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Word
Substance
Element
Compound
Heterogeneous
mixture
Definition and Example
Type of matter with a fixed
composition; can be element or
compound
Ex: He, water, salt
Substance made up of atoms
that are all alike
Ex: graphite in pencil point
Substance in which the atoms of
2 or more elements are
chemically combined in a fixed
proportion
Ex: water
Mixture in which different
materials remain distinct
Ex: Salad, oil and vinegar
dressing
Suspension
A heterogeneous mixture made
of a liquid and solid particles
that settle
Ex: River deltas, seasoning in
salad dressing
Colloid
A heterogeneous mixture with
particles that never settle
Ex: milk (water, fats, proteins),
fog (liquid suspended in air)
Tyndall effect
Scattering of light as it passes
through a colloid
Key
1: Understand and can explain
2: Understand, but can't
explain
3: Fuzzy
4: Don't know
Before
After
After
After
Reading
Reading
Discussion
Experiment
or
Observation
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Word
Definition and Example
Homogeneous
mixture
A mixture that remains
constantly and uniformly mixed
and has particles that are so
small that they cannot be seen
with a microscope
Ex: soft drink in sealed bottle
Solution
Same thing as a homogeneous
mixture
Ex: tea, vinegar, brass steel
alloys
Physical
property
Any characteristic that you can
observe without changing the
identity of a substance
Ex: color, shape, size, density
Physical
change
A change in size, shape, or state
of matter in which the identity of
the substance remains the same
Ex: can change states; color
Distillation
Chemical
property
Process of separating
substances in a mixture by
evaporating a liquid and
recondensing its vapor
Ex: separate 2 liquids with
different boiling points
Any characteristic of a material
that you can observe that
produces one or more new
substances
Ex: flammability
Key
1: Understand and can explain
2: Understand, but can't
explain
3: Fuzzy
4: Don't know
Before
After
After
After
Reading
Reading
Discussion
Experiment
or
Observation
._.
.-
Word
Chemical
change
Law of
Conservation
of Mass
Definition and Example
A change of one substance to
another
Ex: baking soda and vinegar
total mass of the reactants =
total mass of the products
Key
1: Understand and can explain
2: Understand, but can't explain
3: Fuzzy
4: Don't know
Before
After
After
After
Reading
Reading
Discussion
Experiment
or
Observation
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