Metric System Measurement Bell Ringer The Metric Conversion

Metric System Measurement

Bell Ringer • The Metric Conversion Act of 1975 determined that the metric system would be the system of measurement used for US Trade & Commerce. Why do you believe this act was passed?

History of the Metric System • After the French Revolution, Louis XVI put a group of scientists to create a unified system of measurement. • The SI System gives credit to the French because it stands for “Systeme International d’unites” http: //www. youtube. com/watch? v=Cey. GEwj. LPGw&feature=related • http: //www. youtube. com/watch? v=DQPQ_q 59 xyw&feature=related

Length • Length is the distance between 2 objects • A meter stick measures length • 1 meter = 100 cm or 1 meter = 1, 000 mm • Practice Problems • 10 cm= ____ mm 5. 5 mm= _____ m

Mass Amount of matter in an object Mass is measured with a triple beam balance Grams is the basic unit of mass Weight is not Mass because weight is affected by gravity. • Practice Problem: 1500 g = ____ kg • •

Volume • Is the amount of space an object occupies • If it’s a solid = cm 3. If it’s a liquid= m. L • Solid= Calculate Lx. Wx. H • Liquid= Grad. Cylinder

Density • Heaviness of objects. Compare a rock to a crumbled piece of paper. The rock is more dense than the paper. • Formula for Density = Mass/Volume • Practice Problem: Calculate the density in g/m. L of aluminum if a 50 m. L block weighs 135 g.

Temperature • Measure of the average kinetic energy of the particles in a sample of matter • Measured in Celsius, Use a thermometer • Therm= heat, meter= measure • Convert 75 degrees Fahrenheit to Celsius » 5/9(degrees in Fahrenheit – 32)

Temperature conversion formulas • Fahrenheit to celcius = • 5/9(degrees in Fahrenheit – 32) • Celsius to Kelvin = • Degrees in Celsius + 273. 15

Temperature • Celsius to Fahrenheit: • Kelvin to Celsius: C= K- 273. 15

Conversion Factor • • • Start with what’s given Find a conversion factor Numerator (unit that matches answer) Denominator (unit that matches given #) Multiply Across and then divide