Science - General Skills (Bonus)

Question 1

Independent variable

Answer 1

The variable being changed (eg. the antimicrobial used)

Question 2

Dependent variable

Answer 2

The variable being measured or observed (eg. the size of the zone of exclusion)

Question 3

Controlled variable

Answer 3

The variable(s) deliberately kept the same (eg. the incubating conditions of the agar plates)

Question 4

A control

Answer 4

An experimental setup with an unchanged independent variable. (eg. The disk in the middle with no antimicrobial agent)

Question 5

Key elements of a graph

Answer 5

• Title
• Independent variable
• Dependent variable
• Each data set in a different colour
• Legend that identifies the data sets
• Units

Question 6

x-axis

Answer 6

Independent variable

Question 7

y-axis

Answer 7

Dependent variable

Question 8

Gradient formula

Answer 8

Difference in y value / difference in x value = rise/run = y₂-y₁/x₂-x₁

Question 9

Key components when stating safety methods

Answer 9

• Risk

* Management

Question 10

Structure of stating a hypothesis

Answer 10

It is predicted that (prediction) because (reason). (It is predicted that hand sanitiser with higher concentrations of alcohol will kill more bacteria as bacteria because alcohol holds properties that are harmful to bacteria.)

Question 11

Structure of a conclusion

Answer 11

Aim (The aim was…)
Prediction/hypothesis (it was predicted that…)
Results (state the results)
ACCEPT or REJECT hypothesis (don’t say “proven” “correct” etc.)