KS3 Revision † Science Revision/Flashcards_A4... · KS3 Revision † Science KS3 Revision †...

Cel

ls –

th

e B

uild

ing

B

lock

s o

f Lif

e C

ells

– t

he

Bu

ildin

g

Blo

cks

of L

ife

Eati

ng

, Dri

nk

ing

an

d

Bre

ath

ing

Ea

tin

g, D

rin

kin

g a

nd

B

reat

hin

g

Get

tin

g t

he

Ener

gy

you

r B

od

y N

eed

s

Name the three

cell structures that are found

in plant cells, but not in

animal cells.

What is gestation?

Give three ways in which

alveoli are adapted for gas

exchange.

Describe what happens to

someone when they suffer

from an asthma attack.

What is meant by the term

antagonistic pair?

1

2

3

4

5

Cel

ls –

th

e B

uild

ing

B

lock

s o

f Lif

e C

ells

– t

he

Bu

ildin

g

Blo

cks

of L

ife

Eati

ng

, Dri

nk

ing

an

d

Bre

ath

ing

Ea

tin

g, D

rin

kin

g a

nd

B

reat

hin

g

Get

tin

g t

he

Ener

gy

you

r B

od

y N

eed

s

1

2

3

4

5

The vacuole, cell wall and

chloroplast are three cell

structures found in plant cells,

but not animal cells.

Gestation is the process of

the embryo developing in

the uterus.

Alveoli are adapted for gas

exchange by having:

• thin, moist walls

• a good blood supply

• a large surface area.

When someone has an asthma

attack the bronchioles narrow,

which reduces the space for

air to enter. Less air inside

the lungs means less oxygen

is absorbed into the blood,

leaving the sufferer gasping

for breath.

An antagonistic pair is when

one muscle contracts and the

other relaxes.

KS3 Revision • Science





chloroplastvacuole

cell wall

Get

tin

g t

he

Ener

gy

you

r B

od

y N

eed

s

Loo

kin

g a

t P

lan

ts a

nd

Ec

osy

stem

s Lo

ok

ing

at

Pla

nts

an

d

Eco

syst

ems

Var

iati

on

for

Surv

ival

V

aria

tio

n fo

r Su

rviv

al

What is the word equation

for aerobic respiration?

What is needed for

photosynthesis to take place?

What does the term

bioaccumulation mean?

Name the scientists who

deduced and then published

the structure of DNA in 1952.

Explain the purpose of a

gene bank.

6

7

8

9

10

Get

tin

g t

he

Ener

gy

you

r B

od

y N

eed

s

Loo

kin

g a

t P

lan

ts a

nd

Ec

osy

stem

s Lo

ok

ing

at

Pla

nts

an

d

Eco

syst

ems

Var

iati

on

for

Surv

ival

V

aria

tio

n fo

r Su

rviv

al

6

7

8

9

10

The word equation for

aerobic respiration is:

Carbon dioxide, water, light

and chlorophyll are needed for

photosynthesis to take place.

Bioaccumulation describes the

build-up of toxic materials in

the organisms that are at the

top of the food chain.

The scientists who deduced the

structure of DNA were James

Watson and Francis Crick.

A gene bank stores seeds and

cells from as many organisms

as possible. This is to ensure

that no genes are lost due

to extinction. The genes may

be helpful in the future to

provide medicines or food.






glucose + oxygen carbon dioxide

+ water + energy

Var

iati

on

for

Surv

ival

O

ur

Hea

lth

an

d t

he

Effe

cts

of D

rug

s

Ou

r H

ealt

h a

nd

th

e Ef

fect

s o

f Dru

gs

M

ixin

g, D

isso

lvin

g a

nd

Se

par

atin

gM

ixin

g, D

isso

lvin

g a

nd

Se

par

atin

gIf an adult body

cell of a wolf contains 78

chromosomes, how many

chromosomes will be in a

wolf’s sperm cell?

What are the three different

types of microbes that can

cause disease?

Drugs can be divided into

four main groups. What are

these groups?

What is meant when a

chemist says that a substance

is pure?

What is the law of

conservation of mass?

