Notes from Janice’s Desk I received an email from a mom who referenced the note with “Desperate MOM-Please Help Me. This frantic mom was in a panic over her son’s science assignment. It was to be a parent/child project. I wondered how difficult an assignment kindergarten kids could be. At my request, she faxed the […]
Archives for 2010
Adhesion
Question: Why is syrup sticky? Answer: Cohesion is the force between like molecules, such as between two water molecules or between molecules in syrup. One syrup molecule sticks to another syrup molecule because of cohesion. If you want to know why syrup sticks to your fingers, it is because of adhesion, which is the force […]
Biology: Seed Dispersal
I have painful memories of walking barefoot through what appeared to be a field of soft grass. Some of the grass had produced sharp pointed fruit. While the spikes on some of the fresh burr fruit were not as stiff, they still were able to penetrate the tough skin on my feet. As the fruit […]
Physics: Newton’s Second Law of Motion
The photo shows two groups, each pulling in a different direction on a rope. When the combination of forces on each side equal, the forces on either side are said to be balanced. The ribbon tied in the middle of the rope indicates motion as well as the direction of the motion. If one team […]
Earthworms: Regeneration
Annelids are worms with rings, such as earthworms. Use a magnifying lens to examine the surface of an earthworm. Notice the individual segments. Adult night crawlers have up to 170 segments while red wigglers have about 95. On the first segment is the mouth and on the last segment is the anus. In the video, […]
Physics: Newton’s Third Law of Motion
Hero’s Engine Newton’s third law of motion says that for every action there is an equal reaction in the opposite direction. The spinning cup in the diagram is an example of this law. The Action-Gravity forces the water in the cup out of the straws in the cup. The direction of the water is determined […]
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