 | How concerned are 7th graders with their health?
In the world today, there is much concern about being healthy. This is especially important with adolescents, because what they do now will set a pattern for their health habits later in life. If they are not very healthy, this can lead to disease and other complications. Still, many teenagers do not pay much attention their health habits. This experiment was conducted to really see how conce |
| | Difficulty: Middle school |
| How does the iris work?
The iris is the muscle that lets the proper amount of light through the pupil and into the eye. It opens when there is little light and closes when there is a lot. The students can illustrate this for another. |
| | Difficulty: Elementary school |
| | | Difficulty: Elementary school |
| How exactly do eyeglasses work?
There are a lot of things our eyes have to do perfectly for us to have perfect sight. If just one of those things is not quite right, we need glasses. But the glasses have to be made just for you and your unique eyes. Eyeglasses work by bending light beams so that they meet right at the back of our eyeballs on the retina (RET-in-ah). The retina changes light into signals that go to the brain. |
| | Difficulty: Elementary school |
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