1. Scientific method and experimentation quiz
Lutzkanin
September 2015

2. Place the following stages of a scientific method in order
Run experiments
Identify the problem
Make conclusions
Gather information
Make a hypothesis
Analyze the data
Answer
1. Identify the problem
2. Gather information
3. Make a hypothesis
4. Run experiments
5. Analyze the data
6. Gather conclusions

3. A statement about what is happens in nature that is true all the time.
Answer: Scientific Law

4. An aspect of an experiment that can be changed
Answer: Variable

5. An inference about a future event based on current evidence or past experience.
Answer: Prediction

6. Answer: Scientific Theory
An explanation of things or events based on knowledge gained from many observations and investigations.
Answer: Scientific Theory

7. This occurs in an experiments when what the scientist expects changes of how the results are viewed
Answer: Bias

8. Write the 5 parts of a system then show using the 5 parts how an alarm clock is a system.
Goal – wake you up on time
Input – set the alarm time
Process – keeps the time
Output – alarm goes off
Feedback – n/a

9. Write the 5 parts of a system then show using the 5 parts how a Refrigerator is a system.
Goal – keep food cold
Input – put food in
Process – food, kept cold
Output – food is cold
Feedback – thermostat

10. In 1928, Sir Alexander Fleming was studying bacteria grown in culture dishes. He noticed a mold called penicillin was also growing in some of the dishes. A clear zone existed around the penicillin mold. All the bacteria that had grown in this clear zone had died. In the culture dishes without mold, no clear areas were present.
Fleming decided that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and then test it to see if it would kill bacteria. Fleming prepared two beakers of nutrient broth, with had everything that the mold needs to grow and reproduce. He put mold into one of the beakers of nutrient broth. He allowed the mold to grow, and then removed the mold from the nutrient broth, and then he added the broth to a dish of bacteria. Fleming added the nutrient broth that had not had mold growing in it to another dish of bacteria. The bacteria in the dish with nutrient broth that had mold in it were all killed. The bacteria in the dish with nutrient broth that did not have mold in it were not killed. Fleming concluded that the mold produced a bacteria killing substance in the broth. He called the substance penicillin
1. Identify the problem Fleming wanted to solve.
2. What was Fleming’s hypothesis?
3. What was the variable of the experiment?
4. What was the control?
5. What was Fleming’s conclusion?
6. What was the great discovery from Fleming’s experiment?

11. 1. Identify the problem Fleming wanted to solve.
Was the mold killing the bacteria
2. What was Fleming’s hypothesis?
The penicillin mold killed the bacteria
3. What was the variable of the experiment?
mold
4. What was the control?
Dish of bacteria with nutrient broth
5. What was Fleming’s conclusion?
The mold produced a bacteria-killing substance
6. What was the great discovery from Fleming’s experiment?
penicillin