The Scientific Method :
The Scientific Method 4. Experiment – Test the hypothesis
Key principles of a good experiment
- One Variable at a time
What varies between the
test groups
- Control
A group under normal conditions for comparison
- Large Sample Size
The Scientific Method :
The Scientific Method 4. Experiment – Test the hypothesis
Types of experiments
Lab Experiment
Pro – all variables controlled
con – artificial conditions
Field Study – in nature
Pro – natural conditions
con – no control over variables
Field experiment – manipulation of
conditions in nature
The Scientific Method :
The Scientific Method 5. Collect Data
Written descriptions of results
Organize data in tables
Graph or chart data
Helps us visualize it
The Scientific Method :
The Scientific Method 6. Discuss conclusions
Does the data support the hypothesis?
Yes? – retest
No? retest, or form new hypothesis
Peer Review – Research published in scientific journals. Articles are reviewed by other scientists before allowed.