A: 30 September 2011  Objective: You will be able to:  convert between scientific and regular notation  convert between units of mass, length and volume.

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Presentation transcript:

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 now II. Scientific notation notes and practice III. Conversion between units notes and practice IV. Exit ticket V. Homework work time?!? Homework: Week 4 Homework pages 1-4 due Tuesday Lab 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 = 8x10 6  = 1.2x10 -4  Integer must be 1≤x<10  Positive exponent: number > 1  Negative exponent: number 0!)

Practice a) 4,500,000 b) 3,950,000,000 c) 230 d) 230. e) f) g)

Convert to regular notation a. 3.4x10 12 b. 5.4x10 -6 c. 1.2x10 3 d. 7.80x10 -2 e. 1.20x10 -8 f. 3.98x10 10 g. 3x10 -2

Copy the number and rewrite in scientific notation or regular notation a. 100,000 b. -5,000,000 c. 450,000,000,000 d. 1,300 e f g h a. 2.3 x10 -2 b x10 4 c. 9 x10 -8 d x e x10 -4 f x10 15

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) 745,000 b) c) 540,321,324 d)

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 QuantityUnitSymbol lengthmeterm massgramg volumeliterL timeseconds

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 PrefixSymbolMeaning kilo-k1000 (meter, liter, gram) centi-c1/100 milli-m1/1000  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 matter Homework: 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 milliliters 1. 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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