# Shared Flashcard Set

Physics
Chapter 6
23
Science
03/02/2009

## Additional Science Flashcards

Term
 define heat
Definition
 A form of energy resulting from the motion of particles in matter
Term
 Heat flows from a warmer object to a ________ object
Definition
 cooler
Term
 Where does the sun's heat come from?
Definition
 Nuclear Reaction
Term
 What is fusion
Definition
 the reaction that occurs when atoms are joined together and energy is released
Term
 When was the 1st steam engine produced
Definition
 before 300ad by the greeks
Term
 Friction is a form of ______ ______- the energy of _______that produces heat.
Definition
 mech. energy; motion
Term
 Heat causes paricles to move faster and move farther apart. heat can also _____ _____ from one _____ to another
Definition
 change matter; molecule
Term
 Why does water boil?
Definition
 the gas particles are moving fast, they bump each other more often and push other apart.
Term
 cooled water ______ until 4*C then it begins to _____ at ___
Definition
 contracts, expands; 0*C
Term
 What does (hvac) stand for? What do they do?
Definition
 heating, ventilation, and air conditioning.                                      they install, maintain, & repair heating, ventilation, & air conditioning.
Term
 What schooling do the hvac have?
Definition
 on the job training & apprienticeship
Term
 What happens when you put your hand in cold water?
Definition
 heat energy from your hand flows into the water and makes the water warm
Term
 The higher the temp. the _____ an object's ______move
Definition
 faster; particles
Term
 How do thermometers work? heat causes the particles in the thermometer do expand as they expand the  height is then....
Definition
 measured unit the marks of the thermometer
Term
 Define celcius scale.
Definition
 the temperature scale used by scientists and by people in many countries, in which h2o freezes at 0* and boils at 100*
Term
 What are the two formulas we can use?
Definition
 feherenheit- f= 9/5 x c + 32or f= 1.8 x c + 32celcius- c= 5/9 x (f- 32)
Term
 define freezing point
Definition
 a temperture at which liquid changes into a solid
Term
 define melting point
Definition
 the temp. at which a solid changes to a liquid
Term
 how is temp. heat diffrent?
Definition
 temp. is a measure of how fast of molecules in a substance are moving. heat is a form of energy depends on the temp. of a substance and the amount of matter, or mass, the substance has.
Term
 How does a pop up timer work?case contain a plastic stem within a piece of soft metal is a spring. The soft metal is.....
Definition
 solid room temp. when heated to certain temp and the spring.
Term
 Define radiation, conduction, insulation, and convection.
Definition
 radiation- radiant heat (the movement of energy) through a vacuum conduction- the movement of heat energy grom one molecule to the next. insulation- material that doesn't conduct heat well  convection- heat that flows from warm to cold
Term
 What two substances are typlically used in thermometers. a. water and bloodb. mercury and alcohol c. fruit smoothies and milkshakes
Definition
 b. mercury and alcohol
Term
 Why do we use digital thermometers?a. quicker and easier b. they are germless c. they don't make you sick
Definition
 a. quicker and easier
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