Vocab 1
the moment when two objects hit each other.
collision
things are made of ...
Molecules
a number that summarizes a set of data and that can be computed by adding all the numbers in a list and then dividing by the number of numbers in the list
average
Energy isn’t created or _______. Therefore, as energy transfers, it increases in one part of the system as it decreases in another part of the system. The total energy of a system ______ change.
1 destroyed 2 doesn't
How many presents does Santa deliver in a night
7 billion
a measure of how hot or cold something is.
temperature
when two things are in contact, their molecules collide, and kinetic energy ______ from faster-moving _____ to the slower moving molecules
1 transfers 2 molecules
water that is underground
groundwater
When a thing gets _____, its molecules are moving _____ and have ___kinetic energy.
1 hotter 2 faster 3 less
the ability to make things move or change
energy
a group of atoms joined together in a particular way
molecule
the molecules of a system will transfer _____ until the system reaches a stable state known as ________, in which all of the molecules are moving at about the same speed
1 energy 2 equilibrium
the total kinetic energy of all the molecules that make up a sample
thermal energy
The molecules of a system will transfer _____ until the system reaches a stable state known as _________, in which all of the molecules are moving at about the same _____
1 energy 2 equilibrium 3 speed
what is Santa's phone number
1-605-313-4000
when something stays mostly the same over time
stability
At equilibrium, the average _____ ______ (temperature) of the molecules in the system is the total kinetic energy (thermal energy) evenly divided by the number of _______ in the system.
1 kinetic energy 2 molecules
tiny organisms that are made of a single-cell
bacteria
When a thing gains or loses _____ the energy gained or lost is _____ among all the molecules of the thing.
1 energy 2 divided
to move from one object to another or one place to another
transfer
a balanced state in which a system is stable such as when two or more samples are at the same temperature.
equilibrium
For things at the same _________, the thing with more molecules has more total ____ ____ (thermal energy) than the thing with fewer molecules.
1 temperature 2 kinetic energy
a small part that is meant to show what the whole is like
sample
Temperature is a _______ of the _______ kinetic energy of the molecules of a ____.
1 measure 2 average 3 thing
how old is santa
1,741 years old!