By Janice VanCleave
Why does a cat have a coarse tongue? Why is the sky blue? Why does anyone snore? How does a submarine upward push and submerge? research the solutions to those and different questions in biology, chemistry, physics, earth technological know-how, and astronomy via 2 hundred enjoyable and wacky, secure and reasonably cheap experiments that may be played at domestic or within the lecture room. In two hundred Gooey, Slippery, Slimy, bizarre, and enjoyable Experiments, bestselling writer and award-winning technological know-how educator Janice VanCleave brings jointly the easiest experiments from her well known technological know-how for each child series-plus forty all-new experiments-to support youngsters know about technological know-how the joys method. choked with illustrations, 2 hundred Gooey, Slippery, Slimy, bizarre, and enjoyable Experiments makes use of easy difficulties, actions, and tasks to provide an explanation for very important technological know-how rules via hands-on adventure. you could learn the way biology, chemistry, physics, earth technological know-how, and astronomy relate for your way of life through making interesting discoveries that lie correct at your fingertips! youngsters a long time 8-12
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Additional info for Janice VanCleave's 200 Gooey, Slippery, Slimy, Weird and Fun Experiments
Example text
Materials bar magnet 2 sheets of notebook paper iron filings, as found in magnetic disguise games drinking straw Procedure • Cover the magnet with one sheet of paper. • Fold the second sheet of paper and sprinkle iron filings in the fold. • Hold the paper about 6 in. (15 cm) from the magnet. • Blow through the straw. • Direct the stream of air at the iron filings in the folded paper. A stream of iron filings are blown toward the magnet. Results Particles of iron stick to the paper in the shape of the underlying magnet.
Light from objects in the sky passes through the Earth's atmosphere (hundreds of miles of air surrounding the Earth) before reaching your eyes. The Earth's atmosphere causes light to be refracted in the same way as does the jar of water. Because of the refraction of light, you see the Sun a few minutes before it actually rises above the horizon in the morning and for a few minutes after it sets in the afternoon. html 31/10/2004 Document Página 1 de 3 Page 10 17— Bright Spot Purpose To safely observe the image of the Sun.
Cover the openings with four layers of wax paper. Secure the paper with tape. • Fold a piece of aluminum so that it hangs in the center of the inside of the box, dividing the box. Secure the foil with tape. • Put the lid on. • In a darkened room, set the box on the floor and place the flashlight about 2 yd. (2 m) from the end of the box. • Observe the side windows. • Move the flashlight to 1 yd. (1 m) then ½ yd. (½ m) from the box's end. Results The side facing the light gets brighter as the light nears the box.