Presentation on theme: "DO NOW: HOW COULD YOU FIND THE VOLUME OF A ROCK? October 10, 2013 Left side page."— Presentation transcript:
DO NOW: HOW COULD YOU FIND THE VOLUME OF A ROCK? October 10, 2013 Left side page
WATER DISPLACEMENT A procedure to find the volume of an irregularly shaped object. 1. Fill a graduated cylinder with water, about half way. 2. Gently slide the object into the graduated cylinder. 3. Observe the final volume of the graduated cylinder and subtract from the initial volume.
MEASURING MATTER Mass – describes the amount of matter in an object. Mass will be measured with an electronic scale. Volume – describes the amount of space an object occupies. The units of volume most commonly used cubic centimeters and milliliters. 1cm 3 = 1mL
Mean – the average of a set of numbers. Total all of the numbers and divide by the number of sets. Median – the middle number of a set, put all of the numbers in numerical order and find the number in the middle. 1, 2, 5, 8, 10, 12, 13 Mode – this is the most frequent number in a set of data 3, 4, 4, 5, 6
DO NOW: ILLUSTRATE THE STEPS YOU NEED TO TAKE TO FIND THE VOLUME OF AN IRREGULAR SOLID October 15, 2013 Left Side Page Use colored pencils!
DO NOW: Observe the graduated cylinder on my desk. Write three observations and one inference Left Side Page October 15, 2013
DENSITY NOTES Density - The amount of matter in a given volume You cannot measure density directly Formula for density: D=M/V Formula for volume: V= M/D Formula for mass: M = V x D Ending unit for density: g/cm 3
CHARACTERISTIC PROPERTY The density of a substance is a characteristic of that substance. Therefore, density is a property that can be used to help identify a substance.
DO NOW: 1. If a block of copper measures 2.00cm x 4.00cm x 5.00cm and weighs 356 grams, what is its density? 2. A student pipettes 5.00mL of ethanol alcohol into a flask weighing 15.25grams. She finds that the mass of the flask plus the ethanol = 19.17grams. Calculate the density of the ethanol alcohol.