year 8 science

Question 1

What is scurvy caused by and what does it do?

Answer 1

Lack of vitamin c
causes painful joints and bleeding gums

Question 2

What is kwashiorkor caused by and what does it do?

Answer 2

Lack of protein
causes a pot belly

Question 3

What are symptoms of anaemia and what’s its caused by ?

Answer 3

Tiredness and shortness of breath
Lack of iron

Question 4

What do Enzymes do?

Answer 4

Substances that speed up digestion

Question 5

What three parts do plant cells have that animal cells don’t?

Answer 5

Chloroplast
Vacuole
Cell wall

Question 6

How does oxygen enter the body?

Answer 6

By diffusion

Question 7

What are the 5 Kingdoms

Answer 7

Fungi
Animal
Plants
Monerans
Protists

Question 8

What Kingdom doesn’t have a nucleus

Answer 8

Monerans( Bacteria )

Question 9

What are the 7 processes all living things need to carry out (hint Mrs Nerg)

Answer 9

Movement
Respiration
Sensitivity
Nutrition
Execration
Reproduction
Growth

Question 10

What is aerobic respiration?

Answer 10

A type of respiration in which oxygen is used to release energy from a substance such as glucose

Question 11

What is anaerobic respiration?

Answer 11

A type of respiration that does not need oxygen

Question 12

What is protein needed for?

Answer 12

Growth and Repair

Question 13

What is fat needed for?

Answer 13

Stored to use energy in the future

Question 14

What are carbohydrates needed for?

Answer 14

Is the body’s main source of energy.

Question 15

What does
Zinc + Oxygen =

Answer 15

Zinc oxide

Question 16

What three things fire needs to stay alight?

Answer 16

Fuel
Oxygen
Heat

Question 17

What does
Sulfur + Oxygen =

Answer 17

Sulfur dioxide

Question 18

What is acid rain mostly caused by?

Answer 18

Sulfur dioxide and nitrogen oxides dissolved in rainwater

Question 19

What is the word equation for rusting?

Answer 19

Iron + Water = Iron
+ Oxygen Hydroxide

Question 20

How do you test for Hydrogen?

Answer 20

You use the “squeaky pop” test

Question 21

What is Density?

Answer 21

It is the amount of mass in a specific amount of space

Question 22

How do you find the Density?

Answer 22

Mass/Volume

Question 23

What is upthrust?

Answer 23

A force that pushes objects upwards in a liquid

Question 24

What is a Vacuum?

Answer 24

A completely empty space containing no partials

Question 25

What is the Law of Reflection?

Answer 25

The angel of incidence= The angel of Reflation

Question 26

What are the 3 Primary colours in light?

Answer 26

Red
Blue
Green

Question 27

What are the 3 secondary colours in light?

Answer 27

Yellow
Cyan
Magenta

Question 28

What happens to light going through a convex lens?

Answer 28

It moves inwards

Question 29

What happens to light going through a concave lens?

Answer 29

it move outwards

Question 30

If a light ray hits a block of glass at an angle its _________ ___ _____ changes. Fill in the gaps in this sentence.

Answer 30

Diction and speed

Question 31

What happens to light when it hits a black object?

Answer 31

It is obsorbed

Question 32

What does a Sankey diagram show?

Answer 32

How well a machine uses energy

Question 33

What are the 9 types of energy?

Answer 33

Light
Thermal
Sound
Electrical
Nuclear
Chemical
Gravitational potential
Elastic
Kinetic

Question 34

What is the Unit for measuring energy?

Answer 34

Joule ( J )

Question 35

What is efficiency?

Answer 35

The amount of useful energy

Question 36

Heat _____. Fill in the missing word

Answer 36

Rises

Question 37

What are the 9 planets in the solar system (put then in order from the closest to the sun to the furthest away)?

Answer 37

Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto

Question 38

How to find out Weight?

Answer 38

Weight=Mass x Gravitational field strength

Question 39

What are the 8 Phases of the moon?

Answer 39

Full
Waxing Gibbous
First Quarter Half
Waxing Crescent
New
Waning Crescent
Last Quarter Half
Waning Gibbous

Question 40

What does luminous mean?

Answer 40

Objects the emit light