dr. biodiversity eye test. what did you see? scientific method method of problem solving...
Post on 29-Dec-2015
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Scientific Method
Method of problem solving
Observations Questions Hypotheses
OR
Questions Observations Hypotheses
OR
Questions Hypotheses Observations
Basic Steps to the Scientific Method
• 1. Make Observation or State a Problem/Question
• 2. Formulate a Hypothesis-
testable explanation for an observation
predict what will occur and why
• 3. Testing the hypothesis
- only further observations required
- experimentation is required
Controlled Experiment
• Isolates and tests the effects of a single factor or experimental variable
• Two identical groups:
1. Control group
2. Experimental group
• Has the scientific method changed over time?
PRE-LAB:Interpreting a Controlled
Experiment
• What is a seed?
• What do seeds need to germinate?
• Which factor is being investigated in this lab?
• Are there any other variables involved in the lab that could affect the outcome?
What kind of data is going to be collected from the Mustard Seed
Lab?
• Quantitative Data
• Descriptive Data
• How can quantitative data be illustrated?
4. Recording and Analyzing Data
• Display data in:
a. data table
b. line graph
c. bar graph
d. pie chart
Line Graph
• Shows relationship between two variables
• Allows you to estimate values
• X-axis: independent variable
• Y-axis: dependent variable
The Effect of Fertilizer on Plant Growth
0123456789
10
Week1
Week2
Week3
Week4
Time
Cen
tim
eter
s
Plant 1
Plant 2
Bar Graph
• Used to show comparisons
• X-axis either:
1. Scale
2. Labels
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10
Inches
Jan Feb March April
Month
Comparision of Rainfall Over Four Month Period
Rainfall
Pie Chart
• Topic represented by entire “pie”
• “slices” individual categories
Students Sport Preferences
30%
20%
40%
10%
BasketballSwimmingSoccerBaseball
Data Tables• Displays data• Title- should reflect
information in table
Setup Dish I Dish II
Control 0 21
Experimental 2 44
Number of seeds that germinated
General Graphing Procedures
• ALWAYS PENCIL
• Title and Key, if needed
• Correct scale
• Equal spacing between units
• Neat
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