Materials and their Properties: Interactive Learning Quizzes for Year 7 Science

Question 1

How do temperature and pressure typically affect phase changes?

Accepted Answer

Increased temperature leads to melting, while increased pressure leads to freezing.

Answer

Increased temperature leads to freezing, while increased pressure leads to melting.

Answer

Increased pressure leads to melting, while increased temperature leads to freezing.

Question 2

Which of the following best defines density?

Accepted Answer

The amount of mass in a specific volume of a substance

Answer

The amount of space an object occupies

Answer

The weight of an object

Answer

The amount of force required to move an object

Question 3

How can the production and use of different materials negatively affect the environment? Select all that apply.

Accepted Answer

Depletion of natural resources

Accepted Answer

Pollution created during production

Accepted Answer

Accumulation of waste

Answer

Little to no impact

Question 4

Which material would be the best choice for making a bicycle frame? Explain your answer.

Accepted Answer

Steel

Answer

Glass

Answer

Wood

Answer

Plastic

Question 5

For a pedestrian bridge, which material properties are crucial for engineers to consider, and how do these properties impact the bridge's performance?

Accepted Answer

Strength, durability, and weight

Answer

Appearance, texture, and flexibility

Question 6

What are some ways we can make more sustainable choices when using materials to reduce their environmental impact?

Accepted Answer

Use reusable bags instead of plastic bags.

Accepted Answer

Recycle paper and cardboard.

Accepted Answer

Buy products made from recycled materials.

Answer

Throw all waste in the same bin.

Question 7

The use of materials like rare earth elements in electronics has raised ethical concerns. What environmental and social factors should we consider when using these materials?

Accepted Answer

The extraction and use of rare earth elements can have environmental and social implications. We should promote sustainable practices to reduce these impacts.

Answer

Rare earth elements are abundant, so their use has little environmental impact.

Answer

The benefits of using rare earth elements in electronics outweigh any ethical concerns.

Question 8

What property enables a rubber band to regain its original shape after being stretched?

Accepted Answer

Elasticity

Answer

Hardness

Answer

Brittleness

Question 9

You're designing a new material for a school project, like a lightweight and durable material for sports equipment. How can materials informatics help you?

Accepted Answer

Find materials with the properties you need quickly.

Answer

Only be used to make materials, not design them.

Answer

Only be used to study existing materials.

Answer

Not be trusted for materials development.

Question 10

Which of the following involves a permanent change in the chemical composition of a substance?

Accepted Answer

Burning wood

Answer

Melting ice

Answer

Crushing a can

Answer

Dissolving salt in water

Question 11

When water changes from a liquid to a gas, the process is known as:

Accepted Answer

Evaporation

Answer

Condensation

Answer

Freezing

Answer

Melting

Question 12

Which of the following materials conducts electricity well?

Accepted Answer

Iron

Answer

Wood

Answer

Glass

Answer

Plastic

Question 13

The process of separating a liquid mixture based on different boiling points is called:

Accepted Answer

Distillation

Answer

Filtration

Answer

Chromatography

Answer

Evaporation

Question 14

The main gas that makes up the air we breathe is:

Accepted Answer

Nitrogen

Answer

Oxygen

Answer

Carbon dioxide

Answer

Hydrogen

Question 15

Which of these materials is a plant-based polymer?

Accepted Answer

Cotton

Answer

Nylon

Answer

Polystyrene

Answer

Polypropylene

Question 16

The force that binds atoms together is called:

Accepted Answer

Electromagnetic force

Answer

Gravitational force

Answer

Friction

Answer

Magnetic force

Question 17

Which of these resources is replaced naturally and can be harvested continuously?

Accepted Answer

Wood

Answer

Coal

Answer

Oil

Answer

Natural gas

Question 18

Which of the following is NOT a physical property of materials?

Accepted Answer

Reactivity

Answer

Color

Answer

Density

Answer

Solid, liquid, or gas state

Question 19

Which of the following materials conducts electricity well?

