Aim, Underlying chemistry and Experimental Approach ... · Aim, Underlying chemistry and Experimental Approach ... 3 Data collection ... experimental data. 1 National 5 Chemistry

Aim, Underlying chemistry and Experimental Approach

Candidate A

National 5 Chemistry Assignment 2017 Workshop 1 - evidence

SQA | www.understandingstandards.org.uk 1 of 19

Experimental method: I measured the pH of water before and after samples of different fertilisers

were added.

Marks Grid

Skills & KU Max mark

Mark awarded

Comments

1 Aim

An aim that describes clearly the purpose of the investigation.

1

2 Underlying

chemistry

An account of

chemistry relevant

to the aim of the

investigation.

3

1 A-type mark

3 Data collection

and handling

(a) A brief description

of the approach

used to collect

experimental data.

1



Candidate B



Marks Grid


Mark awarded

Comments

1 Aim

An aim that describes clearly the purpose of the investigation.

1

2 Underlying

chemistry

An account of

chemistry relevant

to the aim of the

investigation.

3

1 A-type mark

3 Data collection

and handling


of the approach

used to collect

experimental data.

1



Candidate C



Marks Grid


Mark awarded

Comments

1 Aim An aim that

describes clearly the purpose of the investigation.

1

2 Underlying

chemistry

An account of

chemistry relevant

to the aim of the

investigation.

3

1 A-type mark

3 Data collection

and handling


of the approach

used to collect

experimental data.

1



Candidate D



Marks Grid


Mark awarded

Comments

1 Aim An aim that


1

2 Underlying

chemistry

An account of

chemistry relevant

to the aim of the

investigation.

3

1 A-type mark

3 Data collection

and handling


of the approach

used to collect

experimental data.

1



Candidate E



Marks Grid


Mark awarded

Comments

1 Aim An aim that


1

2 Underlying

chemistry

An account of

chemistry relevant

to the aim of the

investigation.

3

1 A-type mark

3 Data collection

and handling


of the approach

used to collect

experimental data.

1



Data collection and handling and Graphical Presentation

Candidate A

I connected different pairs of metals were connected to see which produces the highest voltage when

connected in an electrochemical cell.



Marks Grid


Mark awarded

Comments

3 Data collection

and handling

(b) Sufficient raw data

from the

candidate’s

experiment.

1

(c) Data presented in a correctly produced table.

1

(d) Mean and/or

derived values

calculated

correctly.

1

A-type mark

4 Graphical

presentation

(a) An appropriate format from the options of scatter graph, line graph or bar graph.

1

(b) The axis/axes of the graph has/have suitable scale(s).

1

(c) The axes of the graph have suitable labels and units.

1

(d) Accurately plotted data points and, where appropriate, a line of best fit.

1

A-type mark



Candidate B

Marks Grid




Mark awarded

Comments

3 Data collection

and handling


from the

candidate’s

experiment.

1


1

(d) Mean and/or

derived values

calculated

correctly.

1

A-type mark

4 Graphical

presentation


1


1


1


1

A-type mark



Candidate C



Marks Grid


Mark awarded

Comments

3 Data collection

and handling


from the

candidate’s

experiment.

1


1

(d) Mean and/or

derived values

calculated

correctly.

1

A-type mark

4 Graphical

presentation


1


1


1


1

A-type mark



Candidate D

The candidate did not provide any details on the experimental approach.





Marks Grid


Mark awarded

Comments

3 Data collection

and handling


from the

candidate’s

experiment.

1


1

(d) Mean and/or

derived values

calculated

correctly.

1

A-type mark

4 Graphical

presentation

(a) An appropriate format from the options of scatter graph, line graph or bar graph..

1


1


1


1

A-type mark



Documents

Aim, Underlying chemistry and Experimental Approach ... · Aim, Underlying chemistry and Experimental Approach ... 3 Data collection ... experimental data. 1 National 5 Chemistry