What Causes Tidal Waves?
What Causes Tidal Waves? A tidal wave is a regularly reoccurring shallow water wave caused by effects of the gravitational interactions between the Sun, Moon, and Earth...
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How Does a Sundial Tell Time?
How Does a Sundial Tell Time? Long before we had clocks, people used sundials to tell time. A sundial tells time by measuring the angle of a shadow cast by the sun. A...
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How Hot Is the Moon?
The sun beats down on the face of the moon without mercy and the heat generated is almost twice that of the hottest day on earth. This scorching goes on without letup...
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What Makes the Colors in a Rainbow?
After a shower of rain there is often a rainbow. Rainbows form when the sun begins to shine through the clouds while the air is still filled with raindrops. The...
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How Are Stars Formed?
A star like our sun is born inside a huge cloud of gas and dust. A globe of space matter grows as it sweeps up surrounding matter by gravitational attraction. As the...
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