 | | | Difficulty: Elementary school |
| | | Difficulty: High school |
| How to make your own comet
In ancient times, people did not understand the objects in the sky, how they moved or what they were. They did not know what a comet was, where it came from, or where it went. A large comet is a spectacular sight and inspired both awe and fear in primitive peoples. |
| | Difficulty: Elementary school |
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| How to make your own sundial
Sundials are the oldest way to tell time. The position of the sun changes during the day. The sun doesn't move; the Earth rotates around the sun, making it seem like the sun rises in the east and sets in the west. As the sun goes across the sky, the post in the center of the sundial casts a shadow on a circular plate. Marks on the plate tell you what time it is. It's just like reading a clock! |
| | Difficulty: Elementary school |
| How to measure the diameter of the sun
The earth is approximately 150,000,000 km from the sun. This distance varies somewhat with the seasons because of Earth's elliptical orbit. Yet, a simple instrument can be constructed which will provide measurement data that permits a relatively accurate measurement of the sun's diameter.
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| | Difficulty: Elementary school |
| | | Difficulty: Elementary school |
| Understanding and identifying black holes
Physicists have predicted that at the Big Bang, black holes with sizes from 10^-5 grams up to perhaps solar mass size might have been formed. Use the above formulae to predict the mass range of the black holes would have lasted as long as the present age of the universe, between 9 billion to 15 billion years, and which should just now be evaporating completely away. Predict what the final few thou |
| | Difficulty: High school |
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Science kits, science lessons, science toys, maths toys, hobby kits,
science games and books - these are some of many products that can
help give your kid an edge in their science fair projects, and develop
a tremendous interest in the study of science. When shopping for
a science kit or other supplies, make sure that you carefully review
the features and quality of the products. Compare prices by going
to several online stores. Read product reviews online or refer to
magazines.
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