1.
State what is meant by a hypothesis.
[1 mark]
- a testable statement
JD SCIENCE
Designing and executing scientific tasks
Indicative marking points. Award marks for equivalent scientific or mathematical wording. Do not issue this sheet with the student worksheet.
2.
State what is meant by variables.
[1 mark]
- independent, dependent, control
3.
State what is meant by a risk assessment.
[1 mark]
- hazards, who is harmed, controls, residual risk
4.
State what is meant by a sampling plan.
[1 mark]
- how many, from where, how stored
5.
State what is meant by a method selection.
[1 mark]
- fit for purpose, available kit, cost, time
6.
State what is meant by repeats and reproducibility.
[1 mark]
- same person vs different person/lab
7.
State what is meant by acceptance criteria.
[1 mark]
- the numbers that mean a pass
8.
State what is meant by a literature search.
[1 mark]
- keywords, databases, date limits
9.
State what is meant by a scientific report.
[1 mark]
- aim, method, results, discussion, conclusion
10.
State what is meant by review and improvement.
[1 mark]
- what limited the method
11.
Pat is asked about a hypothesis in a Pearson Laboratory Sciences paper.
(a) [2 marks]
- based on the literature
(b) [3 marks]
- Assignment 1
12.
Pat is asked about variables in a Pearson Laboratory Sciences paper.
(a) [2 marks]
- only change one IV
(b) [3 marks]
- record units
13.
Pat is asked about a risk assessment in a Pearson Laboratory Sciences paper.
(a) [2 marks]
- signed before starting
(b) [3 marks]
- dynamic if the method changes
14.
Pat is asked about a sampling plan in a Pearson Laboratory Sciences paper.
(a) [2 marks]
- must be representative
(b) [3 marks]
- include blanks
15.
Pat is asked about a method selection in a Pearson Laboratory Sciences paper.
(a) [2 marks]
- from SOPs or papers
(b) [3 marks]
- justify in the report
16.
Pat is asked about repeats and reproducibility in a Pearson Laboratory Sciences paper.
(a) [2 marks]
- needed for confidence
(b) [3 marks]
- state n
17.
Five repeats take 12 minutes each plus 20 minutes setup. Total time?
[3 marks]
- Final answer: 80 min
18.
A sample plan is every 15 min for 3 hours. How many samples?
[3 marks]
- Final answer: 13 including t=0, or 12 if not — state 12 intervals = 13 if start included
19.
n=6. How many degrees of freedom for a mean?
[3 marks]
- Final answer: 5
20.
A 2×3 factorial has how many combinations?
[3 marks]
- Final answer: 6
21.
Stock is enough for 8 runs. Runs already done: 3. Remaining?
[3 marks]
- Final answer: 5
22.
A report is 8 pages, 2 are appendix. Percentage appendix?
[3 marks]
- Final answer: 25%
23.
Pat carries out a T-Level occupational task on planning and reviewing laboratory investigations. This is a typical Pearson required-practical style question.
(a) [2 marks]
- Independent: the factor being investigated
- Dependent: the measured result or quality check
(b) [2 marks]
- follow the SOP and keep other variables constant
- so the test is fair / only one variable is changed
(c) [2 marks]
- not recording the batch/lot number or operator ID
24.
Pat carries out writing or following an SOP for planning and reviewing laboratory investigations. This is a typical Pearson required-practical style question.
(a) [2 marks]
- Independent: a step in the method
- Dependent: whether the acceptance criteria are met
(b) [2 marks]
- same calibrated instrument
- so the test is fair / only one variable is changed
(c) [2 marks]
- skipping a verification check
25.
Pat carries out a COSHH / risk-assessment review for planning and reviewing laboratory investigations. This is a typical Pearson required-practical style question.
(a) [2 marks]
- Independent: hazard
- Dependent: control measure effectiveness
(b) [2 marks]
- same PPE and waste route
- so the test is fair / only one variable is changed
(c) [2 marks]
- using expired reagents or the wrong waste stream
26.
Pat carries out data review in a LIMS or quality log for planning and reviewing laboratory investigations. This is a typical Pearson required-practical style question.
(a) [2 marks]
- Independent: sample ID
- Dependent: result vs specification
(b) [2 marks]
- same calculation method
- so the test is fair / only one variable is changed
(c) [2 marks]
- transcription error between the instrument and the LIMS
27.
Compare a hypothesis with a sampling plan.
[4 marks]
- a testable statement
- how many, from where, how stored
- state one workplace implication
28.
Compare variables with a method selection.
[4 marks]
- independent, dependent, control
- fit for purpose, available kit, cost, time
- state one workplace implication
29.
Compare a risk assessment with repeats and reproducibility.
[4 marks]
- hazards, who is harmed, controls, residual risk
- same person vs different person/lab
- state one workplace implication
30.
Compare a sampling plan with acceptance criteria.
[4 marks]
- how many, from where, how stored
- the numbers that mean a pass
- state one workplace implication
31.
Apply your knowledge of acceptance criteria to this situation: set before you see the data
[3 marks]
- set before you see the data
32.
Apply your knowledge of a literature search to this situation: evaluate bias
[3 marks]
- evaluate bias