september 4 th and 6 th when we multiply one unit by another, we leave a short _____________ b/w...

Warm Up #4 Sept. 4th

Units of Measurement-DAY 1

September 4th and 6th

Convert…

International System Units

Derived Units

• When we multiply one unit by another, we leave a short _____________ b/w unit symbols.

• When we divide one unit by another, we use an _____________ ________ or a negative index.

Example 1

Density is defined as mass per unit volume. Write the SI unit for density

Example 2

A Newton is defined as the force which accelerates a mass of 1 kilogram at the rate of 1 meter per second per second. Write down the combination of SI units which defines a Newton.

Other units…

Other units…• Smaller or larger multiples of these units are

obtained by combining the base unit with a prefix chosen from a progression of powers of 10. Most commonly…

Know this!

• When stating the value of measurement, the prefix chosen should give the value as a number between 0.1 and 1,000

Example 3

One nautical mile is written as1.852 km (kilometers)

---NOT ---1852 meters

This is OVER 1,000

Things to know…

• The SI does not allow the use of other units. Imperial units of measurement, as used in the U.S. for example, are NOT acceptable in the international system.

Conversions….

Length

Example 4

Convert 3540 millimeters into meters

Example 5

Convert 258 inches into centimeters

Example 6

Convert 15 knots into kilometers per hour

Example 7

Convert 54 kWh into MJ

Mass

Example 9 Example 10

TIME

Example 8

• Convert 4 hours and 12 minutes into seconds

Temperature

Example 11 Example 12

Homework – Due in two class periods!

• Pg. 74 #1-8• Pg. 66 #1-4• Pg. 69 #1-4• Pg. 86-87 #1-7

Warm Up #5 Sept. 9th

A short lesson on accuracy….

• When we take measurements we are usually reading some sort of scale.

• When we measure the length of an object, it is likely to fall between two divisions. So when we estimate our answer to the nearest millimeter, we may be inaccurate by up to half a millimeter.

Examples

Station Posters

• One in HEIGHT, WEIGHT, TEMPERATURE, and CAPACITY

• Each group member should be represented on the poster with ALL calculations for EACH

STATIONS

Find your height in…

InchesFeetCentimetersMeters

Find your weight in…

OuncesPoundsGramsKilograms

STATIONSFind the temperature of these items in F and C…

Water Boiling PointFreezing PointHuman Body

TemperatureDog Body TemperatureTemperature of the NC

beach oceanTemperature outside

today

Find the capacity of the 4 items in…

MilliliterLiter QuartGallon

Homework

• Pg. 74 #1-8• Pg. 66 #1-4• Pg. 69 #1-4• Pg. 86-87 #1-7

• DUE NEXT CLASS!