Download Activity 6 - Issaquah Connect

Anticipation Guide:
Before storting the
statement below.
M icro-bes
octivit¡ mork whether you ogree (+) or disogree
(-)
with
eoch
After completing the octivity, mork whether you ogree (+) or disagree (-) with eoch
stotement below Under eoch stotement, exploin how the octivity gove evidence to support
or change your ideos.
a
Before After
2.
Most protists ore single-cellg-d orgonisms thot con only be
seen with o microscoPe.
3.
Some protists hove chloroplasts
4.
Most bocteriq qre hormful,
5. There ore more bocteriql cçlls thon humon cells in your
(t
E
bodY.
,e
ö
o
ò
n
5
ù
s
6.
Viruses contoin genes
7.
Viruses ore the smollest cells known.
o
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SEPUP Cetl Structure and Function'Student Sheet 6.1
Activity 6: Microbes
Stop and.Thlnk 1
Would you describe bacteria as being harmfulor helpfulto people? Explain.
Stop and Thlnk 2
a) Why are viruses not considered to be microorganisms?
b)
Look at the figure on p, 33, "Comparing Average Sizes of Microbes'r, How do the sizes of
protists, bacteria and viruses compare?
c)
Which do you think cannot be seen with a classroom microscope?
Activity 6: Analysis Questions
1.
Fill in the
"AfteÉ column for the statements on the Anticipation Guide. Did yourthinking
change?
2,
Look at the list of words shown below:
I
Ust 2
list
animals
animalcell
protists
bacteria
cellwall
bacteria
plants
plant cell
animals
protists
chloroplasts
plants
respire
mitochondria
eukaryotes
viruses
nucleus
nucleus
List
a)
3
ln each llst, look for a relationship among the words, Cross out the word or phrase that
does not belong.
b)
ln each list, circle the word or phrase that includes the others.
c)
Explain how the word or phrase you circled is related to the other words on the list.
3.
You have read how microbes can be both helpful and harmfulto humans. Do you think
microbe can be neither helpful or harmful? Explain.
4.
You decide to examine some pond water under a microscope. With a magnification of 40 (using
the 4X objective), you observe a long, cylindricalorganism moving across the field of view. As
you look more closelv, vou notice what appears to be a round structure inside of it. ls this
a
organism most likely a protist, bacterium orvirus? Explain.
5.
Suppose your school's microscopes did not have 40X objectives, but only 10X objectives. Your
friend who is in high school uses a 40X objective. Explain what group of microbes he or she can
study that you cannot.
6.
What are the advantages of using the highest power objective on a microscope? What are the
advantages of using the lowest power objective on a microscope? Explain.
7.
Using the Venn Diagram below, record the unique features of each group of microbes. Record
common features in the space that overlaps. HINT: Think about what you have learned about
cells in the last few activities.
Protists
Bacteria
Viru ses
8.
Reflection: On a field trip, you visit a laboratory that has an electron microscope. The
microscopist (the person who runs the scope) offers to set up a microbe for you to view. What
microbe or group of microbes would you choose to view? Why?