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The Scientific Method
15

The Scientific Method. A. Observe B. Question C. Research.

Dec 14, 2015

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Baldwin May
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Page 1: The Scientific Method. A. Observe B. Question C. Research.

The Scientific Method

Page 2: The Scientific Method. A. Observe B. Question C. Research.

A.ObserveB.QuestionC.Research

Page 3: The Scientific Method. A. Observe B. Question C. Research.

D. Hypothesize! (educated guess)

E. ExperimentF. Data

Page 4: The Scientific Method. A. Observe B. Question C. Research.

G. AnalyzeH. Conclude

Page 5: The Scientific Method. A. Observe B. Question C. Research.

Hypothesis vs. Theory

Hypothesis-1 explanation

Theory-◦many hypotheses proven over time!

◦fact/truth

Page 6: The Scientific Method. A. Observe B. Question C. Research.

The Skinny On the Sci Method

Fall 2013

Page 7: The Scientific Method. A. Observe B. Question C. Research.

Control Group vs. Experimental Group

Control group: group that is left alone

no variable is introduced to it! used for COMPARISON

Experimental group:group that is changedvariable introduced

Page 8: The Scientific Method. A. Observe B. Question C. Research.

Skinny on VariablesIndependent Variable

The factor that was changed

Dependent Variable:The result of the change

Page 9: The Scientific Method. A. Observe B. Question C. Research.

ScenarioMelly Sue has always wondered if her goldfish could withstand slightly colder water. She decides to perform a scientific experiment! After having done some research on goldfishes, she thinks that colder water will cause her fish’s heart rate to increase.

Page 10: The Scientific Method. A. Observe B. Question C. Research.

Problem:Will changing temperature affect goldfish

heart rate? Hypothesis:If temperature of environment decreases, then heart rate will increase.

Page 11: The Scientific Method. A. Observe B. Question C. Research.

750 F

550 F600 F

650 F700 F

1

4

32

5

CONTRO

LExper imenta l

Exper imenta l

Exper imenta l

Exper imenta l

Billy notices that the fish’s heart rate

decreased in the colder water,

because their gills opened and closed

slower.

Page 12: The Scientific Method. A. Observe B. Question C. Research.

RULESEvery variable is kept the same, except for

the independent variableEx: same fish bowl

same water same fish food same exposure to light same environmental stress

Unavoidable Source of Experimental Error: the fish themselves

Page 13: The Scientific Method. A. Observe B. Question C. Research.

Independent Variable:The decreasing temperature of the water.

Dependent Variable: Decreasing heart rate

Data:

Temperature (F) Heart Rate (BPM)

75 30

70 28

65 25

60 20

55 18

Page 14: The Scientific Method. A. Observe B. Question C. Research.

Results

70 65 60 5515

20

25

30

Temperature (F)

Hea

rt R

ate

(bpm

)

Page 15: The Scientific Method. A. Observe B. Question C. Research.

Conclusion: -Restate the problem. -Was the hypothesis correct? -Use data to support hypothesis.

The experiment used the scientific _______ to test how ____ _____of fish would be affected by decreasing_______. The hypothesis was ______ correct, because decreasing temperature caused a ________ heart rate in the fish. The data collected showed that at 70 F, the heart rate was _______. At 60 F, the heart rate was _________. The results concluded that there was a ________ trend of heart rate with decreasing ________.