science module exams 2013
DESCRIPTION
Science Module Exams 2013. Triples _____________ No exams until summer 2014. Controlled assessment 25% of award. Summer 2013. www.whitleybayscience.net. Username : parent.yr10 Password : science Username : firstname.lastname Password : science. Revision and Online Assessments. - PowerPoint PPT PresentationTRANSCRIPT
Core Science
Module 1 : 9th January
Module 2 : 17th January
Module 3 : 23rd May
Triples _____________
No exams until summer 2014
Controlled assessment25% of award
Summer 2013
www.whitleybayscience.net
Username : parent.yr10Password : science
Username : firstname.lastnamePassword : science
Revision and Online Assessments
Online assessments
Past papers
The Return of the Extended answer
18 marks out of 60 for each paper.
(3x 6 mark questions). 3 papers per qualification .
OXBOX
Module P2 Upgrade: Model answers 4
© Oxford University Press 2011
OzoneFoundation tier question
Click anywhere on this screen to proceed.Navigate using the links at the bottom of every screen.
© Oxford University Press 2011
Module P2 Upgrade: Model answers 4
QuestionExplanation of question
Answer
Question The Sun gives off radiation which then reaches the Earth. Some of this radiation is very dangerous to living organisms, including humans, but a chemical found high in the atmosphere protects us from it
Explain why this radiation is dangerous and describe the process by which the chemical in the atmosphere protects us. Make sure that you use correct scientific terms in your answer.
[4]
© Oxford University Press 2011
Module P2 Upgrade: Model answers 4
QuestionExplanation of question
Answer
Explanation of questionThis is a free response question worth four marks. You need to recall and explain that ultraviolet radiation from the Sun is absorbed by ozone in the atmosphere, and that ultraviolet is ionising and causes damage to living cells. There are four marks available which suggests that you should make four distinct points.
© Oxford University Press 2011
Module P2 Upgrade: Model answers 4
QuestionExplanation of question
Answer
G–E answerThe light from the sun includes dangerous radiation, and it is absorbed by the greenhouse gases.
commentThis candidate is confused between greenhouse effect and the ozone layer. However, one mark is awarded here for the word ‘absorbs’, even though ozone is not mentioned. Ozone is, in fact, a greenhouse gas, but does not contribute significantly to greenhouse effect.
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© Oxford University Press 2011
Module P2 Upgrade: Model answers 4
QuestionExplanation of question
Answer
D–C answerUltra violet from the Sun is dangerous, because it can give you skin cancer. It does this by ionising DNA in your skin cells. It is blocked by the ozone like this:
commentThis candidate gets marks for using the terms ‘ultraviolet’ and ‘ozone’. Another mark is awarded for stating that ozone ‘blocks’ radiation, although it is much better to use the word ‘absorbs’. This idea is backed up by the diagram. The candidate gains a fourth mark for stating that radiation damages living cells and is ionising.
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© Oxford University Press 2011
Module P2 Upgrade: Model answers 4
QuestionExplanation of question
Answer
D–C answer (continued) commentThe candidate has gained full marks, even though ‘ionising DNA’ is a mixture of two ideas rather than a coherent explanation.
The diagram alone would have been enough to gain the ozone and ultraviolet marks.
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Module P2 Upgrade: Model answers 5
© Oxford University Press 2011
Global warmingHigher tier question
Click anywhere on this screen to proceed.Navigate using the links at the bottom of every screen.
© Oxford University Press 2011
Module P2 Upgrade: Model answers 5
QuestionExplanation of question
Answer
Question (part 1)The graph shows how the average temperature of the Earth’s surface has changed over the past 150 years. The data is the temperature difference from the mean value of temperature during between the years 1850 and 1900. This value is referred to as the ‘previous mean’.
© Oxford University Press 2011
Module P2 Upgrade: Model answers 5
QuestionExplanation of question
Answer
Question (part 2)
© Oxford University Press 2011
Module P2 Upgrade: Model answers 5
QuestionExplanation of question
Answer
Explanation of question (part 1)This question is linked to what you know about the warming of the earth. However, it is mainly testing your ability to analyse evidence and interpret information from graphs. The first step is to read the ‘stem’ (the instructions above the graph) and to look carefully at what the graph axes are telling you.
In (a) the information from the graph must be interpreted and communicated. There are three marking points. To get two marks, all three must be present. Two must be present for one mark.
© Oxford University Press 2011
Module P2 Upgrade: Model answers 5
QuestionExplanation of question
Answer
D–C answer(a) Between 1850 and about 1923 it
went up and down, but from 1923 on it started to go up, but not at a steady rate, and it even went down between 1940 and 1950, and down a bit about 1970 too, but after that it went up and up.
commentThis response is worth two marks. The candidate has concentrated on describing in detail but the ‘big picture’ is also clear. The idea of fluctuation is conveyed in the phrase ‘went up and down’. The phrase ‘from 1923 on it started to go up’ covers both that the graph is initially constant and the rising trend more recently.
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© Oxford University Press 2011
Module P2 Upgrade: Model answers 5
QuestionExplanation of question
Answer
B–A* answer(a) The graph has a lot of random
variation, but it didn’t show any real trend until after 1970, when it has been going up all the time.
commentThis response is worth two marks. The candidate conveys the idea of fluctuation without any trend in the first sentence. The increase is described in the second sentence.
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