Final review

Question 1

Condensation

Answer 1

Gas turns into liquid

Question 2

Melting

Answer 2

Solid turns into liquid

Question 3

Evaporation

Answer 3

Liquid turns into gas

Question 4

Freezing

Answer 4

Liquid turns into solid

Question 5

A squashed rubber ball suffers a _________ change

Answer 5

Reversible

Question 6

Ice to water suffers a _________ change

Answer 6

Reversible

Question 7

A raw egg to cooked egg suffers an _______ change

Answer 7

Irreversible

Question 8

There is a glass of cola with 3 ice cubes in it. It is left in a
warm room for five minutes. The ice cubes become smaller. What happened?

Answer 8

Ice cubes melt, gas condenses on the outside of the glass.

Question 9

Gas particles

Answer 9

Are spread out, in constant motion and colliding with each other.

Question 10

Solid particles

Answer 10

Packed close together, no space to move at all

Question 11

Liquid particles

Answer 11

A little space to move around

Question 12

A colander is used to separate

Answer 12

food from boiling water

Question 13

You can use your fingers to separate

Answer 13

mixed nuts

Question 14

To separate sand and water you use

Answer 14

filter funnel

Question 15

To separate copper and iron powder you use

Answer 15

bar magnet

Question 16

Organ that digests food

Answer 16

stomach

Question 17

Organ in charge of exchanging gases

Answer 17

lungs

Question 18

Major respiratory system organ

Answer 18

Lungs

Question 19

Major nervous system organ

Answer 19

brain

Question 20

Major urinary system organ

Answer 20

kidneys

Question 21

Major circulatory system organ

Answer 21

heart

Question 22

Major digestive system organ

Answer 22

stomach

Question 23

Producer

Answer 23

A green plant that makes its own food

Question 24

Prey

Answer 24

An animal that is eaten

Question 25

Predator

Answer 25

An animal that eats another animal

Question 26

Type of forces applied to a car

Answer 26

Upthrust, Friction, Weight, Car force

Question 27

Type of forces applied to a kite

Answer 27

Lift, Pulling force, Force of the wind, Weightt

Question 28

Type of forces applied to a parachute

Answer 28

Lift, Pulling force/Force of the wind, Force of the wind / Pulling force, Weight

Question 29

Does the mass of an astronaut changes in space?

Answer 29

Astronauts may not weigh anything in space and can float around freely, their body shape and size does not change.

Question 30

Conductor

Answer 30

A material that allows electricity to flow through it

Question 31

Insulator

Answer 31

A material that does not allow electricity to flow through

Question 32

Examples of conductors

Answer 32

Metals, water

Question 33

Examples of insulators

Answer 33

Cotton, Fabric, rubber, etc.

Question 34

Galileo used a

Answer 34

telescope

Question 35

If the Earth were to spin faster on its axis what would happen

Answer 35

Shorter days and nights

Question 36

Every year

Answer 36

the earth orbits the sun

Question 37

The earth spins on its axis every

Answer 37

day