**Review Concepts for Physics** 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** • 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** • Observation • Hypothesis • Evaluate • Interpret • Conclusion

**Obese Hippos Eat Ice_Cream Constantly**

**Learning Check** 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 … • Develop a crime scene and story line for CSI • Show how the scientific method is being used in your crime scene • Create a visual ie: power point, video • 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 hecto Deka (root) deci centi milli K H Da d c 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.

**Learning Check** • 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 = 36 b crabs • 1 turkey 4 b apples

**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 103m3 X 1 X 103leaves = 1 X 10 6leaves tree m3 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 ?

**LEARNING CHECK** • Quiz time

**Review Sheet is due**

**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