Accepted Answer

Copper

Answer

Plastic

Answer

Wood

Answer

Rubber

Question 20

What happens when a solid turns directly into a gas?

Accepted Answer

Sublimation

Answer

Evaporation

Answer

Condensation

Answer

Freezing

Question 21

Which of the following is a chemical change?

Accepted Answer

Burning paper

Answer

Melting ice

Answer

Stretching a rubber band

Answer

Freezing water

Question 22

Which of the following materials allows light to pass through it?

Accepted Answer

Glass

Answer

Metal

Answer

Brick

Answer

Wood

Question 23

What is the difference between an endothermic and an exothermic reaction?

Accepted Answer

Exothermic reactions release heat, while endothermic reactions absorb heat.

Answer

Endothermic reactions release heat, while exothermic reactions absorb heat.

Answer

Endothermic reactions produce a gas, while exothermic reactions produce a solid.

Answer

Exothermic reactions are faster than endothermic reactions.

Question 24

What is the chemical formula for common salt?

Accepted Answer

NaCl

Answer

Na2Cl

Answer

ClNa

Answer

Na3Cl

Question 25

Which of the following is NOT a characteristic of materials?

Accepted Answer

Intelligence

Answer

Strength

Answer

Flexibility

Answer

Conductivity

Question 26

Which material is a conductor of electricity?

Accepted Answer

Metal

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 27

What happens to water when its temperature decreases to 0 degrees Celsius?

Accepted Answer

It becomes a solid

Answer

It becomes a gas

Answer

It becomes a liquid

Answer

Nothing happens

Question 28

Which of the following is a chemical change?

Accepted Answer

Burning paper

Answer

Melting ice

Answer

Crushing a can

Answer

Boiling water

Question 29

Which material is the most flexible?

Accepted Answer

Rubber

Answer

Glass

Answer

Steel

Answer

Ceramic

Question 30

What is the melting point of water?

Accepted Answer

0°C

Answer

32°C

Answer

100°C

Answer

212°C

Question 31

What is the process called when a solid changes directly to a gas?

Accepted Answer

Sublimation

Answer

Melting

Answer

Evaporation

Answer

Condensation

Question 32

Which state of matter has a definite shape and volume?

Accepted Answer

Solid

Answer

Liquid

Answer

Gas

Answer

Plasma

Question 33

What is the process called when a solid turns into a liquid?

Accepted Answer

Melting

Answer

Freezing

Answer

Sublimation

Answer

Condensation

Question 34

Which of the following materials is a good conductor of heat?

Accepted Answer

Copper

Answer

Wood

Answer

Plastic

Answer

Rubber

Question 35

What happens when a material undergoes a chemical change?

Accepted Answer

Its composition changes

Answer

Its composition remains unchanged

Answer

Its physical properties change

Answer

Its state of matter changes

Question 36

Which of the following materials is used to make bulletproof vests?

Accepted Answer

Kevlar

Answer

Nylon

Answer

Polyethylene

Answer

Carbon fiber

Question 37

Which of the following is NOT a physical property of a material?

Accepted Answer

Flammability

Answer

Color

Answer

Density

Answer

Melting point

Question 38

Which of the following is an example of a chemical change?

Accepted Answer

Burning wood

Answer

Condensation of water vapor

Answer

Dissolving salt in water

Answer

Stretching a rubber band

Question 39

Which state of matter has a definite shape and volume?

Accepted Answer

Solid

Answer

Liquid

Answer

Gas

Answer

Plasma

Question 40

What happens to the particles in a material when it transitions from a solid to a liquid?

Accepted Answer

They move further apart and speed up.

Answer

They move closer together and slow down.

Answer

They remain in the same position and vibrate more.

Answer

They change shape and form bonds with each other.

Question 41

Which of the following materials is the most malleable?

