Elements and Compounds
Picture Vocabulary
Atmosphere
The layer of gas
surrounding a planet
that is held in place by
gravity
Atom
The smallest
particle of an
element; made of
electrons, protons,
and neutrons
Biosphere
The sum of all
living matter on
Earth
Compound
A new substance
with unique chemical
and physical
properties formed
when two or more
elements are
chemically bonded
during a chemical
reaction
Element
A pure substance composed of the same type of
atom throughout
Hydrosphere
All the water on
Earth’s surface;
includes all water
sources above and
below the surface
Lithosphere
The cool, rigid, outermost layer of Earth that consists
of the crust and the uppermost part of the mantle;
broken into pieces or segments called plates
Mass
A measure of how much matter is present in a
substance
Matter
Anything that has volume and mass
Mixture
A combination of two
or more substances
that do not chemically
combine and can be
separated
Periodic Table of Elements
A table in which all the known elements are
arranged by properties and are represented by
chemical symbols
Properties
Physical and chemical characteristics of matter
used to describe or identify a substance
Volume
A measure of the space that matter occupies