By Robert Gardner
Why does not the Moon fall to Earth? Why do the seasons swap? what's parallax? how will you simulate weightlessness in the world? younger scientists will discover the sun process via utilized area technology answering questions on area. The far-out area experiments during this ebook might help scholars make a version of a lunar eclipse, construct a spectroscope, and extra! Many experiments contain principles scholars can use for technology reasonable initiatives.
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When they enter Earth’s atmosphere, they are called meteors. Occasionally a comet becomes visible as it moves close to the Sun. The orbits of comets are very long ellipses, unlike the nearly circular orbits of most planets. A meteorite is a meteor that has survived its fiery path through the atmosphere and struck Earth. Some meteorites are huge. One that landed in Canada was nearly 3 km (2 mi) in diameter. An even larger one that struck Central America about 65 million years ago will be discussed in the next section.
FIGURE 2 While you are measuring the North Star’s altitude, have someone help you mark a north-south line of sight along level ground. While you stand looking at Polaris, you can direct your helper so that he or she is in line with Polaris. This will allow you to establish a straight line from the star to you. Markers at your position and the position of your helper will provide a north-south line that you will find useful in later experiments. 2 Building a Sundial to Find the Path of the Sun Materials: an adult hand drill square board, about 30 cm (12 in) on a side ruler new, unsharpened pencil pencil sharpener sandpaper carpenter’s level white paper scissors tape protractor tape measure map pins and mesh strainer, or colored pens and clear dome The Sun does not follow the same path across the sky each day.
3 to figure out the reason. 6 mi/sec. Its speed is slightly greater when it is closer to the Sun and slightly less when it is farther from the Sun. Therefore, Earth moves slightly faster around the Sun in the winter and a bit more slowly in the summer. FIGURE 14: Earth's elliptical orbit about the Sun is shown. The elliptical nature of the orbit is greatly exaggerated; it is really almost a circle. 1 The Diameter and Volume of the Sun and Earth Materials: clay ruler You know that the Sun’s diameter and girth are 109 times bigger than Earth’s.