carries air from the trachea into each lung.

68.

The organ that absorbs water and compacts and eliminates waste material is called the...?

a)

small intestines

b)

large intestines

c)

stomach

d)

liver

69.

The lining of the small intestines of 3 different animals is shown in the picture. Would X, Y or Z, be the most effective at absorbing nutrients?

a)

X

b)

Y

c)

Z

70.

What is the name of the small, slender projections that line the small intestine?

a)

cells

b)

flagella

c)

cilia

d)

villi

71.

Why is the small intestine lining labelled Z, the most effective at absorbing nutrients?

a)

it has the shortest villi.

b)

it has no villi.

c)

it as the most villi, which increase the surface area.

d)

it has lots of platelets.

72.

When amylase, an enzyme in saliva interacts with starchy foods, it breaks them down into...

a)

complex sugars that taste sour.

b)

simple sugars that taste sweet.

c)

proteins

d)

bile

73.

Which type of blood vessel carries oxygen?

a)

plasma

b)

red blood cells

c)

platelets

d)

white blood cells

74.

The left ventricle has thicker walls than the right ventricle because...

a)

it has to pump blood to the lungs.

b)

it has to pump blood further; around the whole body.

c)

it works out more regularly at the gym

d)

it is compensating for the left atrium.

75.

True or False. The ventricles are at the top of the heart.

a)

False

b)

True

76.

Select all that apply.

Arteries...

a)

have thin, non-elastic, less muscular walls

b)

carry oxygenated blood (except the pulmonary artery)

c)

have thick walls to withstand high blood pressure

d)

are just beneath the surface

77.

Select all that apply.

Veins...

a)

have thin, non-elastic, less muscular walls.

b)

have valves to stop blood from 'running backwards'.

c)

are usually found just beneath the surface.

d)

carry deoxygenated blood, (except the pulmonary vein).

78.

Select all that apply.

Capillaries...

a)

have thick, elastic, muscular walls.

b)

carry both oxygenated and deoxygenated blood.

c)

have thin walls that allow fast and easy transfer of gases between the blood and body cells.

d)

connect arteries and veins.

79.

The part of the heart labelled "I" is called the...

(It carries blood away from your heart to the rest of your body).

a)

right atrium

b)

left atrium

c)

right ventricle

d)

aorta

80.

The main function of the testes is to...?

a)

produce eggs (ova) and estrogen

b)

produce zygotes.

c)

produce sperm and testosterone

d)

produce sperm and estrogen

81.

What is the unit of force?

a)

Newtons

b)

Kilograms

c)

Joules

d)

Watts

82.

Which two are contact forces?

a)

Friction

b)

Air resistance

c)

Gravity

d)

Magnetic force

83.

Which two are non-contact forces?

a)

Friction

b)

Air resistance

c)

Gravity

d)

Magnetic force

84.

What is the name for a squashing force?

a)

Compression

b)

Tension

c)

Moment

d)

Reaction

85.

What is the name for a stretching force?

a)

Compression

b)

Tension

c)

Moment

d)

Reaction

86.

What is the name for the turning effect of a force?

a)

Compression

b)

Tension

c)

Moment

d)

Reaction

87.

"If the force on an object doubles, the extension doubles." Whose law is this?

a)

Hooke's law

b)

Newton's law

c)

Ohm's law

d)

Boyle's law

88.

What is the elastic limit of an object?

a)

The point at which it will no longer return to its original shape

b)

The point at which it breaks

c)

The point at which it starts stretching

d)

The largest amount it can be stretched by

89.

What is the unit of a moment?

a)

Newton-metres

b)

Newtons

c)

Kilogram-metres

d)

Seconds

90.

How do you calculate a moment?

a)

Force x distance from pivot

b)

Force ÷ distance from pivot

c)

Distance from pivot ÷ force

d)

Mass x gravitational field strength

91.

Which of these are fluids?

a)

Solids

b)

Liquids

c)

Gases

92.

What is the unit of pressure?

a)

N/m2

b)

kg/m3

c)

N/m

d)

m/N2

93.

How do you calculate pressure?

a)

Force ÷ area

b)

Force x area

c)

Area ÷ force

d)

Force ÷ length

94.

What happens to atmospheric pressure as you increase altitude (height)?

a)

Decreases

b)

Stays the same

c)

Increases

95.

Which of these are incompressible?

a)

Solids

b)

Liquids

c)

Gases

96.

Which of these make use of hydraulics?

a)

Car brakes

b)

Mechanical digger arm

c)

Bike chain

d)

Wind turbine

97.

What does "normal" mean in the context of forces?

a)

At right angles to

b)

Parallel to

c)

Ordinary

d)

Not changing

98.

Which of these are designed or adapted to reduce the stress applied to a surface?

a)

Elephant's foot

b)

Snowboard

c)

Knife blade

d)

Tip of a nail

99.

How does oxygen enters the body and carbon dioxide leave?

a)

Breathing

b)

Respiration

c)

Photosynthesis

d)

Digestion

100.

