Post on 01-Jan-2016
Bell Work DateSPI 0807.9.7 Density
1) The volume of a cylinder is 20 cm3 , and the mass is 2 grams.
Answer these two questions. Do not use a calculator
Density= 20 2
Answer: 0.1 g/cm3
Density= volume mass
Volume: 3cm3
Density: 3.6 g/cm3
2) The density of this cube is 3.6 g/cm3. The volume is 3 cm3.
Compute the density of this cylinder.
Compute the mass.(Round to the nearest whole number)
Mass = Volume x DensityMass = 3 x 3.6
DMV
MVDAnswer: 10.8 rounded to 11 g
SPI 0807.9.7 Density
What is density? Density is the amount of matter (mass)you have crammed in a given space (volume)Reminder: mass is how much matter is in an object The unit for mass is grams (mg or g or kg)Reminder: volume is how much space it takes up (size) Unit for solid volume is cubic meters (cm3 or m3 or km3) Unit for liquid volume is liters (mL or L or kL)
To compute density - divide the mass by the volume of the object
View this YouTube Video Clip:Link: What Is Density Video by TheScienceClassroom.org
ScienceNotes
Mass: 19g Volume: 7cm3
(A)
(D) (C)
(B)
Mass: 12g Volume: 3cm3
4 g/cm32.71 g/cm3
Mass: 11g Volume: 3cm3
3.6 g/cm3
Mass: 23g Volume: 5cm3
4.6 g/cm3
ScienceNotesSPI 0807.9.7
Density Which cube below has the LEAST density?
This time, do not use a calculator.Compute density on your paper while I work it on the board. Show all your work, and
don't Forget Your Units!written like this…g/cm3
ScienceNotesSPI 0807.9.7
Density Answer this question.
Again, do not use a calculator, and show all your work.Compute the density on your paper while I work it on the board.
Density= 90 810.0
Density= volume mass
Answer9 g/cm3
ScienceNotesSPI 0807.9.7
Density Answer this question. Do not use a calculator.
Work it out on your paper while I do it on the board.Show all your work.
Sample A1 g/ml
Sample B0.8 g/ml
Sample C1.08 g/ml
Sample D0.9 g/ml
Sample A
D= 100 100 Sample B
D= 100 80
Sample C
D= 100 108 Sample D
D= 100 90
Don't Forget Your Units!written like this…g/ml
SPI 0807.9.7 Density
ScienceNotes
Density In LiquidsLower density liquids float on top of liquids with higher densityHigher density liquids will sink below lower density liquids
View this YouTube Video Clip:Link: 7-Layer Density Column
SPI 0807.9.7 Density
ScienceNotes
Density In LiquidsLower density liquids float on top of liquids with higher densityHigher density liquids will sink below lower density liquids
Here is a density column with 6 liquids
06
05
04
03
02
01
The top liquid (06)-least densityThe bottom liquid (01)-greatest density
One liquid has a density of 2.5 g/mLOne liquid has a density of 0.7 g/mLOne liquid has density of 1.7 g/mLQuestion: Which of these liquids would be on the bottom, and which one would be on top?Bottom: 2.5 g/mL (liquid 01) -greatest densityTop: 0.7 g/mL (liquid 06) -least density
SPI 0807.9.7 Density
ScienceNotes
Density Teaching Ideas