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Chapter 6 - Heat

a data set by jaynekleckler
created December 19, 2016
Vocabulary WordDefinitionDefinition 2Definition 3
heatA form of energy that results from the motion of particles in matter.
heat sourceA place from which heat energy comes.
heat energyFlows from a warmer object to a cooler object.
sunEarth's most important heat source.
FrictionA form of mechanical energy that produces heat.
heatCauses particles to move faster and move farther apart.Can change matter from one state to another.Depends on the temperature of a substance and the amount of matter, or mass, the substance has.
Temperature and HeatIf two objects of different mass are at the same temperature, the object with the greater mass will give off more heat.
evaporateTo change from a liquid to a gas.
meltingHeat speeds up the moving molecules and they move apart and the solid changes to a liquid.
expanding matterHeat causes particles in matter to puch each other farther apart so it takes up more space.
solids, liquids and gasesDo not expand equally.
LiquidsExpand more than solids.
GasesUsually expand the most.
contracting matterParticles in matter move more slowly and stay closer together as they lose heat and takes up less space.
temperatureMeasures how fast an object's particles are moving.
thermometerA measuring instrument used to measure temperature.A glass tube with small amount of liquid that expands or contracts depending on the temperature.
VacuumA space that has no matter.
Fahrenheit ScaleThe temperature scale commonly used in the U.S. in which water freezes at 32° and boils at 212°.
Celsius ScaleThe metric temperature scale used by scientists and by people in most countries, in which water freezes at 0° and boils at 100°.
degreeA unit of measurement on a temperature scale.
Freezing pointThe temperature at which a liquid changes to a solid.
Melting pointThe temperature at which a solid changes to a liquid.
Boiling pointThe temperature at which it changes from a liquid to a gas.
ScientistsUse the freezing and boiling points of substances to help identify unkown substances.
RadiationMoves energy by traveling from particle to particle.
ConductionThe movement of heat energy from one molecule to the next.
ConductorA substance that allows heat energy to flow through it easily.gold, aluminum, copper, silver, metals, and tin
InsulatorA material that does not conduct heat well.glass, wood, sand, soil, Styrofoam and air.
ConvectionA method of heat movement that happens when the particles of a gas or a liquid rise. As they rise, they carry heat.
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