Challenge #1
Parts of the Microscope
T. Trimpe 2008 http://sciencespot.net/

Label the parts of the microscope
Eye Piece/Ocular lens
Diaphragm
Objectives
Nosepiece
Fine Adjustment Knob
Coarse Adjustment Knob
A
B
D
C
E
F

Nosepiece
Objectives
A
B
Diaphragm C
The answers are …
D
Eye Piece
Ocular Lens
E
F
Coarse
Adjustment
Knob
Fine
Adjustment
Knob

Challenge #2
Parts of the Microscope
T. Trimpe 2008 http://sciencespot.net/

Arm
Body Tube
Coarse
Adjustment
Diaphragm
Fine Adjustment
Objective Lenses
Eye Piece
Stage
A
B
C
D
E
F
G
H

A. Body Tube
B. Objective Lenses
A
C. Diaphragm
D. Eye Piece
E. Arm
B
F. Stage
G. Coarse Adjustment
C
H. Fine Adjustment
D
E
F
G
H

Challenge #3
What do you know about microscopes?
T. Trimpe 2008 http://sciencespot.net/

Answer these questions based on your knowledge of microscopes .
1. If you have three objectives – 10X , 30X , and 40X , which one has the lowest power of magnification?
2. Which of these images would be taken with a high power objective?
3. How does your view of a specimen change as you increase your power of magnification?

The answers are …
1. If you have three objectives – 10X, 30X, and 40X, which one has the lowest power of magnification?
10X
2. Which of these images would be taken with a high power objective?
HIGH POWER
3. How does your view of a specimen change as you increase your power of magnification?
You are able to see the specimen in more detail, but you cannot see as much of it.

Challenge #4
What do you know about microscopes?
T. Trimpe 2008 http://sciencespot.net/

Answer these questions based on your knowledge of microscopes .
4. Where should you hold on to the microscope when you carry it?
5. What is the scientific term for the eyepiece?
6. If the ocular lens has a power of 4X and the objective you are using has a power of 10X, what is your power of magnification?
7. What is the function of the diaphragm?

The answers are …
4. Where should you hold on to the microscope when you carry it?
Arm & Base
5. What is the scientific term for the eyepiece?
Ocular Lens
6. If the ocular lens has a power of 4X and the objective you are using has a power of 10X, what is your power of magnification?
4X x 10X = 40X
7. What is the function of the diaphragm?
It regulates the amount of light that passes through the specimen .

Challenge #5
What do you know about microscopes?
T. Trimpe 2008 http://sciencespot.net/

Answer each question about microscopes.
8. What part regulates the amount of light on a specimen?
9. If the eyepiece has a power of 12X and the objective has a power of 10X, what is the power of magnification?
10. What part of the microscope holds the objective lenses?
11. What part allows you to make small changes in your view of a
specimen?

The answers are …
8. What part regulates the amount of light on a specimen?
Diaphragm
9. If the eyepiece has a power of 12X and the objective has a power of
10X, what is the power of magnification?
12X x 10X = 120X
10. What part of the microscope holds the objective lenses?
Nosepiece
11. What part allows you to make small changes in your view of a specimen?
Fine adjustment knob

Challenge #6
Powers of Magnification
T. Trimpe 2008 http://sciencespot.net/

Fill in the missing information in the chart based on your knowledge of powers of magnification.
Ocular
Lens
Objective
Lens
Power of
Magnification
5 20
A
10
B
400
C
10 120

Ocular
Lens
5
X
Objective
Lens
=
Power of
Magnification
20
10
10
400
120

Do you know the critters you see in pond water?
T. Trimpe 2008 http://sciencespot.net/

Place the correct number next to each name
Mosquito Larva_____
Dragonfly Nymph____
Damselfly Nymph____
Mayfly Nymph____
Nematode_____
Water Flea_____
Rotifer_____

The answers are ...
Mosquito
Larva
Rotifer
Dragonfly
Nymph
Damselfly
Nymph
Water Flea
Nematode
Mayfly Nymph