The manipulation of variables
isolating a variable to investigate, and controlling the rest
Small invertebrates
slaters, snails, brine shrimps etc
Gather both qualitative & quantitative data (descriptive & numerical) to
→ Know how to care for it→ Determine the appropriate range for IV*→ Correctly control other variables not under investigation
Pros of using microorganisms for your study
Allows investigations to carried out easily and quickly in a test tube, petri dish, or under a microscope
Pros of using plants for your study
Easy to care for and grow; seeds = easy to access and cheap
Cons of using microorganisms
Very strict guidelines for what can be used
Cons for using plants
Can be time consuming to keep
Pros of using small invertebrates
Easy to find and look after; can give very rapid responses
Why should you research about your organism(s)’s habitat or ecological niche?
To ensure it is looked after correctly and the behaviour exhibited is due to the investigation, not physiological stress
independent variable
variable that is changed
dependent variable
variable that is measuresd
controlled variable
variable that remains constant throughout the whole study
The rule of thumb for a good method
simple and precise
Raw data should be put in the ________
appendix
These data representations show continuous data
Line graphs and histograms
Every graph must have
Title, labels, units
True or False: Your conclusion should restate the results and discuss the biological concepts relevant
False
Other studies should be used to ________
Support your findings
manipulation of variables
The ________- isolating a variable to investigate, and controlling the rest.