practical investigation

Question 1

Valid data

Answer 1

1 independent, 1 Dependant and all others controlled variables

Question 2

Accuracy

Answer 2

How close it is to the value your aiming for
E.g you want 3, but you get 3.1, 2.97, 3.15
- Results are still accurate

Question 3

Precise

Answer 3

Consitancy
Low degree of uncertainty

Question 4

Experimental Precision

Answer 4

Repeating the measurement (average)
Collecting answers from others (increase amount of results)
Practicing (Knowing how to do it properly)

Question 5

Imprecise

Answer 5

High degree of uncertainty

Question 6

Extrapolate

Answer 6

Able to predict outcomes
- Continues trendline

Question 7

Interpolate

Answer 7

Predicting values between two points/values on a graph

Question 8

Absolute uncertainty

Answer 8

uncertainty of a measurement
- Expressed in relevant units
Eg L= 60 +/- 3
Absolute uncertainty= 3

Question 9

Percentage uncertainty

Answer 9

Absolute uncertainty in percentage
- Divided by measurement> multiplied by 100

Question 10

Random error

Answer 10

Occurs due to chance
Affects precision bc one measurement may have a random error

Question 11

Systematic error

Answer 11

Occurs due to materials and way experiment was completed
Affects accuracy because a measurement can be slightly off and record incorrectly