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Flashcards in C1 - Air quality Deck (44)
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1

Dry air contains
21% -

Oxygen O2

2

Dry air contains
1% - And small amounts of other gasses

Argon (Ar)

3

oxygen gas + most metal =

Solid metal oxides

4

Dry air contains
78% -

Nitrogen (N2)

5

When was the earths atmosphere formed?

4 billion yrs ago

6

How was the atmosphere formed?

-Gasses came from the volcanoes
-As the atmosphere cooled the gasses condensed forming the sea.
-3 billion yrs later bacteria evolved (photosynthesis) removing the CO2 from the atmosphere.

7

How are fossil fuels made?

Dead plants and animals are buried. As they get buried deeper under more dead animals and plants the pressure grows fossil fuels are eventually made.

8

How was sedimentary rock formed?

Carbon dioxide dissolve in the sea reacts with the salt = calcium carbonate. This forms sediment, which gets buried and cemented. Forming sedimentary rock.

9

Examples of fossil fuels

Gas, oil, coal

10

What are pollutants?

Gasses that are harmful to your health.
e.g. Carbon dioxide/ monoxide, nitrogen oxides, sulphur dioxide

11

Examples of polutants

e.g. Carbon dioxide/ monoxide, nitrogen oxides, sulphur dioxide

12

What are particulates?

Particles released from burning fuel that float in the air. E.g. Carbon (soot)

13

What makes acid rain?

Sulphur dioxide + nitrogen = acid rain

14

Sulphur dioxide in the air can trigger...

Asthma

15

What does ppm/ ppb stand for?

Parts per million/ billion

16

Only contains Carbon + hydrogen atoms:

Hydrocarbons

17

Give examples of hydrocarbons

Petrol
Diesel
Fuel oil

18

Hydrocarbons + oxygen =

Carbon dioxide + water (+energy)

19

+ O2 =

Oxidisation

20

- O2

Reduction

21

O2 reaction =

Combustion

22

What happen to atoms in a reaction?

They can rearrange but not change.

23

In a reaction atoms of non- metal elements join to form to make

Molecules

24

What happen to elements in a reaction?

They rearrange = new compound
Reactants are rearranged to new products with different properties.

25

-It is an indirect polutant
-When burned it produces a colourless gas
- can be found in coal

What is it?

Sulphur

26

How is carbon monoxide formed?

When a fuel is burned but there is not enough O2 available. - at a very high temperature.

27

What pollutants do car engines let out?

Nitrogen oxide
Carbon dioxide ...

28

NO and NO2 are both found in the atmosphere, which one makes acid rain?

NO

29

What is Wet scrubbing

What is it called when sulphur dioxide is removed from power station waste, using the alkaline slurry, gypsum ( calcium +water)
Or sea water ( natural alkaline)

30

What is flue gas desulphurisation?

Removing sulphur dioxide from waste gasses.