C1

Question 1

Whats phase 2?

Answer 1

• co2 dissolved in oceans
• marine organisms developed
• green plants developed
• green plants removed co2
• so oxygen increased

Question 2

Whats phase 3?

Answer 2

• buildup or oxygen made organisms flourish
• oxygen created ozone layer
• little co2 left and alot of oxygen

Question 3

What is phase 1 of the atmosphere?

Answer 3

• everything was molten
• everything cooled
• crust was formed
• volcanoes erupted
• gave out co2 and water vapour
• oceans formed when water vapour condensed

Question 4

Two detailed features of sedimentry rock?

Answer 4

• contain fossils because they are formed at low temperatures so dead organisms arent destroyed
• easily eroded by weathering

Question 5

How are metamorphic rocks formed?

Answer 5

Heat and pressure on sedimentry or igneous rocks over long periods of time causes metamorphic rocks.

Question 6

Example of metamorphic rock?

Answer 6

Marble

Question 7

How is igneous rocks formed?

Answer 7

When molten magma pushes up into the crust before cooling and solidifying.

Question 8

What is extrusive?

Answer 8

Igneous rocks cooled quickly above ground … SMALL CRYSTALS

Question 9

Whats intrusive rocks?

Answer 9

Igneous rocks cool slowly… Forms BIG crystals

Question 10

Example of igneous?

Answer 10

Granite

Question 11

Whats four examples of limestone use?

Answer 11

• building materials
• cement
• concrete
• glass

Question 12

Three positives of quarrying limestone?

Answer 12

-provides materials for houses roads and dyes
-used to neutralise acidic soil caused by acid rain
-used in chimneys to neutralise sulfur dioxide
Provides jobs

Question 13

Negatives of quarrying limestone?

Answer 13

• causes alot of noise pollution
• limestone needs to be moved with vehicles (co2)
• destroys habitats
• is ugly and ruins landscapes

Question 14

Equation for any neutralisation reaction?

Answer 14

Acid+base->salt+water

Question 15

Whats the test for chlorine?

Answer 15

Bleaches damp blue litmus paper turning it white

Question 16

Test for hydrogen?

Answer 16

‘Squeaky pop test’ put a lighted splint in and it will pop

Question 17

Test for oxygen

Answer 17

Use a lit splint and if it goes out and relights its oxygen

Question 18

What is oxidation?

Answer 18

Gain of oxygen and loss of electrons

Question 19

Whats reduction

Answer 19

Loss of oxygen and gain of electrons

Question 20

Three properties of a metal?

Answer 20

• strong
• conducting heat
• conduct electricity

Question 21

Why are alloys stronger than pure metals?

Answer 21

They have different sized particles so it makes it harder for the layers of particles to slide and thus makes it stronger

Question 22

What can shape memory alloys be used for?

Answer 22

Glasses frames and stents for damaged blood vessels

Question 23

Four reasons to recycle?

Answer 23

• uses less resources
• uses less energy
• uses less money
• makes less rubbish

Question 24

When does complete combustion happen?

Answer 24

When theres alot of oxygen about

Question 25

When does incomplete combustion happen?

Answer 25

If there isnt enough oxygen available

Question 26

What does complete combustion create?

Answer 26

carbon dioxide and water

Question 27

What does incomplete combustion make?

Answer 27

Carbon, carbon monoxide and water

Question 28

what does sulfur dioxide create?

Answer 28

Causes acid rain

Question 29

What does acid rain cause?

Answer 29

• lakes to become acidic -> plants&animals die
• kills trees
• human health problems

Question 30

Two advantages of biogas?

Answer 30

• its renewable

- removes co2 from atmosphere

Question 31

What turns bromine water orange..why?

Answer 31

alkanes cause theres no spare bonds

Question 32

What decolourises it?

Answer 32

Alkenes cause theres spare bonds for it to stick to

Question 33

Why do we crack long chain hydrocarbons?

Answer 33

To meet high demands of short chain hydrocarbons

Question 34

How do we crack them?

Answer 34

Through thermal decomposition which is breaking them down into simpler molecules