What Causes Weather?
What Causes Weather? Most weather phenomena occur in the troposphere, just below the stratosphere. Weather refers to day-to-day temperature and precipitation activity,...
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Why Do We Get More Sunlight in the Summer than in the Winter?
Why Do We Get More Sunlight in the Summer than in the Winter? You might not have noticed from just standing the Earth’s surface but the whole Earth tilts over...
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When Does a Hill Become a Mountain?
When Does a Hill Become a Mountain? There is no exact rule that indicates when a hill becomes a mountain. But scientists who study the surfaces of the Earth usually...
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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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What Is Clay?
Clay is a special kind of earth. It is made up of the smallest particles of rock, tinier than those in most other kinds of soil. The minerals that make up ordinary clay...
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