a: 30 september 2011
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A: 30 September 2011
Objective: You will be able to: convert between scientific and regular
notation convert between units of mass, length
and volume Do now: What unit do we use to
measure: a. Mass? b. Length? c. Volume?
Agenda
I. Do nowII. Scientific notation notes and practiceIII. Conversion between units notes and
practiceIV. Exit ticketV. Homework work time?!?Homework: Week 4 Homework pages
1-4 due TuesdayLab Notebook due Tuesday
Properties
Intensive: the property does NOT depend on the amount of stuff you have ex: temperature
Extensive: the property DOES depend on the amount of stuff you have ex: mass
Use your data to determine if density is an intensive property or an extensive property!
Scientific Notation
602,000,000,000,000,000,000,000 The number of atoms of iron in this
beaker!
Scientific Notation: A way to effectively show and compare really large or really small numbers.
Scientific Notation
8,000,000 = 8x106
0.00012 = 1.2x10-4
Integer must be 1≤x<10
Positive exponent: number > 1 Negative exponent: number < 1 (but >
0!)
Practice
a) 4,500,000b) 3,950,000,000c) 230d) 230.e) 0.00000045f) -0.002g) 0.00781
Convert to regular notation
a. 3.4x1012
b. 5.4x10-6
c. 1.2x103
d. 7.80x10-2
e. 1.20x10-8
f. 3.98x1010
g. 3x10-2
Copy the number and rewrite in scientific notation or regular notation
a. 100,000b. -5,000,000c. 450,000,000,000d. 1,300e. 0.01f. 0.00 005g. -0.0 045h. 0.00 000 000 000 000 023
a. 2.3 x10-2
b. 1.99 x104
c. 9 x10-8
d. 6.505 x10-12
e. 1.00 x10-4
f. 4.55 x1015
Remember…
A negative exponent is a tiny number but is bigger than 0 (NOT a negative number!)
A big positive exponent is a HUGE number.
A negative number can have either a positive exponent or a negative exponent.
Round to three sig. fig. and express in scientific notation
a) 745,000b) 0.00054000c) 540,321,324d) 0.143589
C: 3 October 2011
Take Out Homework: Week 4 p. 1 Objective: You will be able to:
convert between units of mass, length and volume
Do now: What unit do we use to measure: a. Mass? b. Length? c. Volume?
Agenda
I. Do now (6 min.)II. Homework Check (5)III. SI units and prefixes notes (5)IV. Conversions examples (10)V. Conversions practice problems (10 min.)VI. Go over answers (5 min.)VII. Exit Ticket (10 min.)Homework: Week 4 pages 2-4: due Weds.
Unit Conversions
SI Units for Measurement
Quantity Unit Symbollength meter mmass gram gvolume liter Ltime second s
Unit Prefixes
But what if it’s not practical to use a meter or a liter or a gram?
You want to measure something much smaller or larger?
SI Unit Prefixes
Prefix Symbol Meaningkilo- k 1000(meter, liter, gram)centi- c 1/100milli- m 1/1000 So what does that mean?
1 meter = 100 centimeters 1 kilometer = 1000 meters
Converting between units
Example 1: How many meters are equal to 5 kilometers?
Example 2: How many milliliters are equal to 75.0 liters?
Example 3: How many kilograms are equal to 2,500 grams?
C: 5 October 2011
Take Out Homework: Week 4 p. 2-3 Objective: You will be able to:
convert between units of mass, length and volume
differentiate between physical and chemical properties and changes.
Do now: How many centimeters are equal to 4.50 meters?
Agenda
I. Do now (6 min.)II. Homework Check (5)III. Conversions practice problems (10 min.)IV. Go over answers (5 min.)V. Exit Ticket (10 min.)VI. Chemistry, physical and chemical
changes and states of matterHomework: Week 4 page 4: Thurs.
Week 5 Homework page 1: Thurs.
Homework Check
Practice Problems
1 meter = 100 cm, 1 kilometer = 1000 meters
1. How many meters are equal to 500 centimeters?
2. How many centimeters are equal to 850 meters?
3. How many meters are equal to 37.5 kilometers?
4. How many centimeters are equal to 5.8 kilometers?
Practice Problems
1 liter = 1000 milliliters1. How many liters are equal to 550
milliliters?2. How many milliliters are equal to 3.5
liters?3. How many liters are equal to 45,000
milliliters?4. How many milliliters are equal to 354
liters?
Exit Ticket
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