Vocacb
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
When a thing gets colder, its molecules are moving slower and have less kinetic energy.
3.
groundwater
water that is underground
4
Temperature is a measure of the average kinetic energy of the molecules of a thing.
Energy isn’t created or destroyed. 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 doesn’t change.
6.
tiny organisms that are made of a single-cell
bacteria
The molecules of a system will transfer energy until the system reaches a stable state known as equilibrium, in which all of the molecules are moving at about the same speed.
7.
pasteurize
to make something safe to eat or drink by heating it
8
For things at the same temperature, the thing with more molecules has more total kinetic energy (thermal energy) than the thing with fewer molecules.
to move from one object to another or one place to another
transfer
when something becomes different over time
change
Things are made of molecules (or other types of atom groups).
1.
water heater
a heating unit that stores and warms water
5
When two things are in contact, their molecules collide, and kinetic energy transfers from the faster‑moving molecules to the slower‑moving molecules.
system
a set of interacting parts forming a complex whole
the moment when two objects hit each other
collision
At equilibrium, the average kinetic energy (temperature) of the molecules in the system is the total kinetic energy (thermal energy) evenly divided by the number of molecules in the system.
9.
molecule
a group of atoms joined together in a particular way
10
When a thing gains or loses energy, the energy gained or lost is divided among all the molecules of the thing.
Things are made of molecules (or other types of atom groups).
1.
the ability to make things move or change
Energy
Energy isn’t created or destroyed. 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 doesn’t change.
6.
stability
when something stays mostly the same over time
2
When a thing gets hotter, its molecules are moving faster and have more kinetic energy.
average
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