Which muscle contracts and relaxes to make breathing happen?

a)

A. Diaphragm

b)

B. Intercostal muscles

c)

C. Abdominal muscles

d)

D. Quadriceps

101.

What is the correct order of body parts that air passes through during breathing in?

a)

A. Trachea → Bronchi → Alveoli

b)

B. Alveoli → Bronchi → Trachea

c)

C. Trachea → Alveoli → Bronchi

d)

D. Bronchi → Trachea → Alveoli Answer

102.

Which gases are exchanged in the alveoli in the lungs?

a)

A. Oxygen and nitrogen

b)

B. Oxygen and carbon dioxide

c)

C. Carbon dioxide and nitrogen

d)

D. Carbon dioxide and water vapor

103.

Identify part D

a)

Trachea

b)

Bronchus

c)

Bronchiole

d)

Alveoli

104.

There are ____ bones in an adult human skeleton.

a)
205
b)
236
c)
206
d)
1,000
105.

Which bone protects your brain?

a)

Tibia

b)

Skull

c)

Ribs

d)

Femur

106.

Which bone protects your lungs?

a)

Ribs

b)

Spinal Column

c)

ilium

d)

Fibular

107.

Which of these functions is not a function of the skeletal system?

a)

To help the body breathe

b)

To help support the body and give it structure

c)

To help protect the bodyʻs soft organs

d)

To produce blood cells

e)

To enable the body to move

108.

How does an antagonistic pair work?

a)

Muscles move.

b)

Paired muscles move.

c)

Muscles relax and contract to move bones.

d)

As one muscle relaxes the other contracts to allow movement at a joint.

109.

What are the two reactants (things the body needs) to do aerobic respiration?

a)

oxygen

b)

glucose

c)

carbon dioxide

d)

water

e)

energy

110.

What are the two chemical products (things that are made) during aerobic respiration?

a)

oxygen

b)

glucose

c)

carbon dioxide

d)

water

e)

energy

111.

What is the purpose of respiration?

a)

release energy

b)

create energy

c)

convert light to chemical energy

d)

store energy

112.

Which type of respiration DOES NOT require oxygen?

a)

anaerobic

b)

aerobic

113.

Which is the correct word equation for anaerobic respiration in humans?

a)

glucose --> lactic acid + energy

b)

glucose + oxygen --> lactic acid + energy

c)

glucose --> lactic acid + carbon dioxide + energy

d)

glucose --> ethanol + carbon dioxide + energy

114.

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

115.

I am left behind in the filter paper ]. What Am I?

a)

Filtrate

b)

Solution

c)

Residue

116.

The part of the mixture that passes through the filter paper is called the

a)

residue

b)

filtrate

c)

suspension

117.

Th components of filtration are separated based on

a)

boiling point

b)

solubility

c)

particle size

118.

Sand, gravel and rocks can be used to filter dirty water.

a)

True

b)

False

119.

Which of these techniques separates an insoluble solid from its mixture with water?

a)

Distillation

b)

Filtration

c)

Threshing

d)

Winnowing

120.

Which of these techniques separates an insoluble solid from its mixture with water?

a)

Distillation

b)

Filtration

c)

Threshing

d)

Winnowing

121.

Which of these is needed for filtration?

a)

Wire gauze

b)

Burner

c)

Funnel

d)

Round-bottom flask

122.
Which is an example of a solute?
a)
Egg whites
b)
Sugar
c)
Water
d)
Acetone
123.
Which is an example of a solvent?
a)
Salt
b)
Egg whites
c)
Water
d)
Sugar
124.

What is a solvent?

a)

A liquid that will dissolve a solid solute

b)

Another word for solution

c)

A thing that make drinks change colour

d)

Usually the solid about to be dissolved

125.

If I dissolve carbon dioxide in water, what is the solvent?

a)

Carbon Dioxide

b)

There is no solvent

c)

Oxygen

d)

Water

126.

A type of mixture that forms when one substance dissolves in another is known as a

a)

heterogeneous mixture

b)

solution

c)

solute

d)

solvent

127.

Which of the following usually makes a substance dissolve faster in a solvent?

a)

adding more solvent to the solution

b)

increasing the particle size of the solute

c)

lowering the temperature

d)

decreasing the number of particles

128.

Which of the following describes: 'Dissolved particles are distributed evenly and you can no longer see them.'?

a)

conductivity

b)

solution

c)

mixture

d)

metal

129.

If a material does NOT dissolve in a liquid, it is said to be___________________

a)

soluble

b)

insoluble

c)

partly soluble

d)

partly insoluble

130.

What is a small particle that is known as the basic building block of matter?

a)

molecule

b)

compound

c)

element

d)

atom

131.
The element oxygen, represented by the symbol O, is classified as
a)
a pure substance
b)
a compound
c)
a mixture
d)
a solution
132.
What is a compound?
a)
an atom with more electrons than protons
b)
a substance in which the atoms of two or more elements are combined together
c)
an atom with more neutrons than protons
d)
a substance in which the atoms of three or more elements are combined together
133.

