Kinetic Particle Theory

Question 1

Meaning of matter

Answer 1

Anything that has mass and takes up space

Question 2

Meaning of particle

Answer 2

Building block of matter

Question 3

Melting

Answer 3

The process by which a solid turns into a liquid at its melting point

Question 4

Boiling

Answer 4

At which as liquid turns into a gas at its boiling point

Question 5

Condensation

Answer 5

The process by which a gas turns into a liquid

Question 6

freezing

Answer 6

The process by which a liquid turns into a solid

Question 7

Sublimation

Answer 7

The process at which a solid turns directly into a gas without melting

Question 8

Evaporation

Answer 8

The conversion of liquid to its vapour below the boiling temperature of the liquid

Question 9

Deposition

Answer 9

When a gas turns directly into a solid

Question 10

Kinetic Particle Theory states:

Answer 10

“All matter is made up of tiny particles that are in constant random motion and constantly collide with one another”

Question 11

A scientific theory is?

Answer 11

A scientific theory is a well-substantiated explanation of some aspect of the natural world

Question 12

Matters can be classified as…

Answer 12

1. Solid
2. Liquid
3. Gas

Question 13

Arrangement of particles in a solid

Answer 13

The particles of a solid are closely packed in an orderly pattern with very little space between them

Question 14

Arrangement of particles in a liquid

Answer 14

The particles of a liquid are closely packed in a disorderly manner, with slightly more spaces between them than in a solid

Question 15

Arrangement of particles in a gas

Answer 15

The particles of a gas are very far apart from one another in a disorderly manner

Question 16

Movement of particles in a solid

Answer 16

Vibrate and rotate about their fixed positions

Question 17

Movement of particles for liquids

Answer 17

Slide over one another

Question 18

Movement of particles for gases

Answer 18

Rapidly and freely in all directions

Question 19

Energy level of particles in a solid

Answer 19

Low

Question 20

Energy level of particles in a liquid

Answer 20

Moderate

Question 21

Energy level of particles in a gas

Answer 21

High

Question 22

Shape of particles in a solid

Answer 22

DEFINITE SHAPE as the particles cannot move about freely

Question 23

Shape of particles in a Liquid

Answer 23

NO DEFINITE SHAPE, but takes the shape of the container as particles ARE ABLE TO MOVE ABOUT

Question 24

Shape of particles in a gas

Answer 24

NO DEFINITE SHAPE, but takes the shape of the container as particles ARE ABLE TO MOVE ABOUT

Question 25

Volume of solids

Answer 25

FIXED VOLUME as particles are closely packed and there is LITTLE/ ALMOST NO SPACE BETWEEN PARTICLES

Question 26

Volume of liquids

Answer 26

FIXED VOLUME as particles are closely packed and there LITTLE SPACE BETWEEN PARTICLES

Question 27

Volume of gases

Answer 27

• NO FIXED VOLUME. Gases can be COMPRESSED
• There are LARGE SPACES BETWEEN THE PARTICLES, hence, particles can come closer together or move further away

Question 28

Expansion

Answer 28

When matter is heated, the particles gain energy and move faster and further apart. Thus, volume increases

Question 29

Contraction

Answer 29

When matter is cooled, the particles and move slower and closer together. Thus, volume decreases.

Question 30

Similarities between evaporation and boiling

Answer 30

Both involves the change from liquid to gas

Question 31

Difference between evaporation and boiling

Answer 31

1. Evaporation occurs at the surface only while boiling occurs throughout the liquid
2. Evaporation occurs below boiling point and Boiling occurs when temperature reaches boiling point