C9

Question 1

What was early life on earth?

Answer 1

Intense volcanic activity released lots of CO2, H2O(g), N2
Water condensed to form oceans - CO2 dissolved in them forming carbon precipitates and sediments in seabeds
Algae appeared and green plants evolved so photosynthesis took place so increase in O2 and decrease in CO2

Question 2

What are particulates?

Answer 2

Incomplete combustion
If inhaled stuck in lungs - respiratory problems
Smog - global dimming
Ensure a good supply of air when burning

Question 3

What is carbon monoxide?

Answer 3

Incomplete combustion
Inhaled - diffuses in blood - binds to haemoglobin - starving body from oxygen
Colourless and odourless
Ensure good supply air when burning

Question 4

What is sulfur dioxide?

Answer 4

Oxidation of sulfur impurities
Inhaled - damage to lungs
Acid rain
Don’t use fossil fuels

Question 5

What are nitrogen oxides?

Answer 5

Oxidation of nitrogen gas in air at high temps in internal combustion engines
Acid rain
Catalytic converter to avoid