1. Section 1 Scientific Methods
Chapter 2
Section 1
Scientific Methods

2. Objectives List and describe the steps of the experimental method.
Describe why a good hypothesis is not simply a guess.
Describe the two essential parts of a good experiment.
Describe how scientists study subjects in which experiments are not possible.
Explain the importance of curiosity and imagination in science.

3. Scientific Method
Form a Prediction- statements made in advance that express the results that will be obtained from testing a hypothesis
A prediction is used to test a hypothesis
Form a Hypothesis- theory or explanation based on observations and that can be tested

4. Scientific Method
Experiments are procedures that are carried out under controlled conditions to discover, demonstrate, or test something
An experiment is performed when questions that arise from observations cannot be answered with additional observations

5. Scientific Method
Good experiments have two essential characteristics: variable and control
The variable is the factor that changes in an experiment in order to test a hypothesis
The control always remains constant

6. Scientific Method
Experimental Group- group in the experiment that is identical to the control group except for one factor and is compared with controls group (changes)
Control Group- is the group in the experiment that serves as a standards of comparison with another group to which the control group (no change)

7. Scientific Method
Data - any piece of information acquired through observation or experimentation
Organizing data into tables and graphic illustrations
Graphs are often used by scientists to display relationships or trends in the data

8. Analyzing Data
Bar graphs are useful for comparing the data for several things in one graph.

9. Analyzing Data
Graphing the information makes the trends presented in tables easier to see.

10. Scientific Method Draw a conclusion
Scientists determine the results of their experiment by analyzing their data and comparing the outcome of their experiments with their prediction

11. Scientific Method Scientists often repeat experiments
Why would they want to do this?

12. Scientific Method Communicating Results
Scientists publish their results, sometimes in scientific articles, to share what they have learned with other scientists

13. Correlation Method
Used when the use of experiments to answer questions is impossible or unethical
Correlation - linear dependence between two variables
Example: looking at widths of rings on tree trunks to determine rainfall amounts
Trees produce wide rings in rainy years and narrow rings in dry years

14. Correlation Method

15. Scientific Habits of Mind
Curiosity
Skepticism
Open to new ideas
Intellectual honesty- admit hypothesis was wrong
Imagination & Creativity

16. REVIEW!!! Describe why a good hypothesis is not simply a guess.
Describe how scientists study subjects in which experiments are not possible.
Explain the importance of curiosity and imagination in science.