Oxygen, Nitrogen, Hydrogen, and Calcium are all examples of ______________________.

a)

molecules

b)

compounds

c)

atoms

d)

elements

134.

Which one of the following is a compound?

a)

NaCl

b)

O2O_2  

c)

Hydrogen

d)

He

135.

Which of these is only a molecule and not a compound?

a)

a

b)

b

c)

c

d)

d

136.

Which of the following is different from the rest of the group? (choose the answer that best applies)


Nitrous Oxide (N₂O)

Ozone (O₃)

Carbon Dioxide (CO₂)

Dihydrogen Monoxide (H₂O)

a)

Ozone (O₃)

b)

Nitrous Oxide (N₂O)

c)

Carbon Dioxide (CO₂)

d)

Dihydrogen Monoxide (H₂O)

137.

Name the ionic compound, LiCl

a)

lithium chlorine

b)

lithium chloride

c)

lithium chlorate

d)

lithium monochloride

138.
K20 - name?
a)
potassium dioxide
b)
potassium oxide
c)
potassium oxygen
d)
dipotassium dioxide
139.

Name the following compound:

CO2

a)

monocarbon dioxide

b)

carbon oxide

c)

carbon dioxide

d)

oxygen carbonide

140.
Where are the non-metals located on the periodic table?
a)
All over
b)
On the left side of the "staircase"
c)
On the right side of the "staircase"
141.
What is the proper name for CaCl2?
a)
Calcium dichloride
b)
Monocalcium dichloride
c)
Calcium chloride
d)
Calcium chlorine
142.
Name this formula: 
Al2O3
a)
Aluminum Oxide
b)
Aluminum Oxygen
c)
Antimony Oxide
d)
Aluminum (VII) Oxide
143.

The law of conservation of mass says substances can neither be _______ nor ___________.

a)

Built; torn down

b)

Blended together; separated

c)

Created; destroyed

d)

Condensed; extracted

144.

When sodium and chlorine combine to form sodium chloride, sodium chloride is the:

a)

Originator

b)

Reactant

c)

Product

d)

Produce

145.

4 grams of hydrogen and 32 grams of oxygen will combine to form:

a)

36 grams of water

b)

28 grams of hydroxide

c)

32 grams of oxygen

d)

36 grams of deuterium

146.

In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?

a)

4 grams

b)

6 grams

c)

8 grams

d)

10 grams

147.
Another term for burning is
a)
Fire triangle
b)
Magnesium oxide
c)
Combustion
d)
Bustion
148.
The condition which are required for combustion to take place are:
a)
fuel
b)
ignition temperature
c)
oxygen
d)
all of these
149.
Why do we burn a fuel?
a)
I don't know.
b)
To release energy
c)
To lose energy
d)
To produce carbon dioxide
150.
What type of reaction occurs in a hand warmer
a)
exothermic
b)
endothermic
151.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
152.
In an endothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released 
153.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

154.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

155.
a)
Periods
b)
Groups
156.
a)
Periods
b)
Groups
157.
a)
Metals
b)
Nonmetals
c)
Metalloids
158.
a)
Metals
b)
Nonmetals
c)
Metalloids
159.

What does this warning symbol mean?

a)

Toxic

b)

Corrosive

c)

Flammable

d)

Irritant

160.

What does this warning symbol mean?

a)

Toxic

b)

Corrosive

c)

Flammable

d)

Irritant

161.

What does this warning symbol mean?

a)

Toxic

b)

Corrosive

c)

Flammable

d)

Irritant

162.
What colour is universal indicator in a strong alkali?
a)
Green
b)
Orange
c)
Purple
d)
Red
163.
What colour is universal indicator in a neutral solution?
a)
Green
b)
Orange
c)
Purple
d)
Red
164.
What colour is universal indicator in strong acid?
a)
Green
b)
Orange
c)
Purple
d)
Red
165.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
166.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
167.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
168.

An alkali can neutralize an acid

a)

False

b)

True

169.

Metal + Acid -> ___ + ___

a)

Salt + Hydrogen

b)

Metal Hydroxide + Hydrogen

c)

Metal Oxide + Hydrogen

d)

Metal Carbonate + Hydrogen

170.

Sodium + Hydrochloric acid ->

a)

Sodium chlorine

b)

Sodium chlorine + hydrogen

c)

Sodium chloride + hydrogen

d)

Sodium chloride

171.

Lithium + nitric acid ->

a)

Lithium nitride + hydrogen

b)

Lithium nitric + hydrogen

c)

Lithium nitrogen + hydrogen

d)

Lithium nitrate + hydrogen

172.

How can you test for hydrogen gas?

a)

sniff it

b)

squeaky pop test

c)

add universal indicator

d)

add lemon water

173.

Zinc + sulphuric acid ->

a)

hydrogen + Zinc sulphate

b)

Zinc sulphide + hydrogen

c)

Zinc Sulphur + hydrogen

d)

Zinc sulphate + helium

174.

What is always a product when a metal reacts with an acid?



(a)  

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