By Janice VanCleave
How do honeybees locate their manner domestic? Why is Venus so sizzling? how will you degree the rate of the wind? What makes a valid loud or gentle? observe the extraordinary solutions to those and different attention-grabbing mysteries in biology, chemistry, physics, earth technological know-how, and astronomy. simply attempt those 201 enjoyable, secure, reasonably cheap experiments at domestic or within the school room. you are going to glance through a drop of water to determine how a magnifying lens works. utilizing a Styrofoam ball, a pencil, and a lamp, you will examine why the Moon appears to be like and disappears. With only a jar and a few ice cubes, you could display how rain is shaped. each one test comprises an indication and simple to stick to step by step directions. This significant other quantity to the tremendously well known 2 hundred Gooey, Slippery, Slimy, bizarre, and enjoyable Experiments brings jointly magical tasks from Janice VanCleave's technological know-how for each child and extraordinary technology tasks series—plus forty all-new experiments that make technology come to existence.
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Extra resources for Janice VanCleave's 201 Awesome, Magical, Bizarre, and Incredible Experiments
Example text
Results The dots made by the slanted markers are farther apart. Why? The standing markers represent direct rays from the Sun and the leaning markers represent slanting solar rays. Just like the marks left by the pen, the distance between slanting solar rays is greater. Areas that receive direct rays from the Sun are much hotter. The Earth's equator receives about 21/2 times as much heat during the year as does the area around the poles. Mars, like the Earth, has colder pole areas. Both of these planets are slightly tilted from the path of the Sun's rays, causing the center to receive more direct solar rays than do the poles.
Why? The coin is smaller than the tree, just as the Moon is smaller than the Sun, but they both are able to block out light when they are close to the observer. When the Moon passes between the Sun and the Earth, it blocks out light just like the coin blocks your view of the tree. This is called a solar eclipse. The Moon moves around the Earth about once a month, but a solar eclipse does not occur monthly. The Moon does not orbit around the Earth's equator, and the Earth's axis is tilted, so the Moon's shadow misses the surface of the Earth most of the time.
Release the tape and allow it to hang freely. • Keep the spoon spinning by moving the thread spool in a circular motion. • Observe the movement of the tape roll. Results The spoon spins in a circular path with only the weight of the tape pulling on the attached string. Why? Any circling object, spoon or satellite, has a centripetal force (force directed toward the center) keeping it in its circular path. Moons that orbit planets and planets that orbit the Sun are all pulled toward the celestial body that they orbit.