Practical Skills Flashcards
(6 cards)
1
Q
What are validity problems with graph in evaluation questions? (2)
A
- Only one person not enough to claim (1)
- Not the whole time is being covered (1)
2
Q
How do you achieve free marks during investigation planning? (2)
A
- Refer to control variables and how (1)
- Repeat experiment for mean (1)
3
Q
Why does mean improve investigation? (2)
A
- Can carry out statistical test (1)
- Improves repeatability (1)
4
Q
How would colorimeter improve result of colour tests? (1)
A
- No human error to colour identification (1)
5
Q
whats independent, dependent and control variable? (3)
A
- Independen = change (1)
- Dependent = observe (1)
- Control = same (1)
6
Q
What is uncertainty %? (1)
A
(Uncertainty/Measured Value)
x 100
