Download Ancient Science: 40 Time-Traveling, World-Exploring, by Jim Wiese PDF

By Jim Wiese

ISBN-10: 0471215953

ISBN-13: 9780471215950

Dig into the technology of precedent days and unearth notable discoveries!
* have you questioned the place paper comes from, who made the 1st identified maps, or how the traditional Egyptians have been capable of construct the pyramids?
* do you want to make your individual sundial, become aware of find out how to notice earthquakes, or discover ways to write in hieroglyphics?
* Are you searching for nice principles on your subsequent technology reasonable venture?

If you spoke back "Yes" to any of those questions, then old technological know-how is for you! From Greek lighthouses and Roman bridges to chinese language kites and Mesopotamian cleaning soap, you'll examine many of the maximum clinical discoveries and the folk who brought them to the realm. Dozens of fun-packed actions assist you see for your self how the earliest people cultivated vegetation, why tools make various sounds, how fireworks get their explosive strength, and masses extra. all the tasks are secure and simple to do, and all you wish is daily stuff from round the residence. So step again in time and take an grand trip with historic technological know-how!

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Read or Download Ancient Science: 40 Time-Traveling, World-Exploring, History-Making Activities for Kids PDF

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Additional resources for Ancient Science: 40 Time-Traveling, World-Exploring, History-Making Activities for Kids

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Continue to mark the water level every minute until all the water is gone. 5. Tape the hole again and refill the top container with the water from the bottom container. Remove the tape. You now have a water clock that tells time. You can estimate the times between the marks. 48 Explanation Water will fall from the top milk jug to the lower container. You will be able to read the time from the start of the water falling by looking at the marks on the lower pail. The water clock works because liquids flow at a constant rate out of a small hole.

Use two pieces of string to tie the rock to the mouth of the plastic jar so that the rock hangs about 2 inches (5 cm) directly below the center of the jar’s opening. Secure the string in place with tape. 2. Insert one end of the tubing into the jar so it extends into the bottom of the jar. Bend the tubing near the mouth of the jar and tape it to the outside of the jar. 3. Fill the sink or tub with water. 4. Pinch the free end of the tubing closed and place the jar in the water so that the rock hangs below it.

You will be able to read the time from the start of the water falling by looking at the marks on the lower pail. The water clock works because liquids flow at a constant rate out of a small hole. The Greek clepsydra water clock used water-filled cylinders. When water dripped through the cylinders, a pointer moved and marked the hour on a graduated scale. All timing devices, from the water clock to the digital watch, operate because of the fundamental principal that a regular pattern or cycle operates at a constant rate.

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Ancient Science: 40 Time-Traveling, World-Exploring, History-Making Activities for Kids by Jim Wiese


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