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Types of Science: Science: Study of:
Biology Living things and living processes
Ecology Living things and how they interact in their environment
Geology Earth and rock
Chemistry Atoms and molecules
What is Science???
Study of a topic that seeks to understand and explain the universe around us. Requires experimentation and evidence
Two major types: Pure: studying something just to learn
about it; basic research;
Applied: studying something to fix a problem; Medicine, technology
What do experiments need?
VariablesControlsData
Key Terms:
Control Group: group that you don’t experiment on; used for comparison
Variables: Factors important to your experiment
Types of variables:
Independent: anything that the researcher controls and designs as part of the set up. Experimental: specific variable you are
testing
Dependent: the data that you are collecting
Key Terms: Sample Size: number of subjects that you run your
experiment on
Sampling Error: error that arises from testing too few subjects (too low a sample size)
Example: How many students in WHRHS went to the beach this summer?
Which will give you better results: Three person survey? 500 person survey? Why?
You notice something (Observation)
It makes you wonder, why? Or How? (Ask a Question/State your Problem)
You think about it for a while. Based on the knowledge you have, you think you have an idea, but aren’t sure
(Form a Hypothesis)
You decide to test out your idea (Experiment)
Does it look like your hypothesis was right?
Support of Hypothesis
After many repetitions of the tests by you and other “observers”, all of which continue to support your
hypothesis,
Hypothesis becomes a Theory
You look at the results of your tests. (Data analysis)
Or do your results suggest something else?
Scientific Method
New Hypothesis
Is a Theory Fact?? No, it is the best explanation that we have for something based on current evidence.
Tomorrow could uncover new evidence that changes our theory!