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    Checkpoint Answers

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    Checkpoint Answers

    Uploaded by

    wpd
    840 views2 pages
    a1

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    a1

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    840 views2 pages

    Checkpoint Answers

    Uploaded by

    wpd
    a1

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    Aim

    The aim of the revision activity is to provide support for students who need to progress from
    developing to secure for the core National Curriculum statements.
    The aim of the extension activity is to provide extension for students who have already achieved
    secure. The activity is also suitable for older students in need of further extension work.

    Revision activity notes


    Students will produce a visual summary on reactions. They have been provided with a set of
    headings which they can cut out and stick onto A3 paper, between which they can make links.

    Additional notes:

    The revision activity should be appropriate for students achieving less than 59 % in the
    Checkpoint assessment.

    You can review students answers to questions in the Checkpoint assessment in Kerboodle. You
    may decide not to cover all tasks in the revision activity, based on students performance on
    specific questions.

    An index of which task covers which outcome is given in the Teacher Handbook.

    This revision activity could also be used as a revision sheet for all students.

    You could show students an example of how to construct a visual summary, perhaps by creating
    a visual summary together as a class on a familiar topic, for example, animated films.

    Ask students to first attempt the visual summary without the use of their books and textbooks.
    Once they have completed their visual summaries they should attempt the questions at the
    bottom of the sheet.

    If they find these difficult, this will suggest a gap in their learning and they should then use the
    student book to improve their visual summaries and re-attempt the questions.

    Students could be asked to explain the links and descriptions they make to ensure any
    misunderstandings are challenged.

    Revision activity answers


    1 colour change, fizzing, new substance appears
    2 magnesium + oxygen magnesium oxide
    Magnesium and oxygen are the reactants, magnesium oxide is the product.
    3 exothermic
    4 The substance is breaking down into smaller substances
    5 36.5 g

    Oxford University Press 2014 http://www.oxfordsecondary.co.uk/acknowledgements


    This resource sheet may have been changed from the original.
    Extension activity overview
    Students will produce a visual summary of topics relating to the reactions chapter. Students can set
    the visual summary up as they wish as different students will have formed unique links between
    topics. Students visual summaries should be reviewed, however, to ensure misunderstandings are
    discussed and corrected. Once the visual summaries are completed students should attempt the
    questions shown. If they encounter difficulties this will suggest that there is a gap in understanding
    and they should then revisit their visual summaries using the student book or class notes. They
    should then re-attempt the questions.

    Extension activity answers


    1 Any four from the following:
    temperature change, colour change, fizzing, mass change, appearance of odours, appearance of
    new substances, disappearance of reactants
    2 2HCl + CaCO3 CaCl2 + H2O + CO2
    3 Endothermic change in a reaction where energy is transferred from the surroundings
    Exothermic change in a reaction where energy is transferred to the surroundings
    4 X = H 2O
    Students will not need any understanding of the reaction here; they should have determined that
    4 hydrogen and 2 oxygen atoms were needed by counting how many were present on the
    product side. If students gave a formula that wasnt water but that contained the correct ratio of
    hydrogen to oxygen credit should be given for this.
    5 Decomposition reaction the reactant breaks down into smaller components.
    6 The iron nail has reacted with oxygen. The mass of oxygen has combined with the mass of the
    iron nail hence mass has increased overall.

    Oxford University Press 2014 http://www.oxfordsecondary.co.uk/acknowledgements


    This resource sheet may have been changed from the original.

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