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## Presentation on theme: "[http://farm3.static.flickr.com/2106/1536243285_eecbf318b4_b.jpg]"— Presentation transcript:

[http://farm3.static.flickr.com/2106/1536243285_eecbf318b4_b.jpg]

Measurements Length Size of an object. English: Foot (ft) SI: Meter (m)

Measurements Mass Amount of matter an object contains. English: Pounds (lb) SI: Grams (g) [http://www.basicsciencesupplies.com/Merchant2/graphics/00000001/320189_WEB.jpg]

[http://genchem.rutgers.edu/bal3b2.gif] 373.35 g

Measurements Temperature Measures the kinetic energy of molecules. English: Fahrenheit (°F) SI: Celsius (°C) [http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter01/Text_Images/FG01_04.JPG]

Measurements Volume The amount of space an object occupies. English: Gallon (gal) SI: Liter (L) [http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter01/Text_Images/FG01_07-19UNPr1-26.JPG]

Measurements Volume is considered a derived unit since it can be calculated using length measurements Volume = l x w x h V = 5m x 3m x 3m V = 45 m 3 [http://www.bgfl.org/bgfl/custom/files_uploaded/img_library/cuboid_5by3by3_with_labels31.jpg]

Unit Conversions The main units can be scaled up or down using prefixes on page 15. Click Here for "Powers of Ten Video"

Unit Conversions Kilo- is 1000 times larger than base. Centi- is 100 times smaller than base. Milli- is 1000 times smaller than base.

Unit Conversions Example: How many millimeters (mm) are there in 2 meters (m)? 2 m1000 mm 1 m = 2000 mm Dimensional Analysis…or “Bridge Problems” Conversion Factor is equal to one!

Unit Conversions Example: How many centimeters are there in 2.5 kilometers? 2.5 km1000 m 1 km = 250000 cm 1 m 100 cm Convert to “Base” Unit 1 st !

Unit Conversions Example: How many kilograms (kg) are there in 100 grams (g)? 100 g1 kg 1000 g = 0.1 kg