Name
Date
"--
Class
Moueneus
Problem: How do blue-green bacteria and bacteria compare?
Skills
make and use tables, observe, measure in SI,
use a microscope
Materials
gI
10. Repeat steps 2 through 9 with the bacteria
slide. See Figure B.
Data and Observations
1. Which organism is smaller?
mlcroscope
prepared slide of Anabaena
prepared,slide of bacteria
petri dish
metric ruler
2. Which organism lives
Procedure
l.
Study the data table.
2. Use the low-power objective to locate a
strand of Anabaeno, Figure A.
3. Observe: Switch to the high-power objective
of your microscope and observe the
Anabaena. Look for cell parts inside the
4.
6.
6.
t*
cells.
Complete the first three rows of the data
table for Anabaena.
Using the petri dish as a guide, draw a
circle on a sheet of paper.
Look through the eyepiece ofthe
microscope. Draw one cell in the circle.
(Pretend that the circle is the view through
the eyepiece. Draw the cell the same size it
appears through the eyepiece. This is called
drawing to scale.)
7. Measure in SL Measure the length of your
Anabaena diagram in millimeters.
8. Record this number in your data table.
9. To find the actual length of the cell,
multiply the length of your diagram by
0.0035. Use a calculator to help you. Record
your answer.
as a single cell?
Anabaena
Shape of cells
Bacterium
round and
oblong
Single cell or
filament
Color
Length of diagram
Actual length of cell
Analyze and Apply
1. Which organism can make its own
food?
2. To which kingdom do Anabaena and
bacteria belong? How do you know?
15
Date
3. Apply: How do blue-green bacteria and
other bacteria compare?
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Class
Extension
Observe other bacteria and blue_green bacteria
under the microscope. Compare th-ese with
Anabaena and the bacterialn this lab.
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