Passed out hard copies of homework packet that will be due Aug 27 when we have our first quiz.
Looked over Canvas site and explained why things were challenging to download for students.
Spent 5 minutes practicing using calculator while multiplying measurements in scientific notation.
Reviewed significant figure rules
Learning Obectives:
Express a large number or a small number in scientific notation.
Carry out arithmetical operations and express the final answer in scientific notation
Identify the number of significant figures in a reported value.
Introduced DIMENSIONAL ANALYSIS
Represent equalities as conversion factors.
Worked "simple math" of chemistry calculating area and volumes.
Then we practiced changing squared and cubed units.
Got up to thermometer pics in the presentation (slide #60).
Be sure to review metric prefixes
M
Mega
1000000x
106
million
K
Kilo
1000x
103
thousand
Da
Deka
10x
101
ten
base
1x
100
one
d
deci-
0.1x
10-1
one tenth
c
centi-
0.01x
10-2
one-hundredth
m
milli-
0.001x
10-3
one-thousandth
m
micro-
0.000001x
10-6
one-millionth
n
nano-
0.000000001x
10-9
one-billionth
You are responsible to know these prefixes for the school
year:
Additionally,
1 cm3 = 1 mL = 1 cc
1 dm3 = 1 L
Conversion Factors
Practice solving dimensional analysis problems using
conversion factors.
Teach significant figures and rules for addition and subtraction.
Additional (optional videos) if you need further explanation.