# THE SCIENTIFIC METHOD - PowerPoint PPT Presentation

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THE SCIENTIFIC METHOD. AND Parts of the experiment. Scientific Method. Series of steps used to solve a problem 1. State the Problem -- use your ________to make observations -- What ___ ____ ____ to find out? 2. Form a Hypothesis

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THE SCIENTIFIC METHOD

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## THE SCIENTIFIC METHOD

AND Parts of the experiment

### Scientific Method

Series of steps used to solve a problem

1. State the Problem

-- use your ________to make observations

-- What ___ ____ ____ to find out?

2. Form a Hypothesis

-- A ________ ___________based on prior knowledge/observations

-- What ____________ do you want to test?

3. Conduct an Experiment

-- __________ ___________for testing a hypothesis

-- What should you measure?

### Scientific Method (continued…)

4. Analyze the Data

-- _______________________________________

-- What __________ during the experiment?

5. Form a Conclusion

-- A ________ __________regarding the trend of the results

### Parts of an Experiment

• Control

• __________________________________

• Constant

• _______ or __________ that does not change

• Independent Variable

• Factor ___________ by the _____________

• The one thing __________

• Dependent Variable

• Factor ________ ________ depends on the ______________ variable

• The things being measured

### Practice Scenario

To determine the effect of ammonium sulfate on plant growth, two seed flats containing soil from a lawn were seeded using standard lawn grass mixture. One flat was watered with rainwater and the other with rainwater containing a little ammonium sulfate. The flats were kept in the same area to ensure identical conditions and temperature.

DEPENDENT VARIABLE

INDEPENDENT VARIABLE

CONSTANT

CONTROL

### Another Practice Scenario

Susie wants to see if a new, more costly fish food will cause fish to grow faster. She separates the fish into two groups of three fish each. Group One receives the old fish food. Group Two receives the new fish food. The lengths of the fish are measured each week.

DEPENDENT VARIABLE

INDEPENDENT VARIABLE

CONSTANT

CONTROL