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| Force is something that changes the motion and/or shape of an object. |
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| A theory is a scientists conclusion of why something happens the way it does. |
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| The amount of matter in an object. |
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| The tendency of objects to resist a change in motion. |
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| In physics a vector can represent a directional force. Vectors have both direction and magnitude or strength. |
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| A machine that converts heat energy into mechanical energy. (This can be a natural machine like a hurricane.) |
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| An object that orbits another object. |
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| A force that resists motion and produces heat. |
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| Galileo Galilei (1564-1642) conducted many experiments dealing with the earth's gravitational pull. Many of his experiments were done on the famous Leaning Tower of Pisa. Like many scientists with new ideas, his peers did not accept his discoveries and considered him a heretic. |
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| Speed equals the distance traveled divided by the amount of time it took. |
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| Newton's 3 Laws of Motion |
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1. Tendency of objects to resist a change in motion.
2. A force causing an object to speed up or slow down is equal to the mass of that object. Force = Mass X Acceleration- Simply put it takes more effort (force) to get an object with a lot of mass to move or change direction than it does an object with less mass.
3. For every action, there is an equal and opposite reaction. |
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| The Solar System consists of our sun and everything that travels (orbits) around it. |
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| The Study of the mechanics of how fluids flow |
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| A method for conducting science that usually includes and observation, hypothesis, experiment, and theory. |
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| A substance that reduces friction between two moving surfaces. |
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| A force that continually pulls a spinning object toward its center. |
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The rate of change of velocity in relation to time.
(See Newton's 2nd law of motion) |
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| The pressure in a fluid decreases as the speed of the fluid increases. |
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| A repeating path in space that one object takes around another. |
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Anything that is observed that is consistent
(happens the same each time) |
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| A substance that flows with relative ease. Water (liquids) and air (gas) are both fluids. |
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| Pressure is the amount of force on a certain amount of surface area. |
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Every action is accompanied by a reaction of equal magnitude but opposite direction.
(Newton's 3rd law of motion) |
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| The straight line change in position of an object. |
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| A strong tide that happens when the sun and the moon are aligned with the earth. |
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| A scientists "best guess" as to why something is happening. |
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| A force that pulls all things toward each other. |
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| Buoyancy is the upward pushing force of a fluid against an object that is pushing down against that fluid. |
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| The speed of an object in a certain direction |
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| A scientific instrument used to compare the density (specific gravity) of fluids to pure water. |
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| A weak or lower tide that happens when the sun and moon are not aligned with the earth |
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