|
 |
|
| the
basic building blocks of matter. Atoms cannot be
chemically subdivided. |
|
 boiling
point |
the temperature at which a liquid becomes a gas. This happens when energy is added and liquid is heated. |
|
chemical
property
|
one
property that defines matter. An example of chemical
properties is the way elements combine with each other such as the formation
of rust (iron oxide), which is produced when oxygen in the air reacts
with iron. |
| to press
or squeeze together |
|
|
the phase change
that occurs when vapor, or gas, cools and changes
to liquid . Condense is the opposite of evaporate. |
|
|
condensation
point
|
 the
temperature at which a gas becomes a liquid. This happens when energy
is removed and gas is cooled. |
| a physical
property. Density is the mass of a substance per unit volume.
Density
|
|
| element | substances
that cannot be separated into simpler substances. |
|
basic property defined as the capacity to do work. Energy in the form
of heat is needed to change from one phase to another. The basic forms
of energy includeelectrical, chemical, mechanical, nuclear and radiant
(light). |
|
|
the phase change
that occurs when a liquid's atoms or molecules gain enough energy to
change to a gas. Heat makes water evaporate faster. Evaporation
|
|
 freezing
point |
the
temperature at which a liquid becomes a solid. This happens when energy
is removed and a liquid is cooled. |
| one state,
or phase, of matter. A gas is easy to compress, spreads out evenly to
fill out a container of any size and shape, and it's atoms have more energy
than liquids or solids. |
|
| one
state, or phase, of matter that exists between the solid phase and gas
phase. A liquid is hard to compress, takes the shape of the part of the
container it is in, and its atoms have more energy than a solid but less
than a gas. |
|
| is how
much there is of an object. |
|
| anything
that takes up space and has mass. Matter can change in two major ways,
physically and chemically.
|
|
|
melting
point
|
the temperature
at which a solid becomes a liquid. This happens when a solid is heated
and energy is added. |
 molecule |
the smallest part of a substance formed by the chemical bonding of two
or more atoms and that still retains its chemical composition and properties.
|
| a physical
condition or stage of matter. Another word for phase is "state". |
|
|
physical
properties
|
the part of an object
that can be experienced using one of the five human senses: sight, sound,
touch, taste or smell or, detected through any measuring tool. |
|
plasma
|
considered
a 4th "state of matter. Plasma is a lot like gas but is made up of
free electrons and ions. Electricity (a form of energy) flowing through
the gas in a neon sign, or a fluorescent light make plasma in those lights. |
| pressure | is
the measure of force that acts on a unit area |
| describes
how an object looks, feels, or acts |
|
| one
state, or phase, of matter that is hard to compress,
holds a shape, has a certain size, and might be hard. Atoms in solids
don't move very much. |
|
|
a physical condition
or stage of matter. Another word for state is "phase." State
|
|
| another
word for gas. Vapor is the word used to describe gases that are usually
found as liquids, such as water. |
|
|
the amount of space an object occupies. Volume
|
|
