1 4.1 | CELL BIOLOGY | QUESTION PAPER 1 Score Percentage % AQA CHEMISTRY Time allowed GCSE
Chemistry of the Atmosphere
Carbon Dioxide & Methane as Greenhouse Gases 1
65 minutes /54 QUESTION PAPER Q8. The amount of carbon dioxide in the atmosphere is increased by reactions that occur in internal combustion engines ( X) and is decreased by reactions in sea water ( Y). Describe, in as much detail as you can, the reactions which take place at X and Y. (a) X ................................................................................................................................. ............................................................................................................................. ........ ........................ ............................................................................................................. ............................................................................................................................. ........ (2) (b) Y ................................................................................................................................. ................................... .................................................................................................. ............................................................................................................................. ........ ....................... .............................................................................................................. (3) (Total 5 marks) Q7. For 200 million years the proportions of the different gases in the atmosphere have been much the same as today. Over the past 150 years the amount of carbon dioxide in the atmosphere has increased from 0.03% to 0.04%. (a) Describe how carbon dioxide is released into the atmosphere: (i) by human and industrial activity; ........................................................................................................................... ........................................................................................................................... ........................................................................................................................... ........ ................................................................................................................... (2) (ii) from carbonate rocks by geological activity. .................................................................................. ......................................... ........................................................................................................................... ........................................................................................................................... ........................................................................................................................... (2) (b) Explain how the seas and oceans can decrease the amount of carbon dioxide in the atmosphere. ............................................................................................................................. ........ ................................................................................................................ ..................... ............................................................................................................................. ........ .................................................................................................... ................................. ............................................................................................................................. ........ ...................................... ............................................................................................... (3) (c) (i) Give one reason why the amount of carbon dioxide in the atmosphere is increasing gradually. ........................................................................................................................... ........................................................................................................................... (1) (ii) Give one effect that increasing levels of carbon dioxide in the atmosphere may have on the environment. ........................................................................................................................... ................................................................ ........................................................... (1) (Total 9 marks)
Chemistry of the Atmosphere
Carbon Dioxide & Methane as Greenhouse Gases 1
65 minutes /54 QUESTION PAPER Q8. The amount of carbon dioxide in the atmosphere is increased by reactions that occur in internal combustion engines ( X) and is decreased by reactions in sea water ( Y). Describe, in as much detail as you can, the reactions which take place at X and Y. (a) X ................................................................................................................................. ............................................................................................................................. ........ ........................ ............................................................................................................. ............................................................................................................................. ........ (2) (b) Y ................................................................................................................................. ................................... .................................................................................................. ............................................................................................................................. ........ ....................... .............................................................................................................. (3) (Total 5 marks) Q7. For 200 million years the proportions of the different gases in the atmosphere have been much the same as today. Over the past 150 years the amount of carbon dioxide in the atmosphere has increased from 0.03% to 0.04%. (a) Describe how carbon dioxide is released into the atmosphere: (i) by human and industrial activity; ........................................................................................................................... ........................................................................................................................... ........................................................................................................................... ........ ................................................................................................................... (2) (ii) from carbonate rocks by geological activity. .................................................................................. ......................................... ........................................................................................................................... ........................................................................................................................... ........................................................................................................................... (2) (b) Explain how the seas and oceans can decrease the amount of carbon dioxide in the atmosphere. ............................................................................................................................. ........ ................................................................................................................ ..................... ............................................................................................................................. ........ .................................................................................................... ................................. ............................................................................................................................. ........ ...................................... ............................................................................................... (3) (c) (i) Give one reason why the amount of carbon dioxide in the atmosphere is increasing gradually. ........................................................................................................................... ........................................................................................................................... (1) (ii) Give one effect that increasing levels of carbon dioxide in the atmosphere may have on the environment. ........................................................................................................................... ................................................................ ........................................................... (1) (Total 9 marks)
