Carolyn N. Kinder
Objective The student will learn to formulate questions and concerns about his/her observations.
Observation Solutions have been made of the substances you viewed earlier. Place a drop of one solution on a microscope slide, use a toothpick, and watch the drop through the microscope as it slowly evaporates. For each solution try answering the following questions:
1. Do you see crystals right away?
-
2. Do you see them in a half a minute? A minute? More?
-
3. How fast do the crystals grow?
-
4. How large to they get?
-
5. Where do crystals start to grow in the drop?
-
6. Are the shapes familiar? Compare them with the ones you saw in activity I.
-
7. Why do the crystals seem to stop growing?