Science Test 2
Study flashcards for science
Test 2
Test 2
Terms
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- liquid
- takes shape of container, spreads in direction of gravity
- convection
- the motion of currents in liquids and gasses. Warm particles rise (less dense) and less energetic particles (more dense) take thier place. Houses are warmed this way and convection currents form clouds/weather
- radiation
- the transger of heat energy in the form of infrared rays
- insulators
- do not conduct heat well. glass, wood, plastic and rubber
- all particles
- are constantly in motion except at absolute zero
- transferred
- energy can be _______ from one object to another
- Calories and BTUs
- are used to measure heat energy
- the amount of heat energy an object gets
- is dependent upon the source of the energy ANDthe amount of TIME exposed to the energy
- conduction
- the exchange of heat energy by direct contact of particles. Examples include the heating element on the stove and holding on to a hot curling iron. Takes place best in solids
- cold
- is the absense of heat
- heat energy
- the combined random kinetic energy of particles
- transforms
- energy changes _______ from one type to another
- transfer of heat
- the movement from a warmer object to a cooler object
- friction
- a force that acts in a direction opposite to the motion of the object moving. will cause an object to slow down and finally stop. produces heat energy
- solid
- has shape of its own, strong bonds b/t particles, molecule movement is smallest
- conductors
- conduct heat very well and quickly - most metals
- gas
- spreads in all directions, expands, greatest molecule movement