BTEC Level 3 Extended Diploma in Applied Science
Unit 4: Scientific Practical Techniques
4.3 Instruments and Sensors
Scenario:
As a scientist working as part of a team investigating ancient artefact, you are to analyse a sample
of brass which is about 150 years old and you are asked to quantitatively analyse it. You will be
using the techniques of colorimetry and titration, to find the percentage of copper present. Your
results will be compared to each other, to decide which a more accurate technique is, as well as to
compare the composition of modern brass. You are also required to show your competency in the
use of the instruments and sensor to your project manager.
Grading Criteria to be assessed:
P4 Use the instrument/sensors to test substances or materials.
M3 Justify the choice of instruments in the practical exercises.
D3 Evaluate the accuracy of the measurements taken.
Tasks:
1. For both of the practical activities, evaluate the accuracy of the procedures used and
compare them with each other. (D3)
Plagiarised work will result in disciplinary procedures.
Additional guidance:
Task: (D3)
Unit 4: Scientific Practical Techniques
4.3 Instruments and Sensors
Scenario:
As a scientist working as part of a team investigating ancient artefact, you are to analyse a sample
of brass which is about 150 years old and you are asked to quantitatively analyse it. You will be
using the techniques of colorimetry and titration, to find the percentage of copper present. Your
results will be compared to each other, to decide which a more accurate technique is, as well as to
compare the composition of modern brass. You are also required to show your competency in the
use of the instruments and sensor to your project manager.
Grading Criteria to be assessed:
P4 Use the instrument/sensors to test substances or materials.
M3 Justify the choice of instruments in the practical exercises.
D3 Evaluate the accuracy of the measurements taken.
Tasks:
1. For both of the practical activities, evaluate the accuracy of the procedures used and
compare them with each other. (D3)
Plagiarised work will result in disciplinary procedures.
Additional guidance:
Task: (D3)
