Question 1

What is the smallest unit of matter that retains the properties of an element?

Accepted Answer

Atom

Answer

Molecule

Answer

Compound

Answer

Element

Question 2

Which state of matter has a definite shape and volume?

Accepted Answer

Solid

Answer

Liquid

Answer

Plasma

Answer

Gas

Question 3

What is it called when a liquid changes into a gas?

Accepted Answer

Evaporation

Answer

Condensation

Answer

Sublimation

Answer

Freezing

Question 4

What do you call a mixture where one substance is dissolved evenly into another?

Accepted Answer

Solution

Answer

Emulsion

Answer

Compound

Answer

Suspension

Question 5

Which of the following is a characteristic of gases?

Accepted Answer

They can expand to fill their container.

Answer

They have a definite shape.

Answer

They are incompressible.

Answer

They have fixed volume.

Question 6

What term describes the change of state from solid directly to gas?

Accepted Answer

Sublimation

Answer

Freezing

Answer

Melting

Answer

Condensation

Question 7

What property of matter refers to its resistance to changes in motion?

Accepted Answer

Inertia

Answer

Density

Answer

Mass

Answer

Volume

Question 8

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

Accepted Answer

Melting

Answer

Sublimation

Answer

Condensation

Answer

Evaporation

Question 9

What is the measure of the amount of matter in an object?

Accepted Answer

Mass

Answer

Density

Answer

Volume

Answer

Weight

Question 10

Which of the following is NOT a state of matter?

Accepted Answer

Energy

Answer

Gas

Answer

Liquid

Answer

Solid

Question 11

What is the process called when a solid turns directly into a gas?

Accepted Answer

Sublimation

Answer

Freezing

Answer

Condensation

Answer

Evaporation

Question 12

Which of the following is an example of a liquid?

Accepted Answer

Water

Answer

Oxygen

Answer

Iron

Answer

Wood

Question 13

What happens to the particles of a substance when it is heated?

Accepted Answer

They move faster

Answer

They move slower

Answer

They become larger

Answer

They stay still

Question 14

Which state of matter has a definite shape and definite volume?

Accepted Answer

Solid

Answer

Gas

Answer

Liquid

Answer

Plasma

Question 15

What is the term for the change from a gas to a liquid?

Accepted Answer

Condensation

Answer

Sublimation

Answer

Evaporation

Answer

Freezing

Question 16

What is the state of matter where particles are far apart and move freely?

Accepted Answer

Gas

Answer

Plasma

Answer

Solid

Answer

Liquid

Question 17

Which of the following describes a characteristic of liquids?

Accepted Answer

They take the shape of their container

Answer

They cannot flow

Answer

They are always solid

Answer

They have a fixed shape

Question 18

Which state of matter has the most energy?

Accepted Answer

Plasma

Answer

Solid

Answer

Liquid

Answer

Gas

Question 19

What is the term for the change of state from liquid to gas?

Accepted Answer

Evaporation

Answer

Sublimation

Answer

Condensation

Answer

Melting

Question 20

What is a pure substance?

Accepted Answer

A material made of only one type of particle

Answer

A substance that can change state easily

Answer

A compound that is toxic

Answer

A mixture of different substances

Question 21

Which of the following is an example of a pure substance?

Accepted Answer

Distilled water

Answer

Fruit juice

Answer

Salt water

Answer

Air

Question 22

What can pure substances be classified into?

Accepted Answer

Elements and compounds

Answer

Liquids and gases

Answer

Solids and mixtures

Answer

Acids and bases

Question 23

Which of the following is NOT a characteristic of a pure substance?

Accepted Answer

It can easily change its composition

Answer

It cannot be separated by physical means

Answer

It has consistent properties

Answer

It has a uniform and definite composition

Question 24

Which of the following is an example of an element?

Accepted Answer

Oxygen

Answer

Soda

Answer

Sugar

Answer

Water

Question 25

What happens to the properties of a pure substance when it is heated?

Accepted Answer

They remain the same

Answer

They change completely

Answer

They become mixed with air

Answer

They disappear

Question 26

Which of the following describes a characteristic of a compound?

Accepted Answer

It is made of two or more different elements chemically bonded

Answer

It is always a gas

Answer

It can be separated by physical means

Answer

It has no fixed composition

Question 27

Which of the following is true about mixtures compared to pure substances?

Accepted Answer

Mixtures can vary in composition

Answer

Mixtures have a uniform appearance

Answer

Mixtures consist of only one component

Answer

Mixtures are always in the liquid state

Question 28

Which of the following is NOT a pure substance?

Accepted Answer

Air

Answer

Carbon dioxide

Answer

Sodium chloride

Answer

Gold

Question 29

What type of pure substance is formed when two or more elements chemically combine?

Accepted Answer

Compound

Answer

Solution

Answer

Mixture

Answer

Element

Question 30

What is a pure substance?

Accepted Answer

A material made of only one type of particle

Answer

A mixture of different elements

Answer

A solid that can dissolve in water

Answer

A gas without any pressure

Question 31

Which of the following is an example of a pure substance?

Accepted Answer

Water (H2O)

Answer

Fruit juice

Answer

Salt water

Answer

Air

Question 32

Which of the following statements is true about pure substances?

Accepted Answer

They have consistent properties throughout

Answer

They are always gases

Answer

They can be made of different types of atoms

Answer

They can vary in composition

Question 33

What is a common feature of all pure substances?

Accepted Answer

They cannot be separated into simpler substances by physical means

Answer

They have different boiling points

Answer

They are always solid at room temperature

Answer

They can be easily mixed with other substances

Question 34

Which of the following is NOT a pure substance?

Accepted Answer

Salt water

Answer

Oxygen gas

Answer

Sodium chloride (table salt)

Answer

Gold

Question 35

Which of the following pure substances is made up of only one kind of atom?

Accepted Answer

Aluminum

Answer

Salt

Answer

Sugar

Answer

Carbon dioxide

Question 36

What best describes a chemical compound?

Accepted Answer

A substance formed when two or more elements chemically bond together

Answer

A solid that cannot dissolve in water

Answer

A single type of atom

Answer

A mixture of two or more substances

Question 37

Which of the following is an example of a compound?

Accepted Answer

Carbon dioxide (CO2)

Answer

Gold (Au)

Answer

Oxygen (O2)

Answer

Hydrogen (H2)

Question 38

What property distinguishes pure substances from mixtures?

Accepted Answer

Pure substances have a fixed composition

Answer

Mixtures have consistent properties

Answer

Pure substances can vary in composition

Answer

Mixtures are always made of solids

Question 39

Which of the following is true about elements?

Accepted Answer

They are pure substances that cannot be broken down into simpler substances

Answer

They always exist in solid form

Answer

They can be composed of two or more different kinds of atoms

Answer

They are the same as mixtures

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