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    Practice Exam Answer Schedule

    Uploaded by

    Siya Pathak
    This document contains the questions and marking schemes for a 10 question test. It includes multiple choice, short answer, and graph interpretation questions on topics like chemistry experiments, solar panels, chromatography, and energy production trends over time. The marking schemes provide details on the number of marks awarded for correct or partially correct responses.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Practice Exam Answer Schedule

    Uploaded by

    Siya Pathak
    10 views3 pages
    This document contains the questions and marking schemes for a 10 question test. It includes multiple choice, short answer, and graph interpretation questions on topics like chemistry experiments, solar panels, chromatography, and energy production trends over time. The marking schemes provide details on the number of marks awarded for correct or partially correct responses.

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    Practice exam answer schedule

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    This document contains the questions and marking schemes for a 10 question test. It includes multiple choice, short answer, and graph interpretation questions on topics like chemistry experiments, solar panels, chromatography, and energy production trends over time. The marking schemes provide details on the number of marks awarded for correct or partially correct responses.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    10 views3 pages

    Practice Exam Answer Schedule

    Uploaded by

    Siya Pathak
    This document contains the questions and marking schemes for a 10 question test. It includes multiple choice, short answer, and graph interpretation questions on topics like chemistry experiments, solar panels, chromatography, and energy production trends over time. The marking schemes provide details on the number of marks awarded for correct or partially correct responses.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 3

    Question 1

    a) 30 1 mark

    b) 45 mL drawn in cylinder B : good attempt at meniscus 0.5+0.5 mark

    Question 2
    a) Solar (cell, panel) 1 mark

    b) Passing cloud/ “Sun went in” 1 mark

    Question 3
    a) 84 1 mark

    b) B 1 mark

    c) C 1 mark

    d) Z : at any/all temperatures it has the slowest/longest time 0.5+0.5 mark

    e) D 1 mark

    Question 4
    a) Colour of light. Not just “the light” 1 mark

    b) Any 2 relevant variables eg amount of weed, water temperature, light intensity, amount of
    sodium (bi) carbonate. 1 mark each

    Question 5
    Any error e.g. y axis uneven, y axis upside down, no label for y axis, points no plotted with x’s, point
    plotted incorrectly, smooth line / curve best fit not drawn, poor use of available graph paper, graph
    had no title etc 5 errors = 3 marks

    3-4 errors = 2 marks

    1-2 errors = 1 marks

    Question 6
    a) Paint in insoluble in water 1 mark

    b) D : matches pattern of paint A on chromatogram 1 mark

    c) Any sensible answers e. g check and see paint from courier van matches pattern of spots
    1 mark
    Question 7
    a)

    b) B 1 mark

    c)

    d)

    Question 8
    a) B 1 mark

    b)

    c)

    Question 9

    a) Percentage electricity production by different sources 1 mark

    b) Starting at 70% in 1985 dropped to 56% in 2020. Accept full description of the trend with
    reference to similar value between 1985 to 1995, then dropped to 60% and stable until 2005, further
    drop to 55% from 2005 to 2015, then a slight increase. 3 marks

    Question 10
    a) gas 15-20% in 1990 to 18% in 2020
    oil 28% in 1990 to 38% in 2020
    hydro 40% in 1990 to 29% in 2020.
    Gas did not change between two periods. Oil increase by 10%, while hydro dropped by 15%.
    2 marks

    b) Oil in 1965 is 40% and 38% in 2019

    Hydro in 1965 is 35% and 25% in 2019

    Gas in 1965 is 0% and 19% in 2019

    Others in 1965 is 5% and 8% in 2019

    Coal in 1965 is 25% and 7% in 2019

    Wind in 1965 is 0% and 4% in 2019

    Solar/nuclear in 1965 is 0% and 0% in 2019 2 marks

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