1. Lab Safety Cartoon Questions
List 3 unsafe activities shown in the illustration and explain why each is unsafe.
List 3 correct lab procedures depicted in the illustration.
What should Bob do after the accident?
What should Sue have done to avoid an accident?
Compare Luke and Duke's lab techniques. Who is following the rules?
What are three things shown in the lab that should not be there?
Compare Joe and Carl's lab techniques. Who is doing it the correct way?
What will happen to Ray and Tim when the teacher catches them?
List three items in the illustration that are there for the safety of the students in the lab.
What is Betty doing wrong?

2. WARM UP
You have accidentally broken a test tube and spilled a chemical on the table. What should you do?
2. True or False: You should wear safety goggles during every science block.

3. Scientific Method

4. OHEC
Observe
Hypothesize
Experiment
Conclude

5. Observation
A note made by studying something using sight, sound, touch, smell and taste
Will all popcorn kernels pop if bagged popcorn is stored in a cabinet or refrigerator?
Will warm water or cold water help a plant grow faster?
Does bar soap clean your hands better than sanitizing solution?
Will more ants eat butter or margarine?
Does salted water boil faster than unsalted water?

6. Inference
Inference is just a big word that means a conclusion or judgement. If you infer that something has happened, you do not see, hear, feel, smell, or taste the actual event. But from what you know, it makes sense to think that it has happened.

7. A scientific guess as to the outcome of an experiment
Hypothesis
A scientific guess as to the outcome of an experiment
If bagged popcorn is stored in a refrigerator then all the kernels will pop.
If a plant is given warm water then it will grow faster than a plant given cold water.
If you clean your hands with sanitizing solution then your hands will not be cleaner than if you used liquid soap.
If ants are fed butter then they will not eat margarine.
If salt is added to water then the water will not boil faster.

8. How to make a hypothesis
If _________________then ________________ independent variable dependent variable
The variable that changes as a result of the independent variable
What did they measure?
The variable that is changed by the experimenter
What’s different?

9. Experiment Steps used to conduct an investigation
One bagged popcorn of the same brand is placed in the refrigerator for 24 hours.
Two of the same type plant were watered.  One plant is given water at 75 degrees Celsius and one plant is given water at 15 degrees Celsius.
An individual has one hand cleaned with sanitizing solution and the other hand cleaned with liquid soap.  The sanitized hand is allowed to dry while the other hand is washed for twenty seconds and then rinsed.
To determine which lipid ants would eat, ants from the same colony were given ½ tablespoon of margarine and ½ tablespoon of butter. 

10. Experimental vs. Control
Experimental Group Control Group
All variables kept constant. Used for comparison during the experiment
Group subjected to the independent variable
Ex: Cold water for plant or warm water for plant
Ex: Room temperature water for plant

11. Statement that explains the results of the experiment
Conculsion
Statement that explains the results of the experiment
Popcorn stored in the refrigerator popped better than popcorn stored in the cabinet; was hypothesis proven or disproven.
*Plants given warm water grew better than plants given cold water; was hypothesis proven or disproven
*Hands cleaned with liquid soap have fewer germs than hands cleaned with sanitizing solution; was hypothesis proven or disproven
*More ants ate the butter than margarine; was hypothesis proven or disproven
*The salted water boiled faster than the unsalted water; was hypothesis proven or disproven

12. Try it!
In 1928, Sir Alexander Fleming was studying a bacteria growing in culture dishes. He notices a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because all the bacteria that had grown in this area had died.
Fleming hypothesized that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. After he grew the mold in a nutrient broth, he removed the mold and added the broth to a culture of bacteria. The bacteria died. This is how the antibiotic Penicillin was discovered.
What was the problem?
What was the hypothesis
What was the conclusion of the experiment.

13. Lab Tools Scalpel Forceps Beaker Hot plate Microscope Petri dish
Pipette
Test tube
Slide cover
Slide
Probe
Graduated cylinder
Goggles
Erlenmeyer flask
Test tube rack
Tongs