1. Quantitative observations with Microscopes

2. Estimating a Measurement
Start point = zero
1 mm
Size of bee?
4.7 mm

3. Estimating a Measurement
How big is the apple?
0.5m 1m

4. Estimating a Measurement
How big is the apple?
0.33m 1m

5. Estimating a Measurement
How big is the computer?
0.50cm
50cm

6. Estimating a Measurement
How big is the ball?
0.25cm
50cm

7. Measuring using a Microscope
Field of View/Vision- circular area seen when looking into eyepiece
40x =
100x =
400x =
4.5 mm
2 mm
0.5 mm

8. This organism is being observed under 400x, what is it’s size?
0.25 mm
Hint: What is the size of the diameter of the field of view at 400x?
If this organism was being observed under 40x instead, what is it’s size?
2.25 mm

9. 40x
SMILEY FACE ( )

10. Making a Scientific Drawing
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11. Scientific Drawings Views
Purpose: allow scientists to share data in an efficient,
meaningful way
Views
Dorsal: from above, backside of organism
Lateral: from the side
Ventral: from below, underside of organism
Anterior: from front, forward facing
Posterior: from behind, rear of organism
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Field of View/Vision- circular area seen when looking into eyepiece

12. Scientific Drawings - Guidelines