Transcript Density
Do Now
Please write HW in your agenda.
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Page # Title
43-44 Density
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
Cut out the large triangle.
Glue down ONLY the middle triangle.
Fold in the other three triangles on the sides.
Mass
Mass is the amount
of matter that an
object or substance
contains.
Mass is measured in
grams (g).
Equation: M = D x V
Volume
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
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!
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
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