Mr. Shepherd’s Physical Science Class
Name:___________________
Class: ___________________
Chapter 17: _______________________________________________
Section 1: _______________________________________________
Materials
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MATERIALS ARE MADE OF A ____________________ OR A
_______________________________________.
A _________________________, or simply a substance, is either an element ( iron or
silver) or a compound (NaCl, H2O)
Substances __________________________ be broken down into simpler compounds and
still maintain the properties of the original substances.
Substances
All substances are built from ______________________.
If all the atoms in a substance are alike, that substance is an ___________________.
(Ex.’s--graphite in pencil—all ________________________ atoms; copper coating in
pennies—all ___________________ atoms; gold bar—all ____________________)
Compounds
2 or more elements can combine to form substances called _______________________.
A _____________________________ is a substance in which the atoms of 2 or more
elements are combined.
(Ex. Water=H2O—2 atoms of hydrogen, 1 atom of oxygen.
Mixtures
A mixture that can be distinguished easily is called a __________________
__________________________.
________________________—are mixtures made of 2 or more substances that can be
easily separated by physical means.
(Ex. Bowl of mixed nuts)
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Heterogeneous Mixture
You might be wearing another heterogeneous mixture…________________________
__________________ contain fibers of 2 materials (POLYESTER AND COTTON)
MOST OF THE SUBSTANCES YOU COME INTO CONTACT WITH EVERY DAY
ARE ____________________________________.
Some are easy to see, like the ingredients in a _____________________________, but
others are not.
In fact, the component you see can be a mixture itself.
(Ex. CHEESE--contains milk, proteins, butter fat, colorings, and other food additives.)
Homogeneous Mixture
A _______________________________ contains 2 or more gaseous, liquid, or solid
substances blended evenly throughout.
Ex. ________________________________: water, sugar, flavoring, coloring, and
carbon dioxide gas—can/flat—NOT OPEN)
Another name for a homogenous mixture is called a _____________________________.
A __________________ particle are so small that they cannot be seen with a microscope
and will NEVER settle to the bottom of their container.
Colloids
A ________________________ is a type of mixture that never settles.
Its particles are larger than those in solutions, but NOT heavy enough to settle.
(Ex. Milk, fog, smoke)
DETECTING COLLOIDS—You can tell for certain if a liquid is a colloid by passing a
beam of light through it.
A light beam is INVISIBLE as it passes through a _____________________, BUT can
be SEEN as it passes through a _________________________________.
The particles in a ___________________________________ are LARGE enough to
SCATTER light, but those in a ____________________________________ are NOT.
The SCATTERING OF LIGHT by colloidal particles is called the
_______________________.
Suspensions
Some mixtures of neither solutions nor colloids.
(Ex. MUDDY pond water, apple CIDER (NOT juice)
POND WATER is a _________________________________________, which is a
_________________________________ containing a liquid in which visible particles
SETTLE.
Other examples--orange juice with pulp, liquid medicines