The scientific process for studying nature that involves observations, hypotheses, and experiments

This element is added to the "air" in divers' tanks along with oxygen

Type of observation that does not involve a number

A device that scientists have used to produce images of atoms

Another name for a chemical change

The science that deals with the materials of the universe and the changes that these materials undergo

When this animal goes out in search of food it helps identify the locations of hidden land mines by bringing back traces of the explosives

A statement to explain an observation that can be tested and is falsifiable

_______ and _______ are two characteristics of matter

A _________ does not affect the composition of a substance while a ________ causes the substance to become a different substance

Another term for quantitative observation

Graphite, diamond, and buckminsterfullerene are three forms of this element

Another term for a theory

States of matter: ______ is rigid with a fixed shape and volume, ______ has a definite volume but takes shape of container, _______ has no fixed volume or shape

This is the major difference between a mixture and a pure substance

A set of tested hypotheses that gives an overall explanation of some part of nature

Cymbals used by more than 60% of the rock bands in the world were invented by this branch of "chemistry"

A ______ tells what happened; a _______ is an attempt to explain why it happened.

The fundamental unit of which elements are made of

Another name for a solution

A statement that summarizes generally observed behavior

This molecule is often used as an antiseptic and is a corrosive liquid that bleaches fibers, not to be confused with the similarly composed water molecule

A _______ can change as more information becomes available

A substance that contains two or more different types of atoms and always has the same composition

_________ is a separation process that depends on boiling points of substances and _______ is the separation of a solid from a liquid using a filter