Accepted Answer

Gold

Answer

Iron

Answer

Aluminum

Answer

Glass

Question 42

A mixture of sand and water can be separated by:

Accepted Answer

Filtration

Answer

Evaporation

Answer

Distillation

Answer

Chromatography

Question 43

Which of the following factors does NOT affect the rate of a chemical reaction?

Accepted Answer

Shape of the container

Answer

Temperature

Answer

Concentration

Answer

Surface area

Question 44

The following reaction is exothermic:

Accepted Answer

Burning propane

Answer

Dissolving salt in water

Answer

Neutralization of an acid and a base

Answer

Photosynthesis

Question 45

Which of the following is a composite material?

Accepted Answer

Carbon fiber

Answer

Steel

Answer

Wood

Answer

Glass

Question 46

Which of the following is NOT a property of materials?

Accepted Answer

Flavor

Answer

Hardness

Answer

Color

Answer

Melting point

Question 47

Which material conducts electricity?

Accepted Answer

Copper

Answer

Plastic

Answer

Wood

Answer

Glass

Question 48

What happens when a solid changes into a liquid?

Accepted Answer

Melting

Answer

Boiling

Answer

Condensing

Answer

Freezing

Question 49

Which of the following is a chemical change?

Accepted Answer

Burning a candle

Answer

Dissolving salt in water

Answer

Crushing ice

Answer

Bending a paper clip

Question 50

Which material is the most dense?

Accepted Answer

Iron

Answer

Water

Answer

Air

Answer

Wood

Question 51

What happens when a gas changes directly into a solid?

Accepted Answer

Deposition

Answer

Condensation

Answer

Sublimation

Answer

Evaporation

Question 52

Which material is a composite?

Accepted Answer

Concrete

Answer

Steel

Answer

Plastic

Answer

Wood

Question 53

What happens when a substance dissolves in a liquid?

Accepted Answer

A solution is formed

Answer

A chemical reaction occurs

Answer

A solid is formed

Answer

The substance decomposes

Question 54

Which action helps us manage materials sustainably?

Accepted Answer

Reusing items like glass jars and plastic containers

Answer

Throwing away electronic waste in regular trash

Answer

Using disposable cutlery and plates for convenience

Answer

Burning plastics to create heat

Question 55

Which property of a material describes its mass per unit volume?

Accepted Answer

Density

Answer

Strength

Answer

Flexibility

Answer

Conductivity

Question 56

Which material is a good conductor of electricity?

Accepted Answer

Metal

Answer

Wood

Answer

Plastic

Answer

Rubber

Question 57

What process involves a solid turning directly into a gas?

Accepted Answer

Sublimation

Answer

Melting

Answer

Freezing

Answer

Condensation

Question 58

Which of the following is an example of a chemical change?

Accepted Answer

Burning paper

Answer

Dissolving sugar in water

Answer

Freezing water

Answer

Tearing a piece of cloth

Question 59

Which material is most suitable for making oven gloves?

Accepted Answer

Rubber

Answer

Cotton

Answer

Silk

Answer

Metal

Question 60

What happens to the particles in a material when it changes from a gas to a liquid?

Accepted Answer

They move slower and become more closely packed.

Answer

They move faster and become more spread out.

Answer

They change shape.

Answer

They disappear.

Question 61

Which material is biodegradable?

Accepted Answer

Paper

Answer

Plastic

Answer

Glass

Answer

Metal

Question 62

Which instrument is used to measure the hardness of materials?

Accepted Answer

Mohs scale

Answer

Thermometer

Answer

Ammeter

Answer

Voltmeter

Question 63

Which factor does NOT affect the speed of a chemical reaction?

Accepted Answer

The colour of the reactants

Answer

Temperature

Answer

Concentration

Answer

Surface area

Question 64

How do computational simulations assist scientists in designing new materials?

Accepted Answer

Scientists can rapidly test various element and structure combinations without constructing physical models.

Answer

Computational simulations can precisely predict all material properties, eliminating the need for physical testing.

Answer

Computational modeling is only effective for designing new materials with basic structures.