1. You need:
Clean paper (2) / Pencil
Egg lab
Warm Up:
What is the function of the cell membrane?
I CAN: investigate the parts of the basic cell.
Oct.2, 2018

3. Egg Observations
When I say “egg” – what do you imagine in your head? Write that down.
Is this what you imagined…why or why not?
How do they compare/contrast?
Let’s talk about why…and hypothesize.
After they write observations/prior knowledge of “chicken egg” – I show the egg with no shell. They write observations again. I explain what I have done. They hypothesize about what happened and why. I am careful to talk about the calcium carbonate of the shell is similar to the calcium bones need. It is used for protection for the egg. Calcium carbonate happens to be a base – so it reacts and dissolves when add to an acid like vinegar. I intentionally made them react to dissolve the egg shell. Last question – if the shell is gone, why is it not a blob that slips through my fingers? How does it hold it’s shape? Students should eventually – through hypotheses and/or prior knowledge and experience – realize that the egg has a “thin skin” or membrane in addition to the shell. A membrane like a cell!

4. Observations of an egg
Observations of “de-shelled” egg

5. Check your chart 85.2g 81.9g 87.4g 86.6g 89.8g 88.7g 86.1g 85.6g 92.0g
Soaking liquid
Initial Mass
Hypothesis
Mass after soak
Net change
Observations
No liquid
water
Corn syrup
Paint
Food color
85.2g
81.9g
87.4g
86.6g
89.8g
88.7g
86.1g
85.6g
92.0g
87.0g

6. Check your chart 85.2g 81.9g 87.4g 86.6g 89.8g 88.7g 86.1g 85.6g 92.0g
Soaking liquid
Initial Mass
Hypothesis
Mass after soak
Net change
Observations
No liquid
water
Corn syrup
Paint
Food color
85.2g
81.9g
87.4g
86.6g
89.8g
88.7g
86.1g
85.6g
92.0g
87.0g

7. Check your chart Mass 85.2g 81.1g 81.9g 79.3g 87.4g 95.8g 86.6g 98.1g
Soaking liquid
Initial Mass
Hypothesis
Mass after soak
Net change
Observations
No liquid
water
Corn syrup
Paint
Food color
85.2g
Mass
81.1g
-___g
81.9g
79.3g
-___g
87.4g
95.8g
+___g
86.6g
98.1g
+___g
89.8g
62.5g
-___g
88.7g
67.2g
-___g
86.1g
94.4g
+___g
+___g
85.6g
95.9g
92.0g
104.0g
+___g
87.0g
95.3g
+___g

8. Mass:
Did it go up?
Did it go down?
Did it stay the same?

9. CELLS
Even if cells are very tiny, they are made up of smaller parts, and the parts do different jobs.
Cell membrane
Nucleus

10. Osmosis – “osmos” is Greek…to push
Movement of WATER through a semi-permeable membrane…for balance.
Diffusion – mvmt of particles

11. Homeostasis
Homeo…homoios, homo -Greek -means “like” or “same/similar” Stasis… -English -means a period of inactivity or balance

12. Cells Page 286 Skim through the reading.
Write a sentence (or two) explaining the difference between PROKARYOTIC and EUKARYOTIC

13. Today
Let’s practice our vocabulary with a card sort. Microscope parts/functions first.
Now try to sort the ORGANELLES – and their functions. Work with a partner.
Have you finished your cell coloring (for association)?

18. CELLS

19. Cell Membrane BOTH Plant and Animal Cells
Function: controls what substances enter and exit the cell
Analogy to City: City “Gate Keeper”

20. Cell Wall PLANT CELLS ONLY
Function: surrounds plants to protect and support the cell
Analogy to City: City Border

21. Nucleus BOTH Plant and Animal Cells
Function: directs all the cells activities (brain of cell)
Analogy to City: City Hall

22. Nucleolus BOTH Plant and Animal Cells
Function: makes ribosomes inside the nucleus
Analogy to City: Copy Machine Inside City Hall

23. Nuclear Membrane BOTH Plant and Animal Cells
Function: controls what enters and leaves the nucleus, protects
Analogy to City: gate around City Hall

24. Chromosomes BOTH Plant and Animal Cells
Function: contains the important blueprints of the cell or DNA
Analogy to City: City Mayor

25. Vacuole BOTH Plant and Animal Cells
Function: stores food, water, waste, and other materials
Analogy to City: Warehouses, Water Towers, etc.

26. Chloraplast PLANT CELLS ONLY
Function: captures energy from sunlight and produces food
Analogy to City: Solar Energy Plant

27. Endoplasmic Reticulum
BOTH Plant and Animal Cells
Function: built proteins and move them throughout cell or out of cell (Smooth – no ribosomes, Rough – ribosomes)
Analogy to City: City Transportation Department

28. Cytoplasm BOTH Plant and Animal Cells
Function: gel-like fluid between cell membrane and nucleus, allows other organelles to float freely through cell
Analogy to City: City Yards

29. Ribosomes BOTH Plant and Animal Cells Function: produce proteins
Analogy to City: Construction Company

30. Lysosomes ANIMAL CELLS ONLY
Function: contain chemicals that break down food particles and worn out cell parts
Analogy to City: Recycle or Waste Management Company

31. Mitochondria BOTH Plant and Animal Cells
Function: rod-shaped organelle that produce energy (powerhouse)
Analogy to City: Energy Plant

32. Golgi Body BOTH Plant and Animal Cells
Post Office
BOTH Plant and Animal Cells
Function: receives materials from the endoplasmic reticulum and sends them to other parts of the cell
Analogy to City: Post Office

33. The Whole City…
Post Office

34. 1. Choose the wrong statement from the following.
a) Mitochondria produces most of the energy for the cell.
b) Chloroplasts are “food producers.”
c) Cell wall controls the movements of materials into and out of the cell.
d) Nucleus regulates and controls all cell activities, acting as the “brain” of the cell.