A. Define
Physics-
Equilibrium-
B. Scientific Methods – the Big Lie - these methods allow us to say "This is what we think is true, based on current information."
1. Problem, usually stated as a question
2. Hypothesis- an educated guess, that can be tested
3. Experiment
4. Theory- an explanation that has been tested
- - - - - - - - - - -
Law-
C. Experimental Design
Independent variable-
Dependent variable-
Control Group-
Bias-
D. Units- a noun that follows a number to explain a measurement
meter --> distance
meters squared --> Area
Liter = dm3 -->Volume
second --> time
gram = mass of 1mL of water
Define: Length, Area, Volume, mass
Compare/contrast mass and volume
List comparing English and SI units...
E. Affixes
(see "The Chart")
F. Measuring
1. Issues to consider before you start measuring
Concept:
Units:
Scale
Smallest amount that can be measured:
Largest amount that can be measured:
Increment:
Precision:
2. Issues to consider while measuring
Parallax
Meniscus
“Burning an inch”
Estimation
3. Measuring Mindset
a. Measure and record the "at least"
b. Estimate 1 more digit
c. Record correct units
G. Conversions
4/4 = 1
25 X 1 = 25
...
H. Metric Conversions ...
I. Scientific Notation
1.Rules
always write number with one digit to the left of the period
if num >= 10, exp is positive
if num <1, exp is negative
if 1>= num <10, exp is 0
-------------------------------------
if exp is positive, move decimal to right
if exp is negative, move decimal to left
2.Examples
J. Significant Digits (sig fig)
1)Precision vs. Accuracy
2)The measuring device determines the precision of the measurement.
3)Measurements must make sense for that given situation
Examples: 55mph, 45.5mL, 45.63cm, 12.5N
K. Problem Solving strategy