11

12

13

14

15

Var

iati

on

for

Surv

ival

O

ur

Hea

lth

an

d t

he

Effe

cts

of D

rug

s

Ou

r H

ealt

h a

nd

th

e Ef

fect

s o

f Dru

gs

M

ixin

g, D

isso

lvin

g a

nd

Se

par

atin

gM

ixin

g, D

isso

lvin

g a

nd

Se

par

atin

g

11

12

13

14

15

The number of chromosomes in

a wolf’s sperm cell will be 39.

Adult body cells have two pairs

of every chromosome, so

78 ÷ 2 = 39

The three different types

of microbes that can cause

disease are:

• bacteria

• viruses

• fungi.

The four main groups of

drugs are:

• painkillers

• depressants

• stimulants

• hallucinogens.

A substance is pure when it

only contains one type of

atom or compound.

The law of conservation

of mass states that in any

physical change or chemical

reaction, the mass after the

change will be the same as

the mass before the change.






Elem

ents

, Co

mp

ou

nd

s an

d R

eact

ion

sEl

emen

ts, C

om

po

un

ds

and

Rea

ctio

ns

Exp

lain

ing

Ph

ysic

al

Ch

ang

esEx

pla

inin

g C

hem

ical

C

han

ges

Exp

lain

ing

Ch

emic

al

Ch

ang

es

In a reaction, magnesium

reacts with oxygen to form

what compound?

How many atoms are in

a molecule of maltose,

C12H22O11?

What name is given to a

reaction that produces heat

energy?

When a

hydrocarbon fuel is burned

in excess oxygen, what gas is

produced as a product?

What products are formed

when an acid reacts with

a metal?

16

17

18

19

20

Elem

ents

, Co

mp

ou

nd

s an

d R

eact

ion

sEl

emen

ts, C

om

po

un

ds

and

Rea

ctio

ns

Exp

lain

ing

Ph

ysic

al

Ch

ang

esEx

pla

inin

g C

hem

ical

C

han

ges

Exp

lain

ing

Ch

emic

al

Ch

ang

es

16

17

18

19

20

The compound formed in the

reaction between magnesium

and oxygen is magnesium

oxide.

There are 45 atoms in a

molecule of maltose.

(12 × C) + (22 × H) + (11 × O)

A reaction that produces

heat energy is called an

exothermic reaction.

When a hydrocarbon fuel is

burned in the presence of

excess oxygen, carbon dioxide

gas is produced.

The products salt and

hydrogen are formed when

an acid reacts with a metal.






Ob

tain

ing

Use

ful

Mat

eria

lsO

bta

inin

g U

sefu

l M

ater

ials

Ob

tain

ing

Use

ful

Mat

eria

lsU

sin

g o

ur

Eart

h

Sust

ain

ably

Usi

ng

ou

r Ea

rth

Su

stai

nab

ly

What happens in a

displacement reaction?

What is the chemical reason

why carbon displaces iron

from its ore?

In pottery, what has to

happen to clay in order to

make a ceramic?

What are the three main

rock types?

According to

scientists, what is the main

cause of the increased carbon

dioxide levels on our planet

today?

21

22

23

24

25

Ob

tain

ing

Use

ful

Mat

eria

lsO

bta

inin

g U

sefu

l M

ater

ials

Ob

tain

ing

Use

ful

Mat

eria

lsU

sin

g o

ur

Eart

h

Sust

ain

ably

Usi

ng

ou

r Ea

rth

Su

stai

nab

ly

21

22

23

24

25

In a displacement reaction the

metal that is in a compound

is displaced by another metal

that is higher up in the

reactivity series.

Iron is lower in the reactivity

series than carbon, so carbon

displaces it.

A ceramic is made by

heating the clay at a high

temperature in an oven / kiln.

The three main rock types are:

• igneous

• sedimentary

• metamorphic.

The increased carbon dioxide

levels are due to human

activity, mainly burning fossil

fuels.






Usi

ng

ou

r Ea

rth

Su

stai

nab

lyFo

rces

an

d t

hei

r Ef

fect

sFo

rces

an

d t

hei

r Ef

fect

sFo

rces

an

d t

hei

r Ef

fect

sFo

rces

an

d t

hei

r Ef

fect

s

Explain why carbon dioxide

causes climate change.

