Chemisrty Of The Atmosphere 2

Question 1

Describe phase 1 of the evolution of the atmosphere

Answer 1

Volcanoes gave out gases
Volcanoes erupted and gases released we think how the atmosphere formed. Mostly carbon dioxide, nitrogen and water vapour

Question 2

Explain phase 2 of the evolution of the atmosphere

Answer 2

Oceans, algae and green plants absorbed co2
Water vapor condensed and formed oceans where co2 dissolved, went through reactions to form carbonate precipitations = sediments
Green plants and algae absorbed co2 for photosynthesis

Question 3

Describe how sedimentary rocks are formed

Answer 3

Plants, plankton and marine life die and fall to seabed and get buried by later of sediment which over years will become compressed to for sedimentary rock

Question 4

What are crude oil and natural gas formed from

Answer 4

Deposits of plankton

Question 5

What os coal made from

Answer 5

Thick plant deposits

Question 6

Limestone is also a sedimentary rock. Mostly made from c….c….. Deposits from s….. And s….. Of marine organisms

Answer 6

Calcium carbonate

Shells skeletons

Question 7

Describe phase 3 of the evolution of the atmosphere

Answer 7

Green plants and algae produce oxygen

By photosynthesis

Question 8

Word equation for photosynthesis

Answer 8

Carbon dioxide + water -> glucose + oxygen

6co2 +6h2o -> c6h12o6 + 6o2

Question 9

Name 3 green house gasses

Answer 9

Carbon dioxide
Methane
Water vapour

Question 10

4 ways humans effect the green house gasses

Answer 10

• deforestation
• burning fossil fuels
• agriculture
• creating waste

Question 11

4. Ways climate change can effect us

Answer 11

1- increase in temperature, ice caps melting rise in sea level
2- changes to rainfall patterns
3- frequency and severity of storms may increase
4- changes in temperature and amount of water may affect wild spices

Question 12

What is carbon footprint

Answer 12

A measure of the amount of carbon dioxide and other greenhouse gases released over the full life cycle of somwthing

Question 13

3 ways we can reduce carbon footprint

Answer 13

Renewable energy source used instead of fossil fuels
Technology that catches carbon dioxide
Using more efficient processes could conserve energy and cut waste

Question 14

What are governments worried about making these changes in reducing carbon footprint

Answer 14

Will impact economic growth of communities which will be bad for peoples well being. Important in countries that are still developing

Question 15

What is released during complete combustion

Answer 15

Carbon dioxide

Water vapour

Question 16

If there isn’t enough oxygen all the fuels dont burn this is called

Answer 16

Incomplete combustion

Question 17

What happens in incomplete combustion

Answer 17

Solid particles of soot and unburned fuels are released and carbon, monoxide can be produced as well as co2

Question 18

Particles (soor) can call all sorts of problems name 2

Answer 18

• if inhaled can get stuck in lungs and cause damage

- bad for environment they reflect sun back to space = less light reaches earth global dimming

Question 19

Name 3 was carbon monoxide causes problems

Answer 19

• can stop blood from carrying oxygen around body

Binds to hemoglobin so less oxygen is carries

Question 20

Sulfur dioxide is released during the combustion of fossil fuels that contain sulfur impurities
What happens to the sulfur in the fuel

Answer 20

Becomes oxidized

Question 21

When are nitrogen oxides created

Answer 21

Reaction between oxygen and nitrogen in air caused by heat of burning

Question 22

When nitrogen oxides and sulfur dioxide mix with clouds what is formed and what happens

Answer 22

Dilute sulfuric acid
Dilute nitric acid
They fall as acid rain

Question 23

What gases are in the air today

Answer 23

Nitrogen 78%
Oxygen 21%
Argon 1%
Carbon dioxide 0.037%