What is the composition of the Earth's atmosphere? (Select 4)
78% Nitrogen
78% Oxygen
12% Oxygen
21% Oxygen
21% Nitrogen
1% Argon
Small amounts of oxygen, nitrogen, and argon.
Small amounts of water vapour, carbon dioxide, and other gases.
What was the first source of oxygen on the Earth?
Photosynthetic Organisms evolved
Plants started to grow
Carbon Dioxide adapted
Which of the following Pollutants can cause acid rain?
Carbon Dioxide
Nitrogen Oxides
Sulphur Dioxides
Particulates
Carbon Monoxide
Which two measures are best used for measuring the concentration of pollutants in the air?
Parts per billion (ppb)
Parts per million (ppm)
Parts per hundred (pph)
Parts per thousand (ppt)
Which of the following is smallest?
Atom
Substance
Element
Compound
What happens to the number of atoms during a chemical reaction?
Stays the same
Increases
Decreases
What dangerous molecules are produced from incomplete combustion? (Select 3)
Carbon Particulates
Sulphur Dioxide
Water
What condition is needed for Nitrogen and Oxygen to react?
High Temperature
Low Temperature
They never react
Underwater
Which of the following is NOT a solution to reducing Power Station emissions?
Removing sulphur from fossil fuels before burning them
Using alternative renewable sources of energy
Removing sulphur from chimneys with the 'wet scrubbing' process
Removing sulphur as it is produced with a vacuum method
Which of the following is NOT a way emissions from Road Transport is currently being reduced?
Using public transport
Installing catalytic converters in vehicles
Exhaust emissions legally limited, enforced by MOT tests
All fuels must be sulphur-free
