Measuring Matter

IAN p. 6 & 7 Update ToC – p. 6 “Measuring Matter” p. 7 “Measurement vocabulary” Label p. 7 “Measurement vocabulary” Set up Cornell notes on p. 7 Copy the vocabulary word in the left column, and copy the definition in the right hand column.

Mass vs. Weight Weight – the measure of the force of gravity on you. Mass – the measurement of how much matter is in an object. Unlike weight, an object’s mass will not change if the force of gravity on it changes.

Lose Weight… … by going to the moon! The moon has 1/6 the gravity of Earth. (mass in kg / 6, kg x 2.2 = lbs) That means, if you go to the moon, there is less gravity pulling on you… hence your “weight” decreases! Your mass, however, will stay the same.

Units of Mass International System of Units (SI) SI unit for mass is kilogram (kg) 1 kg = 1,000 grams (g)

Volume Volume – the amount of space that matter occupies. Ex. balloon Common SI – liters (L), milliliters (mL), cubic centimeters (cm3) Volume = Length x Width x Height ex. 3 cm x 3 cm x 12 cm = 108 cm3

Density Density is a physical property of matter. Density will break your heart! Density = Mass / Volume

Pop Quiz Why is mass more useful than weight for measuring matter? What two quantities do you need to know in order to calculate density? Describe how you could measure the volume of an object with an irregular shape. The density of aluminum (Al) is 2.7 g/cm3. A metal sample has a mass of 52.0 g, and a volume of 17.1 cm3. Could the sample be aluminum? Explain your answer.

Measuring Matter Label p.6 “Measuring Matter” Using the top half of the page, compare and contrast MASS and WEIGHT. Be sure to include moon conversion! On the bottom half of the page, glue a four barn door foldable on your page.

Measurement Foldable On flap one, draw something you would use to measure mass. Inside the flap, write “mass” and what units you would use when you record a mass. Repeat this for the other flaps. Use “volume” for flap two, “temperature” for flap three, and “length” for flap four.