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Machines and Energy
Vocabulary Terms for Section 2: Machines and Energy
| Term | Definition |
|---|---|
| Machine | A tool that allows us to use force in a convenient way |
| Worm | A special type of gear that has its ratio measured by the angle of the threads |
| Ramp | Used to make pulling something with wheels up a step |
| Work | Amount of force it takes to move an object combined with the distance it moves |
| Winch | A machine that uses a combination or an axle and a lever and is used to lift objects like a bucket out of a well |
| Gear ratio | Two gears connected by a chain, where the large gear turns once and the small gear turns two or more times |
| Lever | A simple machine that uses a fulcrum point |
| Power | The measurement of how much work something can do in a certain amount of time |
| Newton-meters | Measurement scientists use to measure work |
| Inclined planes | Examples of this include ramps, screws, and winding roads |
| Light | Visible energy |
| Potential | Stored energy that does not move |
| Chemical | Energy that is stored in chemicals, such as the energy stored in a battery |
| Energy | The ability to do work |
| Conservation of Energy | The fact that energy can never be created or destroyed |
| Heat engine | A machine that coverts heat energy into mechanical energy |
| Orbit | A repeating path in space that one object takes around another |
| Neap tide | When the sun and moon are not lined up resulting in less pull on the water which makes the tides less dramatic |
| Simple machine | Screwdrivers, pliers, and ramps are examples of this type of machine |
| Compound machine | This is made up of several simple machines |
| Fulcrum | The point where a lever is supported, also known as the pivot point |
| First-class lever | A lever whose fulcrum point is in between the input and output forces; examples include scissors, pliers, and crowbars |
| Second-class lever | A lever whose fulcrum point is at one end with the output force in the middle and the input force at the other end; examples include nutcrackers and wheelbarrows |
| Third-class lever | A lever whose fulcrum point is at one end with the input force in the middle and the output force at the other end; examples include BBQ tongs and tweezers |
| Solar system | The sun and everything that travels and orbits around it |
| Kinetic | The energy of motion |
| Mechanical | A type of energy that is in something that moves |
| Heat | A type of energy that is in moving molecules |
| Electrical | A type of energy that is in moving electrons |
| Light | A type of energy, visible or invisible, that comes from the sun or another light-generating object, such as a light bulb or fire |
| Atomic | A type of energy that is stored in the nucleus of an atom |
Created by:
TaylorMom
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