1. Physical Science Review #1
Lecture
* You might want to take your own notes if you have lost your own

2. Test Format Regular Physical Science 60 multiple Choice
~40 concept questions
~20 math questions
Honors Physical Science
70 multiple choice
45 concept
25 math

3. Scientific Method
Not a set series of steps because you can always go back if a step doesn’t work
All experiments include:
Problem
Background research
Hypothesis
Procedure
Data
Results
Analyzing
Conclusions
Report

4. Hypothesis vs Theory vs Law
an educated guess based on background research
Able to be disproven but not proven
Theory
A hypothesis that has been tested many times
Tells WHY something happens
Law
Tells you what will happen because of a theory

5. Independent vs Dependent Variables
Independent variable
What you manipulate in the experiment
(ex. The time)
Dependent variable
What you measure in response to the independent variable
Depends on Independent Variable
(ex. The temperature)
Constant/Control
What stays the same (the amount of ice)

6. Accuracy vs Precision Accuracy Precision How correct your answer is
How many times you can repeat the same measurement

7. Metric System Gram Liter Meter 103 102 101 100 10-1 10-2 10-3 kilo-
hecta-
deka-
BASE
deci-
centi-
milli-

8. King Hector Died By Drinking Chocolate Milk

9. Examples 350 kg __________g 0.448 g____________cg 2356 mm___________m
275 dL_____________mL
150 dag______________hg

10. Scientific Notation To convert: __.__ ___ x 10
If the number is greater than 1; positive exponent
If the number is less than 1; negative exponent.
Move from the decimal (or from the far right if there isn’t one)

11. Examples 35000 __________ 0.00448 ____________ 2356 ___________
_____________
______________

12. Standard Form
If the exponent is positive move that many times to the right from the decimal
If the exponent is negative move that many times to the left from the decimal

13. Examples
3.75 x 105
8.29 x 103
5.91 x 10-2
3.25 x 10-4
4.78 x 101

14. Dimensional Analysis & Train Tracks
Always make your train track first
Always start with what’s given in the problem
Use your conversion factors to help get where you need to go
Multiple all the top, divide by all the bottom

15. Examples Convert 195 inches into centimeters (1 in=2.54 cm)
Convert 476 minutes into seconds (1 minute=60 seconds)
Convert 85 feet into meters (1 ft=12 in, 1 in=2.54 cm)