Transcript File - Mr. Connolly`s Biology Page

Yogurt bacteria at 400x
magnification:
Bacteria
chain
Lab Objectives
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RST 3 – Follow precisely a complex multistep
procedure when carrying out experiments, taking
measurements, or performing technical tasks, attending
to special cases or exceptions in defined in the text.
RST 7 – Translate quantitative or technical information
expressed in words in a text into visual form and
translate information expressed visually or
mathematically.
WST 2.a – Introduce a topic and organize ideas,
concepts and info to make important connections and
distinctions; include formatting and graphics.
Comparing Cells Lab (pages
94-95)
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Pre-lab questions: complete in your notebook.
1. List the common features of all cells.
2. What are the defining features of Eukaryotic
cells?
3. Identify three unique features of plant cells.
4. How do you calculate the power of
magnification on a microscope?
5. List the possible dangers associated with the
lab and how we will protect ourselves.
Comparing Cells Lab - Part 1
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Observing animal cells – procedure
1.
Watch Mr. Connolly prepare the cheek cell
slide – record the step by step procedure.
Carefully prepare your own cheek cell slide.
(One per group)
Follow steps 3 and 4 from part A on Page
94.
Complete all work in your team’s lab report!
CLEAN UP AND RETURN YOUR SLIDE
AND THE COVERSLIP
2.
3.
4.
5.
Comparing Cells Lab - Part 2
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Observing plant cells – procedure
1.
Follow steps 5 through 12 from part B on
Page 94 and 95.
Complete all work in your team’s lab report.
CLEAN UP AND RETURN YOUR SLIDE
AND THE COVERSLIP
2.
3.
Comparing Cells Lab – Part 3: Observing
Prokaryotic Cells.
1.
2.
3.
4.
5.
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Watch Mr. Connolly prepare the yogurt slide – record the
step by step procedure in your notebook.
Carefully prepare your own yogurt slide. (One per group)
Under low power magnification find a section where the
yogurt is pretty thin; this is where you will find the bacteria.
Switch to high power (400X for most microscopes) for a
better view of the bacteria.
Make a sketch of your view under the strongest
magnification. Label the bacteria on your sketch.
CLEAN UP AND RETURN YOUR SLIDE AND THE COVERSLIP
Comparing Cells Lab – Part 4
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1.
2.
3.
Identifying unknown cells procedure
Follow steps 13-16 on page 95.
Record your classification table into
your notebook.
Note: the unknown cells can be plant,
animal or prokaryotic. Use your
knowledge of all three types of cells to
identify the unknowns.
Comparing Cells Lab – Part 5
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1.
2.
Clean-up, Analysis Model and Conclusion
Summary
Make sure that your table is cleaned up completely –
microscope away and slides returned.
Create a model or diagram that:
A.
B.
C.
3.
Shows the shared traits of all three types of cells.
Shows the differences between all three types of cells.
Can be used to help identify an unknown cell.
Write a summary of the lab that includes the skills and
information learned as well as some future applications
to real life situations.