Mystery Cells
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Mystery Cells
The situation• Use a cup to draw 3 circles on each page (2 pages) in your SN.
Day 1
The situation
• Police contacted the administration of Westwood Middle School early this morning. A dead body was found in the field behind our school. Investigators think it was murder and are asking for our cooperation to help solve the crime.
The situation
• “ We found no external marks on the body, suggesting no physical trauma. We did, however, recover some unique cells from inside the body that have been saved for analysis. Before we can determine what exactly they are, we need to decide whether or not they belong to a plant or animal species.”
Interview with the medical examiner
The situation
• In order for you to be of assistance to the police department, you need to learn more about cells, and the differences between them.
Research
You will look at ALL of the slides eventually,but only 6 today.
To learn more, you will use the classroom microscopes to view
slides of different cells.
Take your time to carefully draw what you see.
Today, you will look at each slide for 5 minutes.
1. Write down the number of the slide/microscope you are looking at.
2. Use the circles in your science notebook to draw what you see.
3. Make a prediction - Is it a plant OR animal cell? Write one!
When you get to a microscope…
Let me show you…
1. Number
2. Drawing
3. PredictionPlant or animal
Each circle should have 3 things…
3
Plant
• Monday, November 5
• Journal: What are some characteristics of the cells that you observed on Thursday?
• Schedule: Cell Lab day 2
• Homework: None
Day 2
• Please respond to the following using complete sentences:1. Do all cells look alike?2. Give some examples of how they are
different.3. Why might some cells be different from
others?
* Use page #40 In your ISN*
ReflectionLeft-hand page
The situation• Use a cup to draw 1 circle on each page (2 pages) in your SN.
• Label one “Plant” and the other “Animal”
Plant Animal
• You are an animal.
• An onion is a plant.
Prepare your own plant and animal slides using onion
cells and YOUR cells!
Draw what you see!
Wednesday, November 7
Journal: Why do cells look different?
Schedule: Finish Cell Lab
Homework: Letter to the SLP police
• When you are finished with your drawings, look on pages 68-69 of your textbook
• Write down 5 observations EACH about plant and animal cells.*Do this under your drawings in your SN*
Animal Cell(Human Cheek)
Plant Cell(Onion)
Copy into your SN
Slide #
OriginalClaim
New Claim Evidence (Why?)
Now that you know a little more about the differences between plant and animal cells, look back at your work from day 1. 1. In the chart, write down each number
that you looked at and your prediction2. Using what you’ve learned, write
whether it is a plant or animal cell AND why.
Reflection
Example
Slide #
OriginalClaim
New Claim Evidence (Why?)
34 Plant Plant I could see a large central vacuole, and only plant cells have them
Day 3
The situation
What have you learned/noticed about the shapes of plant and animal cells?
Animal:• Often irregular or odd shapes
Plant:• Often boxes or square shaped, sometimes
circles
Review - Shape
The situation
What have you learned/noticed about the organization of plant and animal cells?
Animal:• Often irregular or clumped
Plant:• Very organized or ordered, stacked on top
of one another, rows
Review - Organization
The situation
What structures do plant cells have that animal cells do not?
Let’s take a closer look.
Review - Structures
Animal and Plant Cell Comparisons
Cell Part Function/Job
Cell Wall
Large Central Vacuole (LCV)
Chloroplast
Create this table on a new page.
Functions/Jobs of Cell Parts• Please read/look over the following pages to
complete the table. Cell Wall – pg. 68 Chloroplast – pg. 72 Large Central Vacuole (LCV) – pg. 74 (HINT: Look
in the table at the bottom of the page)
Use the HEADINGS to guide your search for
information!!!
PAIR AND SHAREWhat is the function of the cell wall?
Cell Part Function/Job
Cell Wall gives structure and support to the cell
This is why plant cells have a defined shape!
PAIR AND SHAREWhat is the function of the large central vacuole?
Cell Part Function/JobLarge Central Vacuole (LCV)
stores water and other materials
When this isn’t full of water you will see the leaves of your plant droop, this means “I need water!”
PAIR AND SHAREWhat is the function of the chloroplast?
Cell Part Function/Job
Chloroplast uses the energy from sunlight to produce food for the plant
This process is called photosynthesis and it is a chemical reaction.
Cell Part Function/Job
Cell Wallgives structure and support to the cell (this is why plant cells have a defined shape)
Large Central Vacuole (LCV)
stores water and other materials (when this isn’t full
of water you will see the leaves of your plant droop, this means “I need water!”)
Chloroplastuses the energy from sunlight to produce food for the plant
(This process is called photosynthesis and it is a
chemical reaction.)
Create a Leaf• You are going to show all that you have just
learned by creating a leaf to hang on our tree.• Your leaf MUST:
List ALL THREE differences between animal and plant cells
Explain what each part does• For example
A plant cell has:
A _______ for _______
a _______ for _______
and a ________ for ________ .
Plant cells have:Large Central Vacuole (LCV)• Holds water and other materials
Cell Wall• Provides structure and support for the cell
Chloroplasts• Contain chlorophyll• Play a role in photosynthesis
The situation
• The medical examiner has attached a copy of the microscopic views of the cells found within the dead body. Please draw them in your science notebook and write 5 observations (BE SPECIFIC!)
*Use page #45 in your ISN (Right)*
Your task
Human body cells
Invading cells
The situation
• Next, submit your findings in a letter to the police department for formal review. *Remember, this is a professional document!*
Make your claim AND support it with evidence!!!
*Use page #44 In your ISN (Left)*
Your task
ATTN: SLP Police Department
I have some information to add to your case regarding the recent discovery of a dead body behind Westwood Middle School. It is my belief that . . .
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