Science

Question 1

How can you find out which materials contain carbonates?

Answer 1

Carbon dioxide is formed when an acid is added to a carbonate as it is a gas, you can see it as it fizz’s.

Question 2

What is the percentage of gases in the air?

Nitrogen -
Oxygen -
Argon -
Other -

Answer 2

Nitrogen - 78%
Oxygen - 21 %
Argon - 0.65%
Other - 0.35%

Question 3

What three things do you need to make fire / combustion?

Answer 3

Oxygen, heat, fuel

Question 4

When is monoxide produced from fuels rather than carbon dioxide? Why does it kill people?

Answer 4

When there fuel does not have enough oxygen and the methane cannot burn the flame turns yellow. Some of the carbon combines with oxygen to form carbon monoxide.
It has no smell & you can’t see it.

Question 5

What free factors make an explosion?

Answer 5

Large amount of gas
A lot of heat
Plenty of oxygen is available

Question 6

What is a good conductor of electric?

Answer 6

Metals

Question 7

Poor conductors of electric?

Answer 7

Wood & plastics

Question 8

What do you use to measure electric current?

Answer 8

Ammeter

Question 9

Two things you need to make something work using electricity?

Answer 9

Something to make electricity flow e.g. Cell

A complete circuit for the electricity to flow around

Question 10

What does a fuse do?

Answer 10

It is designed to melt if the current gets to big

Question 11

Eggs cells are released from?

Answer 11

Ovary

Question 12

A baby develops in the?

Answer 12

Uterus

Question 13

Sperm cells are made in the

Answer 13

Testis

Question 14

A woman release an egg every?

Answer 14

Every 28 days for around 35 years

Question 15

A baby is ready to be born ?

Answer 15

9 months

Question 16

How long & how often is the menstruation cycle?

Answer 16

28 days last 3 to 7 days

Question 17

If a woman misses a period what may have happened?

Answer 17

She is pregnant

Question 18

Where will one end of a magnet point if it is free to turn?

Answer 18

North

Question 19

Magnetic fields always go?

Answer 19

North to South

Question 20

What is a electromagnet ?

Answer 20

A coil of wire with a current flowing through it

Question 21

How can you make an electromagnet stronger?

Answer 21

More wire, using a higher current, using a core made from a more magnetic material

Question 22

When does a coil of wire become a magnet?

Answer 22

When the switch is turned on

Question 23

What taste do all acids have in common?

Answer 23

Sharp e.g. Orange, lemon

Question 24

What is another name for vitamin C?

Answer 24

Ascorbic acid

Question 25

Acid can corrosive true or false?

Answer 25

True

Question 26

What does the rainbow chart measure?

Answer 26

PH scale to measure acids

Question 27

What is a chemical reaction?

Answer 27

Colour change
Gas produced
Temperature change 
New substance
Permanent or irreversible