September 14th, 2015
In 1716, Boston Light, the first lighthouse in America was first
lighted just before sunset. Located on Little Brewster Island to
mark the entrance to Boston, Massachusetts, harbor, has guided
ships since then. Building it was authorized 23 Jul 1715 by the
Boston Light Bill. In the 1600s, treacherous rocks caused
countless loss of lives. False signal fires lit in the wrong places
by “wreckers” lured ships aground to plunder. Boston Light was
blown up by the British in 1776, but rebuilt in 1783 by
Governor John Hancock. The lighthouse is also the last
remaining manned station in the U.S.
Objectives
• Complete lab safety quiz
• Complete lab equipment quiz
• Discuss Classification of Matter
September 14th, 2015
Assessment Expectations!
• Remain quiet during and after your assessment.
• Remain seated. Turn your assessment over when
finished. I will pick them up at the end of class.
• Remain busy. Find something else to work on.
Lab Equipment Quiz
• I will dismiss a column at a time. If you are
finished with the other parts of the quiz please wait
patiently until it is your turn to take the quiz.
Anything that has mass and
takes up space.
Mass is the quantity of
matter.
Volume is the amount of
space the matter occupies.
All atoms are matter and all
matter is made up of atoms.
Building blocks of the
universe.
Trillions upon trillions upon
trillions upon trillions…of atoms,
but currently only about 115
different types of atoms.
Formed when two or more
atoms chemically combine.
Oxygen gas (O2), hydrogen
gas (H2), water (H2O), and
carbon dioxide (CO2)
Substances made of the same element,
yet have different physical and chemical
structures.
Oxygen can exist as oxygen
gas (O2) and ozone (O3).
Carbon exists in many different forms
such as graphite, diamonds, and
fullerene (aka Carbon 60 or
Buckyballs).
Formed when two or more ELEMENTS
chemically combine.
Water (H2O), carbon dioxide (CO2)
Think of a compound sentence – you
need two complete simple sentences to
make it work and the sentences have to
be different.
In your notebook:
Create a Venn diagram
showing the relationship
between molecules and
compounds.
Has an unchanging set of properties.
Constant, defined composition – anything that
is the exact or same throughout.
Cannot be separated into simpler substances by
physical means.
Elements and compounds are pure substances.
September 15th, 2015
In 1917, the term "bacteriophage" ("eater of
bacteria") was coined in a note from Dr. Félix
d'Hérelle to the French Academy of Sciences.
Objectives
• Finish Classification of Matter (PP)
• Complete classification of matter (WS)
Compounds are chemically
combined in a way that neither
of their individual properties are
retained
Elements are a specific type of
atom and that atom cannot be
broken down further and still be
that specific element.
Made of one type of atom
Found on the Periodic Table
Currently 118 known
elements
Made of MORE THAN 1
type of atom
Can be decomposed or
broken down into elements
only by chemical means
Two or more substances
(elements or compounds) are
added together, but not
chemically combined.
Water – oxygen and hydrogen are chemically
combined, which means that neither of them
display their individual properties anymore, they
are a new substance.
Salt water is a mixture made up of water (pure
substance) and sodium chloride (pure substance).
But the water is wet and if you drink it, it tastes
like salt. Salt water does not take on new
properties.
Mixtures can be mixed in different proportions,
but pure substances cannot.
For example, water always combines in the ratio
of 2 hydrogens and 1 oxygen. It is called the Law
of Definite Proportions.
Mixtures, however, can be made of 95% water and
5% salt, or 60% water and 40% salt, etc.
The same composition
of elements or
compounds throughout;
the particles are evenly
distributed throughout.
Examples:
Salt water
Kool-Aid (sugar water)
Alloys (mixing two or more
metals together)
Not the same throughout;
has different regions or areas
with different compositions
and properties.
SOLUTE – Dissolved material
SOLVENT – Dissolving material
Assignment
• Work with your 4 o’clock partner and
complete “substance or mixture” worksheet
• Suggested reading: section 3.1 pages 48-55
in textbook.
• Read “The Disappearing Spoon”