Heat & Light Flashcards
A measure of how hot an object is
temperature
The faster the molecules are moving, the ___________ the temperature
higher
The slower the molecules are moving, the ___________ the temperature
lower
Heat is the energy that’s inside an object because its __________ are moving
molecules
The more ___________ an object has, the more heat energy is has
molecules
Heat is the ________ that’s inside an object because its molecules are moving
energy
The more molecules an object has, the more heat ________ is has
energy
Heat tends to move from _________ objects to _________ objects
hotter - colder
Three ways heat is transferred
conduction, convection, radiation
The transfer of heat that occurs when a warmer object touches a cooler object
conduction
In conduction, the molecules in the cooler object start moving faster and the object gets __________.
warmer
What is an example of conduction?
A frying pan heating up on a stove
When heat moves with air flow
convection
When air is heated it ________. Eventually it ________ and comes back down.
rises - cools
Give an example of convection
lava lamp
The transfer of heat that occurs when an object gives off heat
radiation
In radiation, heat radiates _______ the warm object _______ its surroundings
from - to
Heat radiates from the _______ to the earth
sun
_________ heat radiates into a room, so it’s warmer if you have more people in the room.
Body
What makes good heat conductors because they transfer heat easily?
metal
Good _________ hold in heat because it does not move through them easily.
insulators
Name 3 examples of good insulators
wood, plastic, cloth
When an object heats up, the molecules:
A. slow down and the object contracts.
B. speed up and the object expands.
C. don’t change.
B. speed up and the object expands.
When an object cools, the molecules:
A. slow down and the object contracts.
B. speed up and the object expands.
C. don’t change.
A. slow down and the object contracts.
