Unit 3: Chemistry
Name
Day 6 – Density, Day 2
Pod
Date
Unit Essential Questions:
1.
2.
3.
What is the smallest part of an element?
How are atoms and elements related?
How do scientists use density to identify
substances?
Vocabulary:
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SWBAT
 …explain the concept of density.
Density
Mass
Volume
Sink
Float
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… identify whether objects will sink or float in
liquids.
DO NOW: Four Square Do Now
What is the base unit for mass?
What is the base unit for volume?
What does mass measure about an object or a substance?
What does volume measure about an object or substance?
Video
Match the words to the correct definitions
a.
b.
c.
Mass
Weight
Volume
_______ A measurement of how gravity affects mass.
_______ The amount of matter contained in an object.
_______ A measurement of how much space an object takes up.
1.
How are mass and weight different?
2.
Why would an object float in water?
3.
Why would an object sink in water?
GUIDED NOTES: Understanding Density
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Mass and volume are physical properties. Together, they are used to find the density of an object.
Density is the amount of _________________________ in a given _______________________ or ______________________.
o Relationship between ____________________________ and ___________________________________.
o More matter in less space = _____________________ dense.
o Less matter in more space = ____________________ dense.
More Dense
Less Dense
STOP AND JOT: What is density?
Homework: Finish guided notes packet. Read and complete textbook pages 84-93, 97, and questions 1, 2, 4, and 6 on
page 98.
GUIDED PRACTICE: CER Method and Density
Directions: Use the CER method to explain which college campus is denser.
Situation:
The University of Kansas’ campus is 1,000 acres and has 28,000 students. The University of Texas at Austin is 424 acres and has
51,000 students. Which campus is denser?
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INDEPENDENT PRACTICE: CER Method and Density
Directions: Use the CER method to explain which town is denser?
The cities of Waterloo and Motley are both 500,000 square feet. Waterloo has a population of 99,000 and Motley has a
population of 25,000. Which city is denser? Use the CER method to explain your answer.
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Homework: Finish guided notes packet. Read and complete textbook pages 84-93, 97, and questions 1, 2, 4, and 6 on
page 98.
GUIDED NOTES: Sink or Float?
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The density of water is 1 g/cm3 or 1 g/mL.
o
This is because 1 mL of water fits inside 1 cm3 square.
o
cm3 is used to measure _________________ objects.
o
mL is used to measure ________________________.
If an object is ___________________ dense than water, it will
____________________________.

If an object is ___________________ dense than water, it will ____________________________.
STOP AND JOT: Why did the diet coke float while the regular coke sank?
GUIDED PRACTICE: Notebook Paper Practice
Object
Feathers
Prediction {Sink or Float?}
Density {g/cm3}
Sink or Float? Why?
Bricks
Gold
Ice
Homework: Finish guided notes packet. Read and complete textbook pages 84-93, 97, and questions 1, 2, 4, and 6 on
page 98.
INDEPENDENT PRACTICE:
Use the objects and their densities below to determine if the objects will float or sink in water.
Object and Density
More than 1 g/cm3 or less
than 1 g/cm3?
Float or Sink? Why?
Magnesium – 1.7 g/cm3
Oak – 0.7 g/cm3
Popcorn – 0.03 g/cm3
Milk – 1.03 g/mL
The picture below shows an iceberg and a treasure chest in water. Using what you know about densities, answer the questions
below in complete sentences.
1. Based on the figure, what should be concluded about the density of the iceberg
compared to the density of seawater? Explain your answer.
2. Based on the figure, what should be concluded about the density of the iceberg
compared to the density of the treasure chest? Explain your answer.
Homework: Finish guided notes packet. Read and complete textbook pages 84-93, 97, and questions 1, 2, 4, and 6 on
page 98.