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Question 1.

Which gas makes up 78% of the atmosphere?

Nitrogen.

Answer 1. (click to reveal answer)

Click to return to game board

Question 2.

Answer 2.

Earth’s earliest atmosphere contained carbon dioxide and water vapour and was formed by

Volcanic activity

(click to reveal answer)


Question 3.

Answer 3.

How did the oceans form?

The water vapour condensed when the Earth cooled down



Question 4.

Answer 4.

How did plants change Earth’s atmosphere?

Using photosynthesis to convert carbon dioxide into oxygen.



Question 5.

Answer 5.

Name 3 types of pollutant?

Any 3 from; sulfur dioxide, nitrogen oxides, carbon monoxide, particulates of carbon and carbon dioxide.



Question 6.

Answer 6.

Name 4 gases that make up our atmosphere?

Nitrogen, oxygen, carbon dioxide, argon, water vapour



Question 7.

Answer 7.

What compounds only contain hydrogen and carbon?

Hydrocarbons



Question 8.

Answer 8.

What 2 products are formed when hydrocarbons are burned in enough oxygen (complete combustion)?

Carbon dioxide and water



Question 9.

Answer 9.

What is the name of the reaction when a substance chemically combines with oxygen?

Oxidation.



Question 10.

Answer 10.

The name given to a reaction when a compound loses oxygen?

Reduction



Question 11.

Answer 11.

True or false – the number of atoms change during a chemical reaction.

False – the atoms are simply rearranged.



Question 12.

Answer 12.

These are known as the starting materials of a reaction?

Reactants



Question 13.

Answer 13.

How are nitrogen oxides formed?

From the reaction between atmospheric nitrogen and oxygen at the high temperatures inside engines.



Question 14.

Answer 14.

Which 2 pollutants form acid rain?

Sulfur dioxide and nitrogen oxides



Question 15.

Answer 15.

Which pollutant causes buildngs to become dirty?

Particulates of carbon (soot)



Question 16.

Answer 16.

Name the 2 ways that carbon dioxide is removed from the atmosphere?

1. Absorbed by plants (photosynthesis).

2. Dissolved in oceans and rain water.



Question 17.

Answer 17.

Give 2 ways that pollutants from power stations can be reduced?

1. Using less electricity

2. Removing sulfur from natural gas and fuel oil

3. Removing sulfur dioxide and particulates from the flue gases emitted by coal-burning power stations



. using less electricityb. removing sulfur from natural gas and fuel oilc. removing sulfur dioxide and particulates from the flue gases emitted by coal-burning power stations

Question 18.

Answer 18.

1. Burning less fuel, for example by having more efficient engines

2. Using low sulfur fuels

3. Using catalytic converters.

4. More public transport

5. Having legal limits to exhaust emissions (which are enforced by the use of MOT tests).



Give 3 ways pollutants from exhaust emissions can be reduced?

Question 19.

Answer 19.

Give 2 alternatives to fossil fuels in cars?

Electricity and biofuels.



Question 20.

Answer 20.

What does coal mainly contain?

Carbon.



Question 21.

Answer 21.

True or false; fuels burn more rapidly in pure oxygen than in air?

True.



Question 22.

Answer 22.

True or false, air is a mixture of different gases consisting of large molecules with small spaces between them.

False - air is a mixture of different gases consisting of small molecules with large spaces between them



Question 23.

Answer 23.

Which gas makes up 21% of the Earth’s atmosphere?

Oxygen.



Question 24.

Answer 24.

Which gas makes up 1% of the Earth’s atmosphere?

Argon



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