dowlen
average
a number that summarizes a set of data
bacteria
tiny organisms that are made of a single cell
change
when something becomes differnt over time
collision
the moment when two objects hit each other
energy
the ability to make things move or change
equilibrium
when two or more samples are at the same temperature
groundwater
water that is underground
infer
to reach a conclusion using evidence and reasoning
kinetic energy
the energy that an object has because it is moving
matter
anything that has mass and takes up space
molecule
a group of atoms joined together in a particular way
pasteurize
to make somethinf safe to eat or drink by heating it
sample
a small part that is meant to show what the whole is like
stability
when something stays mostly the same over time
system
a set of interacting parts forming a complex whole
temerature
a measure of how hot or cold something is
thermal energy
the total kinetic energy of all the molecules that makes up a sample
transfer
to move one object to another
water heater
a heating unit that stores and warms water