chemistry

Question 1

What is matter?

Answer 1

Matter is anything that has mass and occupies space.

Question 2

True or False: Matter can exist in three states.

Answer 2

True

Question 3

List the three states of matter.

Answer 3

Solid, Liquid, Gas

Question 4

Fill in the blank: The state of matter with a definite shape and volume is called a _______.

Answer 4

Solid

Question 5

What is the state of matter that has a definite volume but takes the shape of its container?

Answer 5

Liquid

Question 6

What is the state of matter that has neither a definite shape nor a definite volume?

Answer 6

Gas

Question 7

True or False: Gases are compressible.

Answer 7

True

Question 8

Which state of matter has particles that are tightly packed together?

Answer 8

Solid

Question 9

What happens to the particles in a liquid when it is heated?

Answer 9

The particles gain energy and move faster, potentially changing to gas.

Question 10

Fill in the blank: In gases, particles are _______ apart compared to solids and liquids.

Answer 10

far

Question 11

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

Answer 11

Melting

Question 12

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

Answer 12

Vaporization

Question 13

What is the opposite of condensation?

Answer 13

Vaporization

Question 14

True or False: All substances can exist in all three states of matter.

Answer 14

False

Question 15

What is a physical change?

Answer 15

A change that affects one or more physical properties of a substance without altering its chemical composition.

Question 16

Give an example of a chemical change.

Answer 16

Rusting of iron.

Question 17

What is the term for a substance made up of two or more different types of atoms?

Answer 17

Compound

Question 18

What is the smallest unit of an element called?

Answer 18

Atom

Question 19

Fill in the blank: A _______ is a combination of two or more substances that are not chemically bonded.

Answer 19

Mixture

Question 20

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Answer 20

Homogeneous mixtures are uniform in composition, while heterogeneous mixtures have distinctly different components.

Question 21

What is the law of conservation of mass?

Answer 21

Mass is neither created nor destroyed in a chemical reaction.

Question 22

True or False: The temperature at which a substance boils is the same as the temperature at which it condenses.

Answer 22

True

Question 23

What is sublimation?

Answer 23

The process by which a solid changes directly into a gas without becoming a liquid.

Question 24

What happens to the energy of particles as a substance is heated?

Answer 24

The energy of the particles increases.

Question 25

Fill in the blank: The transition from gas to solid without passing through the liquid state is called _______.

Answer 25

Deposition

Question 26

What is the term for a mixture that is not uniform throughout?

Answer 26

Heterogeneous mixture