1. CELL THEORY 1

2. Bell Ringer 5 MINUTES Write today’s learning target
Answer the following question:
Which statement is supported by the information in the graph?
A. The enzymes respond in similar ways to changes in temperature
B. The enzymes in bacteria function best at 40°C
C. The enzymes function best at the same temperature
D. The enzymes break down the same substances 3

3. Agenda Bell Ringer (5 minutes) Introduction (10 minutes)
Notebook Input (10 minutes)
Partner Work/Independent Practice (50 minutes)
Exit Quiz (10 minutes) 4

4. Intro: Growing a new Heart from Stem Cells
But where do the cells come from that make this heart? 6

5. Levels of Organization11

6. It would take as many as 50 cells to cover the area of a dot on the letter “i”

7. Cool Cell Facts 11

8. What will we cover today?
1. Scientific laws vs. theories
2. Old cell theory (spontaneous generation)
3. Discoveries on the path to current cell theory
4. Three parts of current cell theory
Title of your notes: Cell Theory 11

9. Today, write what is Bold and underlined11

10. Laws are verified statements/descriptions about nature
Law vs. Theory
Laws are verified statements/descriptions about nature
An example of a scientific law is the law of gravity
Theories are explanations of phenomena (things you observe); can change or be disproven
An example of a scientific theory is the theory of evolution 11

11. A long time ago… B. Spontaneous Generation
People, including scientists, used to think that living things could form randomly from nothing
This theory was proven false by several scientists 11

12. So how did we figure out that life comes from cells?
C. Timeline of Discoveries 11

13. Our Current Cell Theory
D. 3 Parts of Cell Theory
1. Cells are the basic unit of life 11

14. Our Current Cell Theory
2. All living things are made of cells
Multicellular (multi - many)
Unicellular (uni - one)
HINT: IF IT HAS A CELL/CELLS, IT IS A LIVING THING. 11

15. Our Current Cell Theory
3. All cells come from pre-existing cells 11

16. Check For Understanding
First we learned about laws vs. theories
What is a law?
What is a theory? 11

17. Check For Understanding
Next we learned what people used to think about how life started.
What did people used to think?
What was the old theory called? 11

18. Check For Understanding
Then we learned discoveries on the path to our current cell theory.
What scientific tool was invented that played a role?
Why are they called cells? 11

19. Check For Understanding
Finally we learned the three parts of the cell theory.
What are the three parts? 11

20. Partner Work/ Independent Practice
Half of you will be working in partners at the microscopes
The other half will be working independently
We will switch after 25 minutes 11

21. Partner Work Instructions
Talk quietly with YOUR PARTNER ONLY
Stay with your partner at all times, no walking around the room
Rotate quickly to the next station when you hear the timer
If you are not doing work, you will sit down and receive a zero 11

22. Independent Work Instructions
Work silently
Stay in your seat
Raise your hand for help
Work with urgency 11

23. Notebook Output
You are a scientist and have found a microscopic object. You think that this object could be a new life form that has never been discovered.
Here are the microscopic object’s characteristics: contains DNA and protein, comes from pre-existing microscopic objects, does not contain cells.
Using the cell theory, determine if this microscopic object is a living thing. Explain why it is alive or not in 3 sentences or more. 11

24. Exit Quiz
Work silently and independently! 11

25. Home Learning
Study the following vocabulary words for bio blitz quiz next class:
Autotroph
Heterotroph
Producer
Kingdom
Consumer
Domain
Protist
Eubacteria
Archaebacteria
Fungi
Plant
Animal 22