C1. States of matter

Question 1

What are the three main states of matter?

Answer 1

The three main states of matter are solid

Question 2

Describe the arrangement and movement of particles in a solid.

Answer 2

In a solid

Question 3

Describe the arrangement and movement of particles in a liquid.

Answer 3

In a liquid

Question 4

Describe the arrangement and movement of particles in a gas.

Answer 4

In a gas

Question 5

What is the difference between the particles in a solid and those in a liquid?

Answer 5

In a solid

Question 6

What is meant by the term “kinetic energy” in relation to the states of matter?

Answer 6

Kinetic energy refers to the energy of motion. In solids

Question 7

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

Answer 7

When a substance is heated

Question 8

Define “melting point” in terms of the states of matter.

Answer 8

The melting point is the temperature at which a solid turns into a liquid. At this temperature

Question 9

Define “boiling point” in terms of the states of matter.

Answer 9

The boiling point is the temperature at which a liquid turns into a gas. The particles in the liquid gain enough energy to break free from the liquid state and enter the gas phase.

Question 10

What is sublimation?

Answer 10

Sublimation is the process where a substance changes directly from a solid to a gas without passing through the liquid state

Question 11

What is condensation?

Answer 11

Condensation is the process where a gas turns into a liquid as it cools

Question 12

What is freezing (solidification)?

Answer 12

Freezing is the process where a liquid turns into a solid as its temperature decreases. The particles lose energy and move closer together to form a rigid structure.

Question 13

What is the relationship between temperature and the movement of particles in a substance?

Answer 13

As temperature increases

Question 14

What are the key differences between physical and chemical changes in states of matter?

Answer 14

A physical change in state involves a change in the arrangement or energy of particles (e.g.

Question 15

What is the difference between evaporation and boiling?

Answer 15

Evaporation occurs at the surface of a liquid at temperatures below the boiling point

Question 16

How does pressure affect the state of matter in gases?

Answer 16

Increasing pressure on a gas decreases the space between particles