1 00:00:00,000 --> 00:00:09,259 The Properties of Matter. How can we measure matter? Read and think. 1. Read and answer the 2 00:00:09,259 --> 00:00:16,719 questions. A. Which property of matter can you measure with a jug of water? B. Which property 3 00:00:16,719 --> 00:00:22,780 of matter can you measure with scales? C. What do we need to know to measure density? 4 00:00:22,780 --> 00:00:32,439 Matter has three properties, volume, mass, and density. Volume is the amount of space 5 00:00:32,439 --> 00:00:40,439 that matter occupies. The unit of measurement for volume is cubic centimeters, so cm to the third 6 00:00:40,439 --> 00:00:48,539 degree. A football has a bigger volume than a tennis ball. It's true because it's much bigger. 7 00:00:48,539 --> 00:00:58,020 mass is the amount of matter in an object we measure mass in grams and kilograms we use scales 8 00:00:58,020 --> 00:01:04,180 to measure mass usually if you're a baker and you're at home baking bread for instance you 9 00:01:04,180 --> 00:01:11,980 need to measure the amount of flour right and usually you use a scale finding the mass and 10 00:01:11,980 --> 00:01:19,159 volume of a stone we can use scales to find out the mass of a stone right we can use a measuring 11 00:01:19,159 --> 00:01:26,959 jug and water to find out the volume of a stone. Fill the measuring jug with water up to the 500 12 00:01:26,959 --> 00:01:35,359 milliliter mark. Place the stone in the jug. The volume of stone makes the water level rise 13 00:01:35,359 --> 00:01:44,760 at the rate of one milliliter equals one cubic centimeter. Subtract 500 milliliters 14 00:01:44,760 --> 00:01:52,799 from the new water level. 600 milliliters minus 500 milliliters is 100 milliliters. 15 00:01:53,239 --> 00:02:02,019 100 milliliters equals 100 cubic centimeters. The volume of the stone is thus 100 cubic centimeters. 16 00:02:03,459 --> 00:02:10,699 Density is the amount of mass that there is in the volume of an object. Ooh, tricky. To find out 17 00:02:10,699 --> 00:02:19,439 the density of an object, we divide its mass by its volume. Compare the density of these two 18 00:02:19,439 --> 00:02:26,780 different stones. So the volume of the first stone is five cubic centimeters, and its mass is 12.5 19 00:02:26,780 --> 00:02:35,080 grams. So what do we do? We divide its mass, 12.5 grams, divided by five cubic centimeters, 20 00:02:35,080 --> 00:02:45,819 its volume. So its density is 2.5 grams over cubic centimeters. Now let's look at the other 21 00:02:45,819 --> 00:02:54,840 stone. So again, we divide its mass, 15 grams, by its volume, 7.5 cubic centimeters, which comes 22 00:02:54,840 --> 00:02:57,819 out to 2 grams over cubic centimeters.