# DO NOW: HOW COULD YOU FIND THE VOLUME OF A ROCK? October 10, 2013 Left side page.

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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

FORMULA CARD:

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.

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