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Physical Environment > Pressure |
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This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand. |
| Pressure is felt when a gas or other substance is squashed. Pressure is measured by working out the force on a unit of area of the surface of the substance. | ||
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Physical Environment > Pressure |
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Basic Information |
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