For an object to

speed up or slow down, what

has to happen to the forces

acting on that object?

A boy weighing

80 N is sitting at the

end of a seesaw, 2 m from the

pivot. What is the moment?

How does Hooke’s Law apply

to a spring?

What is the formula used to

calculate speed?

26

27

28

29

30

Usi

ng

ou

r Ea

rth

Su

stai

nab

lyFo

rces

an

d t

hei

r Ef

fect

sFo

rces

an

d t

hei

r Ef

fect

sFo

rces

an

d t

hei

r Ef

fect

sFo

rces

an

d t

hei

r Ef

fect

s

26

27

28

29

30

Carbon dioxide causes

climate change because it

is a greenhouse gas. The

more carbon dioxide, the

more energy from the

sun is trapped. This causes

temperatures to rise and

unpredictable changes

to weather patterns.

The forces on the object

must become unbalanced. If

the forward force is greater,

the object will speed up. If

the force in the opposite

direction to movement is

greater, then the object

will slow down.

The moment is 160 Nm.

Moment = Force × Distance from pivot

Hooke’s Law states that the

stretch of the spring will be

directly proportional to the

force applied to it.

Speed = Distance

Time






ts

d

Forc

es a

nd

th

eir

Effe

cts

Exp

lori

ng

Co

nta

ct a

nd

N

on

-Co

nta

ct F

orc

esEx

plo

rin

g C

on

tact

an

d

No

n-C

on

tact

Fo

rces

Exp

lori

ng

Co

nta

ct a

nd

N

on

-Co

nta

ct F

orc

esM

oti

on

on

Ear

th a

nd

in

Sp

ace

In physics, what is meant by

the term work?

What would happen if two

magnets with the same poles

were brought together?

What is the formula for pressure?

What is the formula for weight?

Why are shadows

of objects longer at noon in

winter in Northern latitudes?

31

32

33

34

35

Forc

es a

nd

th

eir

Effe

cts

Exp

lori

ng

Co

nta

ct a

nd

N

on

-Co

nta

ct F

orc

esEx

plo

rin

g C

on

tact

an

d

No

n-C

on

tact

Fo

rces

Exp

lori

ng

Co

nta

ct a

nd

N

on

-Co

nta

ct F

orc

esM

oti

on

on

Ear

th a

nd

in

Sp

ace

31

32

33

34

35

Work is only done when a

force has acted on an object

and that object has changed.

The poles are the same, so

the magnets would repel.

Pressure = Force

Area

Weight = Mass × Gravitational Field Strength

Shadows are longer at

noon in winter in Northern

latitudes because the sun

appears lower in the sky, so

the light shines on the object

from a smaller angle.






AP

F

gm

W

Ener

gy

Tran

sfer

s an

d

Sou

nd

Mag

net

ism

an

d

Elec

tric

ity

Mag

net

ism

an

d

Elec

tric

ity

Mag

net

ism

an

d

Elec

tric

ity

Wav

es a

nd

En

erg

y Tr

ansf

er

What do we mean when

we say that a wave has a

frequency?

What makes a parallel circuit

different to a series circuit?

What is the formula for

resistance?

Give three ways in which an

electromagnet can be made

more powerful.

State the Law of Reflection.

36

37

38

39

40

Ener

gy

Tran

sfer

s an

d

Sou

nd

Mag

net

ism

an

d

Elec

tric

ity

Mag

net

ism

an

d

Elec

tric

ity

Mag

net

ism

an

d

Elec

tric

ity

Wav

es a

nd

En

erg

y Tr

ansf

er

36

37

38

39

40

The frequency of a wave is

the number of waves per

second, measured in Hz.

A parallel circuit has branches

through which the current

is divided, whereas a series

circuit has only one route for

the current to flow.

Resistance = Voltage

Current

An electromagnet can be

made more powerful by:

• increasing the number of

coils in the wire

• increasing the current

• adding a core made from

a magnetic material, e.g.

iron.

The Law of Reflection is:

The angle of incidence

= The angle of reflection






RI

V

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