Chemistry Module 3
Practice Test Mark Scheme
Higher
Question Expected answers Marks Additional guidance
1 a 1000 × 2 Award one mark for working. A correct
answer alone receives two marks.
= 33 333
b Both methods of mining are given with a sensible use and a reason 5/6 Marks awarded for this answer will be
that is related to the purity of the salt obtained. The answer shows determined by the standard of the scientific
almost faultless spelling, punctuation, and grammar. It is coherent and response as well as the quality of written
in an organised, logical sequence. It contains a range of specialist communication (QWC). There are no discrete
terms used accurately. marks for the assessment of written
communication, but QWC will be one of the
Answer gives both methods of mining and two uses but is not clear 3/4 criteria used to assign the answer to an
about the reason for this selection. There are some errors in spelling,
appropriate level.
punctuation, and grammar. The answer has some structure and
organisation. The use of specialist terms has been attempted, but not Examples of scientific points made in the
always accurately. response:
Only one type of mining or one use is given and the candidate seems Mining gives salt mixed with rock.
1/2
confused about reasons. The spelling, punctuation, and grammar are
This is used for treating roads in winter.
very weak. The answer is poorly organised with almost no specialist
terms and/or their use demonstrates a general lack of understanding Rock helps with grip on icy roads.
of their meaning.
0 Solution mining gives salt solution.
No relevant content.
Pure salt is used to make other
chemicals.
c Electrolysis 1
1
Twenty First Century Science Chemistry Module 3 Higher © Oxford University Press 2011 Page 1 of 2
Practice Test Mark Scheme
Higher
Question Expected answers Marks Additional guidance
1 a 1000 × 2 Award one mark for working. A correct
answer alone receives two marks.
= 33 333
b Both methods of mining are given with a sensible use and a reason 5/6 Marks awarded for this answer will be
that is related to the purity of the salt obtained. The answer shows determined by the standard of the scientific
almost faultless spelling, punctuation, and grammar. It is coherent and response as well as the quality of written
in an organised, logical sequence. It contains a range of specialist communication (QWC). There are no discrete
terms used accurately. marks for the assessment of written
communication, but QWC will be one of the
Answer gives both methods of mining and two uses but is not clear 3/4 criteria used to assign the answer to an
about the reason for this selection. There are some errors in spelling,
appropriate level.
punctuation, and grammar. The answer has some structure and
organisation. The use of specialist terms has been attempted, but not Examples of scientific points made in the
always accurately. response:
Only one type of mining or one use is given and the candidate seems Mining gives salt mixed with rock.
1/2
confused about reasons. The spelling, punctuation, and grammar are
This is used for treating roads in winter.
very weak. The answer is poorly organised with almost no specialist
terms and/or their use demonstrates a general lack of understanding Rock helps with grip on icy roads.
of their meaning.
0 Solution mining gives salt solution.
No relevant content.
Pure salt is used to make other
chemicals.
c Electrolysis 1
1
Twenty First Century Science Chemistry Module 3 Higher © Oxford University Press 2011 Page 1 of 2
