blue green algae
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Blue-green algaeBy: Tristan, James, Anthony, and
Ante
Day 1
paramecium bursaria
paramecium caudatum
blue-green algaeplasma membrane
size: cells<0.05 mm colonies can be many mm
x4 Magnification on Compound Light Microscope
size:180-250 micrometers in length
size:0.25 mm Long
Day 2 (part I)O We think that the microscopic picture of
paramecium caudatum slide shows us the better picture because it clearly shows the shape and details. The compound microscope makes things much larger than they are (from 10 times larger to 1000 times larger)
O Although the paramecium caudatum seems to be small, its structure is actually larger than the blue green algae and the paramecium bursaria.
Day 2 (part II)
Our blue-green algae
http://www.microscopy-uk.org.uk/mag/indexmag.html?http://
www.microscopy-uk.org.uk/mag/wimsmall/bacdr.html
x4 x25
Day 2 (part II)
Our paramecium caudatum
http://lh6.ggpht.com/_f1CAC3QQE_4/SiTacTzkd2I/
AAAAAAAAAKo/AOH27VbKVkg/DSC06781.JPG
x4 x10
Day 2 (part II)
Our paramecium bursaria
http://www.silkentent.com/gus1911/Pbursaria.jpg
x4 x30
Day 2 – What we Learned about the Microscope
O What we learned about microscopes is that it can make things that are invisible to our naked eye become larger and easier to identify.
O Microscopes magnify so that doctors and scientist can easily see bacteria, viruses, and other microscopic organisms.
O Microscopes helps students see tiny organisms that are only learned about in textbooks.
Day 2 – Extra Information Gained from this Lab
O On a compound microscope a light source illuminates the object on the slide.
O The source can be a mirror or it can be self-illuminating.O Light passes through the object and the lens nearest
the object, called the objective lens enlarges the image.O The eyepiece acts as a magnifier and produces an
enlarged image.O For magnification, the eyepiece magnification needs to
be adjusted 10x by the magnification of the objective lens (4x, 10x, 40x and 100x).
O With a magnification of approximately 2000x you can view bacteria, algae, protozoa and some human and animal cells.
Day 2 – This Lab could be Better if…
1. Every member of the group had a specific task or slide assigned.
2. A model of the assignment was presented before actually beginning this lab.
3. We had more group time during class hours.
4. The comparisons were focused between drawings and online pictures that were specifically comparing different assigned magnifications. (Ex. Viewing algae in x40 vs.. x100, etc.)