1. TEK 8.2
Scientific processes The student uses scientific inquiry methods during field and laboratory investigations.

2. Student Expectations
Plan and implement investigative procedures including asking questions, formulating testable hypotheses, and selecting and using equipment and technology
Collect data by observing and measuring
Organize, analyze, evaluate, make inferences, and predict trends from direct and indirect evidence
Communicate valid conclusions
Construct graphs, tables, maps, and charts using tools including computers to organize, examine, and evaluate data

3. Scientific Method Used in any science experiment or project.
A series of planned steps used to answer questions and to solve problems
Used in any science experiment or project.
Used everyday since you were born.

4. 8 Steps of the Scientific Method
Question
Observation
Inference
Hypothesis
Experiment
Results
Analysis
Conclusion
Queens
Offer
Indians
Help
Eating
Raspberries
And
Cherries

5. Scientific Method
Question Observation Inference Hypothesis Experiment Results Analysis Conclusion
What do you want to know? Use 5 senses (6 senses for girls) Prior knowledge If/then/because statement Test/Procedures Data Organize data (graph) What did you find out?

6. Question
Do different concentrations of H2O2 (Hydrogen Peroxide) affect the chemical reaction with yeast?

7. Materials
I packet of Yeast
3% H2O2 (Hydrogen Peroxide)
30% H2O2 (Hydrogen Peroxide)
Liquid Dish Soap
Food Coloring
Erlenmeyer Flask

8. Observation…
H2O2 is toxic
H2O2 is a colorless liquid
Dish soap is liquid and creates bubbles
Inference…. H2O2 will create a chemical reaction when in contact with other chemicals 30% H2O2 is a stronger solution than 3%

9. Hypothesis
If 30% H2O2 (Hydrogen Peroxide) is mixed with yeast then it will create a greater reaction because it has a stronger/higher concentration.

10. Experiment
Control -A standard for comparison in an experiment. -all the components that are kept the same.
Variable
A changeable factor in a controlled investigation.
-Only one variable should be tested at a time during an experiment!

11. 2 Types of Variables Independent Variables -the variable we change
2. Dependent Variables -the thing being measured

12. Identify Variables
Independent: What are we changing/testing? The different concentrations of H2O2
Dependent: what are we measuring? The size/rate of the chemical reaction

13. 3. The brand of the yeast/H2O2
Controls for Experiment The things that MUST remain the same for your experiment to be valid
1. The amount of liquids
2. The container used
3. The brand of the yeast/H2O2
4.environment/temperature/time and date

14. Experiment/Procedures

15. Time to go blow stuff up!!..... Because it’s Science!

16. Results
H2O2 Type
Time
30% 3%

17. Making Graphs
-Use a straight edge -Title the Graph -Include values of pie slices or bars -Color -Label your axis.

18. DRY/MIX D
ependent R
esults Y
-axis M I X
odify
ndependent
-axis

19. Analysis/Graph

20. Conclusion- Paragraph Form 3rd person
What does the data tell us (Results)? Was the hypothesis correct? Were any mistakes made? How could we change the experiment in the future? How can we apply this to real life?

21. Introduction Checklist
Written in paragraph form
3rd Person (The student…NO I, my, our, we, etc.)
Question
Research
Inferences
Hypothesis
Independent Variable
Dependent Variable

22. Study your notes! Quiz Today! Yaaaayyyyy!
NO Bell Ringer Today!!
Study your notes! Quiz Today! Yaaaayyyyy!