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Ancient Science. 40 Time-Traveling, World-Exploring, by Jim Wiese

By Jim Wiese

Dig into the technology of precedent days and unearth striking 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 how you can notice earthquakes, or learn how to write in hieroglyphics?
* Are you searching for nice rules on your subsequent technological know-how reasonable venture?

should you responded "Yes" to any of those questions, then old technology is for you! From Greek lighthouses and Roman bridges to chinese language kites and Mesopotamian cleaning soap, you are going to examine the various maximum medical discoveries and the folks 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 varied sounds, how fireworks get their explosive strength, and masses extra. the entire tasks are secure and simple to do, and all you would like is daily stuff from round the condominium. So step again in time and take an grand trip with old technological know-how!

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

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6. Use the scissors to cut along the line, creating two cardboard triangles. 7. Tape one cardboard triangle along the 12:00 line on the sundial base so that it is perpendicular to the base. Use the protractor to make sure that the triangle is exactly 90 degrees to the base. 8. Take your sundial outside on a sunny day. Use the compass to align your sundial so that it points north, as shown below. Compare the time on your sundial to the real time. How accurate is it? More Fun Stuff to Do This sundial will be more accurate at latitudes from 40° N to 50° N.

Draw a line around the outside of the thin cardboard, creating an 8-inch (20-cm) square on the inside of the 10-inch (25-cm) cardboard. This is your sundial base. 2. Find the midpoint of two opposite sides of the square you drew by measuring 4 inches (10 cm) from the corners. Connect the midpoints to divide the 8-inch (20-cm) square into equal halves. This line represents 12:00. 3. Using the protractor, measure and mark the angles listed below to the left of the 12:00 line as shown in the diagram.

You can easily answer this Quick, question by looking at a wall clock or your watch or even a computer. But how did people tell time before mechanical clocks were invented? The Egyptians invented several ways to use shadows cast by the sun to tell time. E. Try this activity to make your own sundial and find out how it works. qxd 12/12/02 7:00 PM Page 40 Materials 8-inch- (20-cm) square piece of thin cardboard 10-inch- (25-cm) square piece of thick cardboard pencil protractor ruler scissors tape magnetic compass Procedure 1.

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