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Nature of Science Review

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by

Christine Edwards

on 7 October 2014

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Transcript of Nature of Science Review

Nature of Science Review
Theories - Laws
Theories and Laws are the result of
a large body of empirical evidence.

They are widely-accepted, based on evidence, found by the scientific method, testable, changeable and able to be replicated.
representation of a real phenomenon that is difficult to observe directly



Analyzing Data/
Graphing
Charts and graphs are used to analyze data (information).

Data is results of an experiment.
Evidence is proof/support of a hypothesis.
Scientific Method
PURPOSE/PROBLEM (WHY?)
RESEARCH (BACKGROUND INFO)
HYPOTHESIS (GUESS)
EXPERIMENT (TEST)
ANALYSIS (ANALYZE DATA)
CONCLUSION
Theories
Explain WHY something happens

Provides explanation

Lengthy (long) and detailed


Laws
WHAT happens

Often written as a mathematical equation

Short and concise
CONTROLLED
EXPERIMENT
(control group vs. experimental group)
FOR COMPARISON
Only ONE type of scientific study

Most valid type of study

change only one
independent variable
at a time to ensure validity

measures the effect on the
dependent variable

controlled variables
stay the same to keep fair/valid
EXAMPLES

Big Bang Theory
Cell Theory
Atomic Theory
Based on observations
Based on facts
EXAMPLES

Law of Motion
Law of Gravity
Models
EXAMPLES

DNA Model
Cell Model
Atomic Model
Earth Model
REPETITION
REPLICATION
multiple trials in an experiment
duplicate experiment by another person
Always discuss possible sources of error.

Follow procedures and use correct materials.

Test 1 independent variable at a time.

Use of control group to compare without I.V.

Accurate measurements and calculations

Eliminate bias (favoritism/prejudice)


Are the results valid?
Full transcript