Scientific method

Scientific MethodScientific Method

Scientific MethodScientific Method

Scientific Method-Scientific Method- an approach to a an approach to a scientific problem.scientific problem.

Steps of Scientific MethodSteps of Scientific Method

1.1. InvestigateInvestigate- a - a person ask a person ask a question about a question about a particular particular phenomenon.phenomenon.

2. Research-2. Research- search for search for information about the information about the topic. topic.

By researching, a scientist By researching, a scientist can see what experiments can see what experiments have been done so they have been done so they don’t duplicate the same don’t duplicate the same experiment.experiment.

3. Hypothesis-3. Hypothesis- an an educated guess.educated guess.

4. Experimentation-4. Experimentation- series of tests to see if series of tests to see if the hypothesis is the hypothesis is correct.correct.

In an experiment, In an experiment, there is a control and there is a control and a variable. a variable.

ControlControl- a factor that - a factor that is not changed.is not changed.

VariableVariable- a factor - a factor that is changed.that is changed.

VariablesVariables

There are 2 types of There are 2 types of variables.variables.

1. Independent1. Independent- a - a variable you control. variable you control.

22. . DependentDependent- a - a variable you can’t variable you can’t control.control.

For ExampleFor ExampleThe amount of water I The amount of water I put on a plant would be put on a plant would be my independent my independent variable.variable.

The amount of growth The amount of growth the plant has would be the plant has would be the dependent variable.the dependent variable.

Your turnYour turn

The temperature I put a The temperature I put a plant in is the _______ plant in is the _______ variable.variable.

The color the plant turns The color the plant turns is the ______ variable.is the ______ variable.

5. 5. Data-Data- the collection the collection and analysis of the and analysis of the information gathered information gathered from the experiment.from the experiment.

2 Types of Data2 Types of Dataa. Numbersa. Numbers

b. Wordsb. Words

1. 1. NumbersNumbers- to put in - to put in graphs/charts.graphs/charts.

X-axis will contain X-axis will contain independent variablesindependent variables

Y-axis will contain Y-axis will contain dependent variablesdependent variables

2. 2. WordsWords- a - a description of the description of the experimentexperiment

-For example: color, -For example: color, texture or shape of a texture or shape of a leaf.leaf.

TheoryTheory

TheoryTheory- an - an explanation about the explanation about the topic supported by topic supported by the results of the the results of the experiment.experiment.

SharingSharing

SharingSharing- sharing the - sharing the experiment and the experiment and the results to others.results to others.

Ex: Medical journals, Ex: Medical journals, science journals, and science journals, and lab write-upslab write-ups

Scientific LawScientific Law

Scientific Law-Scientific Law- a a statement that is statement that is always true.always true.

Scientific Laws are Scientific Laws are usually backed using usually backed using math.math.

A theory can become A theory can become a scientific law.a scientific law.

A scientific law can A scientific law can also become a theory.also become a theory.

HypothesisHypothesis→ Theory↔ Scientific → Theory↔ Scientific LawLaw