Transcript AIM: Measuring Length with the Metric System.
AIM: How is the volume of irregularly shaped objects measured?
VOCABULARY
Water displacement method
Irregularly shaped object
OBJECTIVE
To successfully measure volume of irregularly shaped object.
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DEFINITION
What is volume ?
Volume is the amount of space an object takes up.
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In the Metric System
What is a regularly shaped object?
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…an object whose length, width, and height can be accurately measured with a ruler !
In the Metric System 4/28/2020
When we calculate the volume of a regularly shaped object, what unit do we use?
m 3 or cm 3
In the Metric System
What is an irregularly shaped object? …an object whose length, width, and height cannot be measured with a ruler !
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In the Metric System
For liquids, the standard unit of measure for volume is … liter
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What is this called?
A rock 4/28/2020
How can you measure its volume Can you measure its height, width, and length?
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So how do you measure its volume 4/28/2020
Water displacement method Need a graduated cylinder
Water Displacement Method 4/28/2020 •Using your graduated cylinder •Step 1: measure the volume of water
Water Displacement Method •What is the volume of the water?
•7 ml 4/28/2020
Water Displacement Method 4/28/2020 •Step 2: insert the rock in the water •Re-measure the water in the cylinder!
Water Displacement Method •What is volume now?
•9 ml 4/28/2020
Water Displacement Method •Step 3: Subtract the first measurement from the second.
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Water Displacement Method •The difference in the measurements is the volume of the rock in ml 4/28/2020
Water Displacement Method 4/28/2020 •Even though to measure the volume of the rock •cm 3
3 How do you measure the volume of an irregularly shaped object?
•With a graduated cylinder •Using the water displacement
method
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3 Is the water displacement method an example of a direct or an indirect measurement?
•Indirect !! 4/28/2020
3 Give an example of an irregularly shaped object?
•A rock •A screw •A penny •A marble 4/28/2020
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Lets Practice reading a graduated cylinder: What is the volume here?
What is the increment?
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Lets Practice reading a graduated cylinder: What is the volume here?
What’s the increment?
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Lets Practice reading a graduated cylinder: What is the volume here?
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Basic Terminology
1 liter = 1000 milliliters 1 l = 1000 ml
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a milliliter is the SAME SIZE as a cubic centimeter or “cc” for short