science test thursday
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Created by:
jsussman17 on January 11, 2012
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21 terms
Terms | Definitions |
|---|---|
 energy | the ability to do work and is neccassary for all changes |
| mechanical energy | energy in form of motion |
| heat energy | internal motion of particles |
| chemical energy | energy that bonds atoms together |
| electromagnetic energy | moving eletric charges |
| work | transfer of energy through motion |
| tempurture | measures avarge kinetic energy of molecules |
| what does celsius biol at | 100 |
| what does celsius freeze at | 0 |
| heat | needed to set molecules in motion causes temp to rise |
| thermal energy | flows something with a higher temp |
| conduction | when heat is moved from one object to another by colision |
| convection | when heat is moved from one object to another throught density currents |
| radiation | when energy is transfered through space |
| inslators | doesnt allow heat to move through eaisly |
| resistance | an insulation rating ski jacket- R-7 indoor walls- R-19 Outdoor walls- R-30 |
| r-value | resistance - value an isulation rating/the higher the #, the better the insulation examples ski jacket- R-7 indoor walls- R-19 Outdoor walls- R-30 |
| what are some examples of condution | direct contact, pan cooks food on stove. |
| what are some examples of convection | hot air balloon, hot air heats a cold room |
| what are some examples of radiation | heating food in oven or microwave. |
| note | conduction is through direct contact convection is through liquid and air and radiation is through air |
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