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Calculate the density for the following
objects:
A ball with a volume of 10cm³ and a mass
of 30g
A backpack with a volume of 200cm³ and
a mass of 400g
A soda with a volume of 100mL and a
mass of 100g
A safe with a volume of 1m³ and a mass
of 2kg
DO NOW
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To figure the density of liquid, you use the
same formula
Mass/volume = Density
You first measure the mass of an empty
graduated cylinder
Then, you pour in the liquid and measure its
volume
Next, you find the mass of the graduated
cylinder with the liquid inside
Subtract the mass of the graduated cylinder
from the mass of both to find the mass of the
liquid
Liquid Density
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Each table needs:
1 Small Graduated Cylinder (smallie)
1 Large Graduated Cylinder (tallie)
1 Triple Beam Balance
Goggles for each student
Paper and pencil to record results
Liquid Density Lab
Everyone must wear their goggles at ALL
times!
 Do not play with the liquids – no drinking
spilling, tasting, etc.
 Do not waste the liquids – only use the
correct amount
 Any student who is not following the rules
will not participate and receive a 0 for the
lab
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Liquid Density Lab
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Step 1 – Measure the mass of your small
graduated cylinder
Step 2 – Pour 20mL of syrup into your small
graduated cylinder
Step 3 – Measure the mass of the syrup
Step 4 – Subtract the mass of the graduated
cylinder alone from the mass of the syrup –
this gives you the mass of the syrup alone
Step 5 – Slowly pour the syrup into the large
graduated cylinder
Repeat steps 2-5 with the dish soap,
shampoo, water, and oil (in this order!)
Step 6 – Find the density of each liquid
Liquid Density Lab
When finished, wash out your graduated
cylinders and return all materials to their
proper places
 Wash your hands!
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Liquid Density Lab
Why do you think the liquids made layers?
 How is density related?
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Liquid Density Lab
Liquids that have a lower density will
“float” on liquids that have a higher
density
 The same is true for solids – if the solid
has a lower density than the liquid it’s in –
it will float!
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Liquid Density
Page 55
 On scratch paper, answer at least
questions 1-16
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Chapter Review
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For the listening competition, someone
reads an essay
You take notes
Then you answer the questions about
what you heard
Selection test will be Tuesday after school
Sign-up sheet will be on my door
UIL Listening
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Have a great weekend!
For Monday