September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and...
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![Page 1: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/1.jpg)
September 29, 2014• Do-Now: Come in quietly and
take out your notebook. Write your HW into agenda and answer the follow question.
• Answer the following questions reviewing metric system
• WRITE THE METRIC UNIT FOR EACH QUANITY BELOW
• Kilograms• Seconds• Liters• Meters• Cubic centimeters
• HW
• Pages 74 and 75 in workbook
![Page 2: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/2.jpg)
DensityDensityObjective: How is density
determined?
![Page 3: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/3.jpg)
What is Density?What is Density?
• Which one is more dense, a bowling ball or a soccer ball?
• Even though they are both approximately the same size and shape, the bowling ball is much more dense.
![Page 4: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/4.jpg)
DensityDensity
• Density is the amount of mass in a given a space
• Density = Mass Volume
![Page 5: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/5.jpg)
• Hot Air• More energy, molecules are moving faster• Molecules are more spread apart• Which sample shows warmer air?
• Hot Air• More energy, molecules are moving faster• Molecules are more spread apart• Which sample shows warmer air?
![Page 6: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/6.jpg)
The two rooms are the same size. 50 people come to one party and 37 people come to the other party. Which one is more dense
![Page 7: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/7.jpg)
Let’s put it all together…Let’s put it all together…
• DENSITY is the ratio of the mass of a substance to the volume of the substance
UNITS: commonly expressed as grams per cubic centimeter for solids and liquids and grams per liter for
gases
![Page 8: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/8.jpg)
Find the Density of the CubeFind the Density of the Cube
10 cm3 cm
8 cm
Mass = 480 grams
Volume= LxWxH=10x3038= 240 cm3
![Page 9: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/9.jpg)
Density ProblemsDensity Problems
• Calculate the density of a rock that has a mass of 40 grams and a volume of 5 cm3.
• 40g/5 cm3 = 8 g/cm3
![Page 10: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/10.jpg)
Density FactsDensity Facts
• The Density of a substance remains the same regardless of size, shape, or mass of sample!!!
• Example: The density of a piece of aluminum is 2.7 g/cm3.
• If you cut the Al bar in half, the density of each piece is still 2.7 g/cm3
• Even if you roll the aluminum into a sheet the density will still remain the same
![Page 11: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/11.jpg)
Density of AluminumDensity of Aluminum
D = 2.7 g/cm3D = 2.7 g/cm3
By simply cutting the bar in half, the density remains the same!!!
![Page 12: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/12.jpg)
What will change the density of an object?
What will change the density of an object?
• Temperature• As the temperature of a substance
INCREASES the density DECREASES due to the expansion of the substance
Inverse Relationship
Most substances EXPAND when heated and CONTRACT when cooled
![Page 13: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/13.jpg)
• Warm air rises because it is LESS dense
• Cold air sinks because it is MORE dense
![Page 14: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/14.jpg)
• Material DENSER than water will SINK in water
• Material LESS DENSE than water will FLOAT
• Materials with a density EQUAL TO water may remain at ANY LEVEL
• When several objects of different densities float on water, the LEAST DENSE objects float HIGHEST.
![Page 15: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/15.jpg)
A B
C
D
Water: 1 g/ml
Object D: 2 g/cc
Object C: 1 g/cc
Object B: 0.4g/cc
Object A: 0.8g/ccWhy is object D sinking
Why is object A floating
![Page 16: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/16.jpg)
How do we measure the MASS of an object?
![Page 17: September 29, 2014 Do-Now: Come in quietly and take out your notebook. Write your HW into agenda and answer the follow question. Answer the following questions.](https://reader034.fdocuments.us/reader034/viewer/2022051417/5697bffa1a28abf838cc03b9/html5/thumbnails/17.jpg)
How do we measure the VOLUME of a cube?