6th
 Please be in your seat ready to go when the bell
rings
 We will start the quiz after a short review
Chapter 1
The Nature of Science
Chapter 1 Vocabulary
 Science
 Volume
 Technology
 Weight
 Scientific theory
 Scientific Notation
 Variable
 Precision
 Mass
 Accuracy
What is the purpose of
science?
•To investigate questions
•To support or refute a theory
•To gain knowledge
Science is a system of
knowledge based on facts or
principles
Technology is the application
of science to meet human needs
Theories & Laws
Theory A
tested, possible
explanation of
a natural event.
Law a
summary of an
observed
natural event
(a repeated
observation
about nature)
*A theory must pass 3 tests:
1.A theory must explain observations
simply & clearly
2. A theory must be repeatable
3. Scientists must be able to predict
from a theory
Qualitative vs. Quantitative
Qualitative
Quantitative
 Describes data using
 Describes data with
words
 Quality
numbers
 Quantity
 Ex. There are many
 Ex. There are 14 cars
red cars in the
parking lot
in the parking lot
The Scientific Method
What is it used
for?
Who can use it?
 State the Question
 Form A Hypothesis
 Test the Hypothesis
 Observe/Collect
Data
 Draw a Conclusion
Experiments
 How many variables are in a typical
experiment?
 How many variables can be tested at
one time?
The main parts of an experiment
Independent Variable
Dependent Variable (result)
Control
Determine the variables in the
experiment
 A botanist is studying the affect of
fertilizer on pea plants.
 She test 5 plants. She adds 6 oz of
fertilizer to plant 1, 7 oz of fertilizer to
plant 2, 8 oz to plant 3, 9 oz to plant 4 and
no fertilizer to plant 5. She waters each of
the plants with 200mL of water everyday
for 2 weeks and places them in the sun for
3 hours each day.
The Metric System
 The International System of Measurement (SI units)
Metric Conversions
K H D B D C M
Practice Problems
550 mm = ________m
1.6 kg = ________g
2800mmol =________mol
Organizing Data
 There are 3 main types of graphs:
 Bar
 Line
 Pie
Scientific Notation
 A value written as a simple number
multiplied by a power of 10.
 Shortcut: If you move the decimal right
the exponent is negative

If you move it to the left the exponent is
positive
Practice
800 000 000 m
0.0015 kg
60 200 L
Using Scientific Notation
 When you multiply, you add the
exponents
 When you divide, you subtract the
exponents
Significant Digits (Figures)
 The digits in a measurement that are known for
certainty.
1.638
1638
1.6