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Unit 1 – Study Guide
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Section 1 – Key Terms and Concepts
scientific method
hypothesis
scientific law
theory
mixture
homogeneous mixture
heterogeneous mixture
element
pure substance
compound
precision
accuracy
Section 2 – Mathematical Concepts
Fractions
(
notation, multiplying, rules for cancelling units
)
This is a
notation
used to represent a part of a whole number.
For example, If a whole pizza has 4
slices and you have eaten 2 of these 4 slices, you have eaten half
the pizza.
A fraction is also another way of writing a division problem.
For example,
can be read as
“two fourths”
or
“two divided by four”
Therefore,
Similarly, any number divided by itself is equal to one.
Any whole number not written in fraction form can be written over 1.
There are a couple approaches used when
multiplying fractions
.
I feel this is the most simple.
Step 1:
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 Spring '11
 Bassa
 Chemistry, Work

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