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General Certificate of Secondary Education Foundation Tier January 2011

1 2 3 4 5 6 7 8

Applied Science (Double Award)
Unit 2 Science for the Needs of Society Written Paper Thursday 13 January 2011
For this paper you must have: a ruler. You may use a calculator.

APSC/2F

F

9.00 am to 10.30 am

9 TOTAL

Time allowed  1 hour 30 minutes Instructions  Use black ink or black ball-point pen.  Fill in the boxes at the top of this page.  Answer all questions.  You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages.  Do
The Earth’s atmosphere contains a mixture of gases. Complete the table which shows some of these gases. Gas Formula CH4 Ammonia Steam Carbon dioxide (2 marks) 5 (b) 5 (b) (i) There is very little steam in the Earth’s atmosphere now because the steam cooled down and became liquid water. Suggest where most of the water went. ............................................................................................................................................ ............................................................................................................................................ (1 mark) 5 (b) (ii) Oxygen can be made by breaking up water molecules. Complete the chemical equation for this process. 2H2O Water  ................... Oxygen + 2 ................... Hydrogen (2 marks) NH3 H
Film badges contain two photographic films. One film is under a thin sheet of aluminium, and this only detects ........................................ radiation. The other film is under a thin sheet of plastic, and detects ........................................ and ........................................ radiation. ........................................ radiation cannot be detected by this type of badge. (4 marks) 6 (c) 6 (c) (i) Gamma radiation is used to sterilise plastic medical equipment. What does sterilise mean? ............................................................................................................................................ ............................................................................................................................................ (1 mark) 6 (c) (ii) Give one reason why gamma radiation can be used for sterilising plastic medical equipment. ............................................................................................................................................ ............................................................................................................................................ (1 mark) 6 (c) (iii) Give one reason why heat cannot be used to sterilise plastic medical equipment.