Science Concepts

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Atmosphere

Back

The mixture of gases that surrounds the earth and other planets. Example: The earth's atmosphere is made up of 78% nitrogen, 21% oxygen, and 1% argon, carbon dioxide, and other trace gases.

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Attract

Back

To pull or draw someone or something towards oneself. Example: A magnet is attracted to objects with iron in them.

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Balance

Back

The point where two things are equal in weight or force. Example: Two teams pulling on a rope with equal force.

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Center of Gravity

Back

The center of mass of an object or thing. Also known as the point where gravity can be said to act. Example: In the human body, the center of gravity is an imaginary point that would exist if you crushed your body into a single, centrally located point. This point lies behind and just below the navel.

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Circuit

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A path that ends at its beginning. Example: A path where electrical current can flow in a circle.

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Column

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An upright shaft or pillar, or a vertical, roughly cylinder-shaped thing. Example: A great column of smoke.

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Compression

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To press something into a smaller space. Example: Your lungs can compress air into a balloon.

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Data

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A collection of facts and statistics collected together for reference or analysis.

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Demonstrate

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To show something and explain how it works.

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Dimension

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A measurement of the length, depth or height of an object.