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5 Science Chapter 6
| Term | Definition |
|---|---|
| force | a push or pull; necessary for motion |
| gravity | the force of attraction that exists between any pair of objects |
| matter | anything that takes up space & has mass & weight |
| contact force | the force that occurs when object pushes against another |
| friction | the force that resists motion |
| lodestones | a piece of naturally magnetized iron ore |
| work | the result of a force moving an object |
| energy | the ability to do work |
| chemical energy | a special form of potential energy stored in the bonds that hold molecules & chemical compounds together; released as heat |
| kinetic energy | energy of motion |
| potential energy | stored energy |
| transfer of energy | occurs when one object gives some or all of its energy to another object |
| engine | a device that converts energy from a natural source into useful work |
| condenser | a device that converts gases or vapors to a liquid state |
| combustion | burning |
| fluid | a substance that can flow from one place to another; such as a liquid or gas |
| cylinder | of an engine, a hollow, cylinder-shaped compartment in which a piston moves back & forth |
| piston | a disk that moves back & forth inside a hollow cylilnder |
| octane number | a number indicating the anti-knock quality of a gasoline |
| turbine | a wheel of curved blades that spins a drive shaft; changes the force exerted by things such as wind or pressurized gases into rotary motion |
| turbofan | a jet engine with a large fan at the very front |
| turboprop | a jet engine used to power a propeller |
| ramjet | a jet engine that can a function only at high speeds because it has no turbine |
| missile | a guided military rocket |
| payload | the cargo that is carried in the nose of rocket |
| attract | opposite poles or charges __________ each other when they are brought close together |
| repel | like poles or charges ________ each other when they are brought close together |
| wind power | sails, windmills & wind turbines are devices that harness this kind of power |
| water wheel | device developed to harness the power of moving water |
| gas and liquids | states of matter that have no permanent shape |
| diffusion | tendency of gases to spread themselves out thinly |
| melting point | temperature at which a solid changes into a liquid |
| freezing poing | temperature at which a liquid changes into a solid |
| 32 | degree Fahrenheit temperature of melting and freezing point of water |
| boiling point | temperature at which a liquid changes into a gas |
| condensation point | temperature at which a gas changes into a liquid |
| 212 | degree Fahrenheit temperature of boiling and condensation point of water |
| diesel | type of internal combustion engine that produces no spark |
| rocket | type of engine that carries its own supply of oxygen |
| oxidants | oxygen rich compounds |
| propellant | fuel & oxidants that combine to form expanding gases which pus h the rocket forward |
| solid fuel rocket | type of rocket that use propellants |
| liquid fuel rocket | type of rocket that burns a liquid fuel after mixing it with a liquid oxygen |
Created by:
Mrs_CC
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