Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. How do you know if something is alive? Describe some of the characteristics of living things.
Composed of one or more cells, growth and development, ability to reproduce,
responsiveness to the environment, and using food to provide energy to their cells, and
maintaining homeostasis.
2. Humans, plants and mushrooms are all alive. What do these organisms have in common?
They all share the characteristics of life.
Gizmo Warm-up
In the Cell Types Gizmo, you will use a light microscope to compare and contrast
different samples. On the LANDSCAPE tab, click on the Elodea leaf. (Turn on Show all
samples if you can’t find it.) Switch to the MICROSCOPE tab to observe the sample as it
would appear under the microscope. By default, this microscope is using 40x
magnification.
1. Drag the Coarse focus slider until the sample is focused as well as possible. Then, improve the focus
with the Fine focus slider. What do you see?
I see a pattern of cells.
2. Select the 400x magnification. If necessary, adjust the fine focus. Now, what do you see?
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