p. 15, 1. What does SI stand for (not French phrase)? International System of Units p. 16, 2, The SI is based on the _______ system and uses ______ basic units. Metric, seven p. 16, what does the following equation mean and calculate? A = l x w Length times width equals area

Today’s Objectives: S.W.B.A.T. Discuss measurement of length used in the

USA Measure length in centimeters and

millimeters Understand the measurements of volume

used in the USA Understand the metric system is based on 10 Understand the prefixes: milli, centi, kilo

Activity: Finish lab Review over homework back page – controls

and variables Notes and discussion What’s the title measurement handout

Chapter 1

In the USA we have two methods of measurement.

World wide system measurement is the International System of Units (SI) or metric system in which the number 10 is the base unit. All science measurements are based in SI units.

Measuring length – “yard & meter stick” English System – inches, feet, yards, miles 12 inches = 1 foot 3 feet = 1 yard 5280 feet or 1760 yards = 1 mile

“USA”

Metric System – millimeters, centimeters, meter, kilometer.

10 millimeters = 1 centimeter 1000 millimeters = 1 meter 100 centimeters = 1 meter 1000 meters = 1 kilometer

“milli” means one thousandth 1/1000 “centi” means one hundredth 1/100 “kilo” means one thousand 1000

mega – million : symbol M = 1,000,000 giga – billion : symbol G = 1,000,000,000 tera – trillion : symbol T = 1,000,000,000,000 micro – millionth - symbol : = .000001 nano – billionth - symbol n = .000000001

Measuring volume: the amount of space something takes up. “liquids”

English system: ounces, pints, quarts, and gallons.

16 oz. = 1 pint 2 pint = 1 quart 4 quarts = 1 gallon

Metric System – milliliters, centiliters, liter, kiloliter

10 millilters = centiliter 100 centiliters = liter 1000 millilters = liter 1000 liters = kiloliter

1. 10 millimeters = 1 _____________ centimeter 2. The basic unit of volume for liquids in the SI system is ________ or _________ milliliter or liter

Mass is the amount of matter an object contains.

We measure mass by using a balance with standard weight units.

Weight - is a measure of the

gravitational force on a mass.

English System: ounces, pounds, tons

16 oz. = 1 pound 2000 lbs. = ton

Metric System – milligram, centigram, gram, kilogram

10 g = 1 centigram 1000 mg = gram 1000 g = 1 kilogram

http://www.google.com/imgres?imgurl=http://www.scrollonline.net/wp-content/uploads/2009/12/Weights.jpg&imgrefurl=http://365daytriathlon.com/2010/06/30/wait-you-mean-weights/&usg=__wfzbk82mrfq0j2zaBdpRZHpGysI=&h=617&w=800&sz=507&hl=en&start=5&zoom=1&um=1&itbs=1&tbnid=gpsHGBTDHYeNxM:&tbnh=110&tbnw=143&prev=/images?q=weights&um=1&hl=en&safe=active&sa=G&rls=com.microsoft:en-US&rlz=1I7ADRA_en&tbs=isch:1

English system – Fahrenheit scale For water 32˚F freezing 212˚F boiling Average body temperature is 98.6˚F

Metric System – Celsius and Kelvin Scales

For water 0˚C freezing 100˚C boiling Average body temperature is 37˚C To change from Celsius to Kelvin, add

273 Freezing = 273K, boiling 373K

Students will be able to… Define volume and density Explain how to measure the volume of

various objects.

Calculating Volume (amount of space of an object)

Volume of a box = length x width x height

Important Note: 1 cubic centimeter (cm3 or cc) in the

metric system = 1 millimeter (ml) of water .

and 1 millimeter (ml) 1 cubic centimeter of

water = 1 gram(g) in weight.

It is possible in the metric system to weigh a tank of water by measuring it with a meter stick!

Volume of an irregular object? (such as a rock?)

Use the displacement method! There are 2 Ways

Archimedes

A. Use a beaker or graduated cylinder. The difference in the change of water level after drop object is the Volume

B. Use overflow can, drop object into can and catch all water from spout in graduated cylinder. Volume is the amount of water that flowed out.

Density – “important property of matter”

Defined – as a measure of the amount of matter (mass) that occupies a particular space (volume)

If a lot of matter is held contained in a small area it is said to have a high density (gold, lead, mercury)

The equation for density is Density = Mass ÷ Volume D=m/v

The (SI) metric units are expressed in gm/cm3

Water has a density of 1 gm/cm3

Density numbers that are greater than 1 sink; lower than 1 float.

1. Follow teacher’s directions (read/ask before doing)

2. Report any accident or injury to teacher.

3. Wear proper safety equipment. (goggles, gloves)

4. Stay at assigned lab station. 5. Turn off any equipment and clean up

lab area when finished.