1. An Introduction to Matter Measuring Matter Chapter 1 Section 2

2. Mass U.S. uses… –Pounds –Ounces –Tons International System –SI Units Grams –Kilogram (1,000 g) –milligram (0.001 g) –Water 1 mL = 1 g

3. Weight or Mass??? Weight –The force of gravity pulling down on you Would be less on the moon Mass –The amount of matter in an object Never changes

4. Volume U.S. uses… –Fluid Ounces –Pints –Quarts –Gallons International System –SI Units Liters –kiloliters (1,000 L) –milliliters (0.001 L) Cubic Centimeters –1 cm x 1 cm x 1 cm »1 cm 3 1 cm 3 = 1 mL

5. Density Equals Mass/Volume –Water 1 g/mL Oil & water have different densities

6. Practice Problem If a metal sample has a a mass of 35 grams and a volume of 5 mL, what is the object’s density?