The microbes we call germs have been around for a loooong time, and, tiny as they are, they are excellent survivors. You can find traces of microbes in meteorites that have crashed to Earth from other planets and moons, on the tops of the coldest mountains, and bubbling merrily in deep sea volcanic vents. Microbes are survivors. If they "know" anything, it's how to spread and how to live in the most unlikely places.
Ancient cities grew up around rivers, for the rivers were the source of life for all the people and animals who lived there. The waters of the Nile were no different. They flooded every year, making the soil rich for growing crops.
In time, a civilization arose by the Nile whose wonders can still be seen today. From the Valley of the Kings to the great pyramids and the Sphinx, the almighty kings of Egypt left monuments to celebrate their glory for eternity.
You needn't take a boat, an airplane, or even a camel to discover this ancient place. You can discover lots about Egypt on the Web and in the library. Unearth the Nile's secrets with our Ancient Egypt Book List to guide you.
How do the Sun and the Moon affect the Earth? Without the Sun, the Earth would be a big ball of frozen mud, just another asteroid, drifting in space with no gravity to anchor it here and nothing to give us heat and light. We could not be here without the Sun.
The long hot days of summer are fast upon us, and with them there will be time for sports, time for camp, time to dream, and time to do. Time to start a diary or journal?
A journal can be written for only yourself, to write down the things that are important to you: lists of favorites (music, t.v., and movies), pictures of friends and family, and, of course, your innermost thoughts. Fun times deserve to be remembered, and sometimes writing about a bad situation can help you deal with it better as you think it through on paper. That kind of journal is personal, and you may not wish to share it with anyone.
How does a flashlight work?
By using a battery hooked up to an electrical circuit system.
How does an electrical circuit system work?
A battery has negative electric charges and positive electric charges. If you look at a battery, you will see that there is a + sign at one end and a - sign at the other. The opposite charges are drawn to each other, but without an easy path, they will remain separated. That's where a circuit comes in handy.
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