By: Mrs. K. Smith
Homework
• Read chapter 1: Be sure to look at
pictures, bold print, italic, margin notes
• Be sure to define the vocabulary on page
26 of your Physics text
• Due tomorrow
Topics of Physics
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Mechanics
Thermodynamics
Vibrations and wave phenomena
Optics
Electromagnetism
Relativity
Quantum Mechanics
Develop a mneumonic to
remember the topics of physics
• Example:
HOMES
This is used to remember the Great Lakes.
Can you name the 5 lakes??????
Huron, Ontario, Michigan, Erie, Superior
Can you identify the topics of physics in
this car?
The Scientific Method
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Observation
Hypothesis
Evaluate
Interpret
Conclusion
Obese Hippos Eat Ice_Cream
Constantly
Numbered Heads Activity
• Left side of desk are # ones, right side are #2
• You have 30 seconds to whisper your partner (s) the
answer
• #1’s List the topics of physics to #2
• #2’s list the steps to the scientific method
CSI Activity
In a group of two or less you will …
1.
Develop a crime scene and story line for CSI
2.
Show how the scientific method is being used in your
crime scene
3.
Create a visual ie: power point, video
4.
Place your video or power point on wiki page/Review
5.
Present your project to the class
6.
Your grade will be based on the rubric.
Scientific Notation
• Scientific Notation is a short hand method of
writing very large or very small numbers
• Keep only one digit to the left of the decimal
Examples:
• 12,300,000,000,000 =
1.23 X 10 13
• 0.000,000,005,6 =
5.6 X 10 -9
Scientific Notation
Operations
Add/ subtraction – exponents must be the same
Multiplication - exponents are added
Division – exponents are subtracted ( top down)
• Need more of a review of scientific notation
Prefixes
• root units : meter liter gram
• Base units are meter, kilogram, second,…
(see table 2 on page 11)
Kilo
K
hecto
H
Deka (root) deci
Da
d
centi
c
milli
m
1000
100
10
1
0.1
0.01
0.001
103
102
101
100
10-1
10-2
10-3
King Henry Doesn’t Mind
Discussing Church Matters
Prefix Activity
• On the strip of paper given fold in half.
• In the middle mark the root units.
• On the left side start with 1018 and mark 18
segments to the middle where the root units are.
• Mark another 18 units to the right to 10-18.
• In the last segment on the left mark 1018 and
exa, mark 1017 in the next and so on.
• After you mark 10 15 mark the prefix peta.
• Continue this until all the powers and prefixes
are marked.
Units
• There are several measuring systems
– English
– Cgs (very small)
– Avoirdupois (ballistics)
– SI
Unit History
• History and practice
Mars Orbiter Mission
• Read the story on page 13.
• Activity
– Determine the distance from your home to
school in miles. Calculate how far short of the
school if you traveled the same number of
kilometers along the same route.
•Quiz time
Counting Sig Figs
– All nonzero numbers are significant as well as zeros
between significant numbers 5087
– (4)
– Zeros in front of nonzero digits are not significant
0.0543
– (3)
– Zeros at the end of a number and also to the right of
the decimal are significant. 67.00
– (4)
– Zeros at the end of the number but to the left of a
decimal are significant if they have been measured or
are the first estimated digit 100.
–3
Significant Figures
• Operations
• Add/Sub – to the least precise digit
40.5 + 5.23 = 45.73 round to
45.7
Mult/ Div - lesser number of sig figs
123 X 5.35 = 658.05 round to
658
Practice Activity
Precision vs Accuracy
• Precision
– The degree of exactness of a measurement
• Accuracy
– A description of how close a measurement is
to the correct or accepted value of the
quantity measured
EXERCISE
• The following students measure the density of a
piece of lead three times. The density of lead is
actually 11.34 g/cm3. Considering all of the
results, which person’s results were accurate?
Which were precise ? Were any both accurate
and precise?
• A. Rachel: 11.32 g/cm3, 11.35 g/cm3, 11.33 g/cm3
– Both accurate and precise
• B. Daniel:
11.43 g/cm3, 11.44 g/cm3, 11.42 g/cm3
– precise
• C. Leah:
11.55 g/cm3, 11.34 g/cm3, 11.04 g/cm3
– neither
Controlled experiments
– An experiment that tests only one factor at a
time by using a comparison of a control group
with an experimental group
• Mousetrap Car Project
Graphing
• Need a review
– General information on graphing
– Graphing for physics (Clemson University)
• Check this site out to see examples of physics labs
at the university level
• Practice Activity
Dimensional Analysis
• Animal worksheet
1 cow X 2pigs X 20 chickens X 2 b peas
1 cow
1pig
1 chicken
X 3 rabbits X 12 pumpkins X 1 turkey
2 b peas
5 rabbits
6 pumpkins
X 3 b apples X 1 b crabs =
• 1 turkey
4 b apples
36 b crabs
Dimensional Analysis
• 88 km X 1000 m X 1 h
= 24 m
h
1 km
3600 s
s
Basic dimensional analysis
Practice Worksheet
Order of Magnitude
• How many leaves does this tree have?
– The leafy part of the tree is sort of a square.
So approximate the volume (L X w X h),
– 10 m X 10 m X 10m = 1 X 103 m3.
– Approx.10 leaves are in one meter and there
are 10 m in each dimension so 100 leaves per
each dimension or 10 X 10 X 10 = 1 X 103
Orders of Magnitude
1 X 103 m3 X
tree
1 X 103 leaves
m3
= 1 X 10 6 leaves
tree
• You are in charge of the Gatorade for the season. How
many containers, powder that make 5 gallons, do you
need?
– Let’s say the team use 3 big 5 gallon containers per half so 6 – 5
gal containers and there are 12 games. If you are in charge of
practice you figure it out like below and then total games and
practices
6- 5 gal containers X 1 powder container X 12 games =
game
5 gal container
season
72 powder containers / season
Order of Magnitude
• Practice Activity
• If you need some more examples of Order
of Magnitude
One More Section
• We are starting the last section so a test is
coming up soon.
• If you haven’t started the Review Sheet
start it now.
Rearranging Equations
• Use the reverse order to rearrange
– sq root then square or Add/ sub or mult/div
• You need m
Y –b = mx
Y–b /x =m
• Practice Activity
• Need another example ?
• Quiz time
Chapter Test
• Be sure to complete the review sheet, read the
chapter, review the vocab, worksheets and this
power point.
• Your test will consist of 20 questions – 60 pt. You
will be tested on theory as well as problems.
Most are multiple choice but there are also
essay questions. You will need a calculator.
• Before the test you will perform a lab. You will be
given two class periods to complete the lab. If
not complete it is homework. After the two lab
days the class will take the test.
Lab Work
• Need help with a vernier caliper