Why Is It Hotter in Summer than in Winter?
Why Is It Hotter in Summer than in Winter? During the summer, the sun shines most directly on the earth, bringing more heat. The earth tilts, or tips, a little to one...
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How Fast Does Light Travel?
How Fast Does Light Travel? Light travels very fast. In just one second, it goes 186,282 miles (229,792 kilometres), and at this speed takes about eight minutes to...
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What Is the Milky Way?
On a clear night you can see a pale white path of light that stretches across the sky. It is what we call the Milky Way. It is the light from the billions of stars that...
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How Does the Sun Tan My Skin?
How Does the Sun Tan My Skin? Sunlight tans, or darkens, your skin by causing the skin to produce extra amounts of a skin coloring pigment called “melanin.”...
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Why Is the Sky Blue?
The daytime sky is blue because of what happens to sunlight as it enters the Earth’s atmosphere. When the Sun is low near the horizon as it rises or sets, the...
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