ask a question: will these boxes fit into my car?
TRANSCRIPT
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Ask a question: Will these Ask a question: Will these boxes fit into my car?boxes fit into my car?
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What do I need to measure?What do I need to measure?How will I measure it?How will I measure it?
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VolumeVolume
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Measuring VolumeMeasuring Volume
VolumeVolume is the amount of is the amount of spacespace an object takes up an object takes up..
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* When referring to waterLiter Image: http://www.dmturner.org/Teacher/Pictures/liter.gif
Metric UnitsMetric Units The base unit of volume in the metric system The base unit of volume in the metric system
is the is the literliter and is represented by and is represented by L or lL or l..
Standard: 1 liter is equal to one cubic Standard: 1 liter is equal to one cubic decimeterdecimeter
1 liter (L) = 1000 1 liter (L) = 1000 milliliters (mL)milliliters (mL)
1 milliliter (mL) = 1 1 milliliter (mL) = 1 cmcm33 (or cc) = 1 gram* (or cc) = 1 gram*
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The volume of objects can The volume of objects can be measured in three be measured in three
different waysdifferent ways
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Volume of a liquidVolume of a liquid
Use a graduated cylinderUse a graduated cylinder Units will be mL or LUnits will be mL or L Read the bottom of the Read the bottom of the
curve (the meniscus)curve (the meniscus)
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Looking at the meniscusLooking at the meniscus Move to eye level with the waterMove to eye level with the water
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Look carefully!Look carefully!
The graduated cylinder on the left is The graduated cylinder on the left is divided into increments of divided into increments of 22 mL, so mL, so the volume in it is the volume in it is 1212 mL. mL.
The graduated cylinder on the right is The graduated cylinder on the right is divided into increments of divided into increments of 11 mL, so mL, so the volume in it is the volume in it is 1616 mL. mL.
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What is the volume?What is the volume?
6mL6mL
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Volume of a solid (box Volume of a solid (box shaped)shaped)
Use a rulerUse a ruler Units are cmUnits are cm33 or m or m33
Measure the Measure the length, width, and length, width, and height of the height of the objectobject
Multiply the Multiply the numbers togethernumbers together
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What’s the volume?What’s the volume?
5cm x 5cm x 5cm = ?5cm x 5cm x 5cm = ? 125cm125cm33
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How do I measure a solid How do I measure a solid that is irregularly shaped?that is irregularly shaped?
You can use water displacementYou can use water displacement
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What will happen if you What will happen if you climb in this bathtub? Why?climb in this bathtub? Why?
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Volume of irregularly Volume of irregularly shaped objectsshaped objects
Use a graduated cylinderUse a graduated cylinder Units are mL or cmUnits are mL or cm33
Find the starting volume: Find the starting volume: 4.8mL4.8mL
Put in the object and find Put in the object and find the new volume: 5.6mLthe new volume: 5.6mL
The difference is the The difference is the volume of the object:volume of the object:
5.6 – 4.8 = 0.8mL5.6 – 4.8 = 0.8mL
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What is the volume of the What is the volume of the hammer?hammer?
Starting volume: Starting volume: 65mL65mL
Volume with Volume with object: 69mLobject: 69mL
Volume of Volume of hammer:hammer:
69 – 65 = 4mL or 4 cm69 – 65 = 4mL or 4 cm33
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http://www.youtube.com/watch?v=s5u5cmA9Dp0
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Measuring Liquid Volume
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swfWhat is the volume of water in each cylinder?
Pay attention to the scales for each cylinder.