1. 2 1 3 5 4 9 8 7 6 16 15 14 13 12 11 10 21 20 19 18 17 24 23 22 Click hexagons once to change to blue Twice to change to white Click a third time to restore to yellow End Show  Click in the red number-square to select question

2. Question 1. Which gas makes up 78% of the atmosphere? Nitrogen. Answer 1. (click to reveal answer) Click to return to game board

3. Question 2. Answer 2. Earth’s earliest atmosphere contained carbon dioxide and water vapour and was formed by Volcanic activity (click to reveal answer) Click to return to game board

4. Question 3. Answer 3. How did the oceans form? The water vapour condensed when the Earth cooled down (click to reveal answer) Click to return to game board

5. Question 4. Answer 4. How did plants change Earth’s atmosphere? Using photosynthesis to convert carbon dioxide into oxygen. (click to reveal answer) Click to return to game board

6. Question 5. Answer 5. Name 3 types of pollutant? Any 3 from; sulfur dioxide, nitrogen oxides, carbon monoxide, particulates of carbon and carbon dioxide. (click to reveal answer) Click to return to game board

7. Question 6. Answer 6. Name 4 gases that make up our atmosphere? Nitrogen, oxygen, carbon dioxide, argon, water vapour (click to reveal answer) Click to return to game board

8. Question 7. Answer 7. What compounds only contain hydrogen and carbon? Hydrocarbons (click to reveal answer) Click to return to game board

9. Question 8. Answer 8. What 2 products are formed when hydrocarbons are burned in enough oxygen (complete combustion)? Carbon dioxide and water (click to reveal answer) Click to return to game board

10. Question 9. Answer 9. What is the name of the reaction when a substance chemically combines with oxygen? Oxidation. (click to reveal answer) Click to return to game board

11. Question 10. Answer 10. The name given to a reaction when a compound loses oxygen? Reduction (click to reveal answer) Click to return to game board

12. Question 11. Answer 11. True or false – the number of atoms change during a chemical reaction. False – the atoms are simply rearranged. (click to reveal answer) Click to return to game board

13. Question 12. Answer 12. These are known as the starting materials of a reaction? Reactants (click to reveal answer) Click to return to game board

14. Question 13. Answer 13. How are nitrogen oxides formed? From the reaction between atmospheric nitrogen and oxygen at the high temperatures inside engines. (click to reveal answer) Click to return to game board

15. Question 14. Answer 14. Which 2 pollutants form acid rain? Sulfur dioxide and nitrogen oxides (click to reveal answer) Click to return to game board

16. Question 15. Answer 15. Which pollutant causes buildngs to become dirty? Particulates of carbon (soot) (click to reveal answer) Click to return to game board

17. 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. (click to reveal answer) Click to return to game board

18. 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 (click to reveal answer) Click to return to game board. using less electricity b. removing sulfur from natural gas and fuel oil c. removing sulfur dioxide and particulates from the flue gases emitted by coal-burning power stations

19. 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). (click to reveal answer) Click to return to game board Give 3 ways pollutants from exhaust emissions can be reduced?

20. Question 19. Answer 19. Give 2 alternatives to fossil fuels in cars? Electricity and biofuels. (click to reveal answer) Click to return to game board

21. Question 20. Answer 20. What does coal mainly contain? Carbon. (click to reveal answer) Click to return to game board

22. Question 21. Answer 21. True or false; fuels burn more rapidly in pure oxygen than in air? True. (click to reveal answer) Click to return to game board

23. 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 (click to reveal answer) Click to return to game board

24. Question 23. Answer 23. Which gas makes up 21% of the Earth’s atmosphere? Oxygen. (click to reveal answer) Click to return to game board

25. Question 24. Answer 24. Which gas makes up 1% of the Earth’s atmosphere? Argon (click to reveal answer) Click to return to game board