Scientific Method Flashcards
(21 cards)
Explain The term “scientific method”
Organized approach to solving problems
What is a hypothesis
An educated guess based on observations
What is a theory?
A hypothesis becomes a theory after a set of experiments.
How do scientists investigate questions?
Experiments
Why do scientists carry out experiments?
To test their hypothesis
Steps of scientific method
- Plan and design
- Safe and ethical
- Include control
- Free from bias
Stages of scientific method
Question
|
Observation
|
Hypothesis —Change
| |
Result |
/ \ |
Hypothesis False Hypothesis
\ /
Theory
What is the need for a control
For comparison purposes
Why should you use a large sample size ?
Individual differences don’t influence the outcome (random)
What is double blind testing?
Where the experimental group and the control group are unaware of investigation and each other
Why are people selected at random?
Ensures all samples are tested
Why is one factor changed at a time?
So the outcome of the experiment isn’t Changed
What is a hypothesis?
An organized approach to solving problems
What is the purpose if a hypothesis
To test your observation
What is an experiment
Steps carried out to test hypothesis
What is the repeating of a experiment called
Replicating experiment
What is the pill with no active ingredient
Placebo
How would you keep the ph constant?
Use same ph buffer solution
How would vary the temperature in an experiment
Use a thermostatically controlled water bath set at different temperatures
Limitations of scientific method
The world around us is changing, human error
What is a law
A theory that has withstood the test of time
