Transcript Density

Do Now
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Please write HW in your agenda.
Please update your table of contents.
Page # Title
43-44 Density
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Date
10/29/14
Please answer “Do Now” questions 1 and 2 on
the top of the sheet from the cart.
You do not have to tape the sheet in until we
complete it during class.
Density Foldable
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Cut out the large triangle.
Glue down ONLY the middle triangle.
Fold in the other three triangles on the sides.
Mass
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Mass is the amount
of matter that an
object or substance
contains.
Mass is measured in
grams (g).
Equation: M = D x V
Volume
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Volume is the amount
of space that an object
or substance occupies.
Volume is measured in
liters (L).
Don’t forget:
1 mL = 1 cm³
Liquid
Solid
Equation: V = M ÷ D
Density
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Density is the amount
of mass per unit of
volume of an object or
substance.
Density is measured in
units of g/cm³ or
g/mL.
There can be more!
 Think up some units!
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D=M/V
What else is measured as a ratio?
Speed = distance/time
Review of units
Mass:
Base unit: g
kg hg dag
dg
cg
mg
Volume of a liquid:
Base unit: L
kL hL daL dL
cL
mL
Volume of a solid:
cm3
km3 hm3 dam3
m3 dm3
mm3
Units of density
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ANY mass unit PER ANY volume unit
Which of the following are appropriate density
units?
Density Problem
Sample Problem:
Mass = 10 g
Volume = 2 cm3
Equation:
D = M/V
Substitution:
D = 10 g/2 cm3
Solution:
D= 5 g/cm3
In other words: for each cm3 there are 5g
Density = ??? g/cm3
Density Problem
Mass = 50 g
Equation:
Substitution:
Solution:
Volume = 10 cm3
Density = ??? g/cm3
Density Problem
Mass = ??? g
Equation:
Substitution:
Solution:
Volume = 25 cm3
Density = 3 g/cm3
Density Problem
Mass = 48 g
Equation:
Substitution:
Solution:
Volume = ??? cm3
Density = 8 g/cm3
Density Problem
Mass = 14.76 g
Equation:
Substitution:
Solution:
Volume = 4.1 cm3
Density = ??? g/cm3
Density Problem
Mass = 85.5 g
Equation:
Substitution:
Solution:
Volume = ??? cm3
Density = 4.5 g/cm3
Exit Slip – Solve for density.
Mass = 78 g
Equation:
Substitution:
Solution:
Volume = 6 cm3
Density = ??? g/cm3