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Topic 18
3rd Grade
Created 2012
Volume
18-1
• You have already learned how to measure the area of plane (2-D) figures. Today you will learn how to measure the amount of space inside solid (3D) figures.
Customary Units of Capacity
18-2
• You have already learned how to measure the volume of solid figures. Today you will learn how to measure how much a container holds.
• This container holds about a cup. What other containers hold about one cup?
• Pint?
• Quart?
• Gallon?
Capacity
• The amount of liquid a container will hold
• 1 cup (c)= school milk
• 1 pint (pt)= small ice cream
• 1 quart (qt) = orange juice carton
• 1 gallon (gal)= gallon of milk
• 2 cups = 1 pint
• 2 pints = 1 quart
• 4 quarts = 1 gallon
Let’s Practice!
Choose the best estimate
A. 1 c
B. 1 qt
Choose the best estimate
A. 3 pt
B. 3 gal
Choose the best estimate
A. 1 pt
B. 1 gal
Choose the best estimate
A. 1 c
B. 1 pt
Choose the best estimate
A. 1 c
B. 1 pt
Choose the best estimate
A. 2 pt
B. 2 qt
Choose the best estimate
A. 22 c
B. 22 qt
Kitchen sink
Choose the best estimate
A. 1 c
B. 1 qt
Water glass
Choose the best estimate
A. 1 c
B. 1 qt
Baby bottle
Choose the best estimate
A. 3 c
B. 3 qt
Tea kettle
Choose the best estimate
A. c
B. pt
Tea cup
Choose the best estimate
A. c
B. qt
Pitcher of juice
Which measurement best describes the capacity of a
bathtub?
A. 50 cups
B. 50 quarts
C. 50 gallons
D. 50 pints
Which of the objects below holds about 1 pint?
A. Can of soup
B. Punch bowl
C. Gas tank
D. pool
Which is NOT a customary unit used to measure capacity?
A. pint
B. cube
C. quart
D. gallon
Which of these objects probably holds about 1 pint?
A. Bath tub
B. barrel
C. Dog bowl
D. Tea spoon
Which measurement best describes the capacity of a juice
box you might bring with your lunch?
A. 1 cup
B. 1 pint
C. 1 quart
D. 1 gallon
Units of Weight
18-3
• You have learned how to measure the capacity of a container. Today you will learn how to measure how heavy an object is.
• What objects could be about as heavy as this textbook?
• The weight of an object is a measure of how heavy the object is or how strong gravity is pulling down on an object.
Weight
• a measure of how heavy the object is or how strong gravity is pulling down on an object.
• 1 ounce (oz) weighs about
the same as one slice of bread
• 1 pound (lb) weighs about the
same as a loaf of bread
• 1 ton (T) weighs about the
same as a small car
• 16 ounces = 1 pound
• 2,000 pounds = 1 ton
How much does this weigh?!
A. 1 oz
B. 1 lb
How much does this weigh?!
A. 6 oz
B. 6 lb
How much does this weigh?!
A. 10 oz
B. 10 lb
How much does this weigh?!
A. 300 lb
B. 300 T
How much does this weigh?!
A. 200 lb
B. 2 T
How much does this weigh?!
A. 2 oz
B. 2 lb
How much does this weigh?!
A. 1 oz
B. 1 lb
A cracker
How much does this weigh?!
A. 30 oz
B. 30 lb
Television set
How much does this weigh?!
A. 5 oz
B. 5 lb
Baseball hat
How much does this weigh?!
A. 30 lb
B. 3 T
elephant
How much does this weigh?!
A. lb
B. T
Student desk
How much does this weigh?!
A. oz
B. lb
lemon
How much does this weigh?!
A. oz
B. lb
bicycle
How much does this weigh?!
A. lb
B. T
truck
Which animal weighs about 1 ton?
A. Squirrel
B. Giraffe
C. Wolf
D. Monkey
Which animal weighs about 1 ounce?
A. fox
B. lamb
C. mouse
D. kangaroo
Which is the best estimate for the weight of a stove?
A. 250 ounces
B. 250 pounds
C. 250 tons
D. 250 feet
Metric Units of Capacity
18-4
• You have learned how to find the capacity of containers using customary units. Today you will learn how to find the capacity of containers using metric units.
• Milliliter (mL) = 20 drops from eyedropper
• Liter (L) = big water bottle
• 1,000 milliliters = 1 liter
Let’s practice!
Choose the better estimate.
A. 250 mL
B. 2 L
Choose the better estimate.
A. 5 mL
B. 1 L
Choose the better estimate.
A. 40 mL
B. 40 L
Choose the better estimate.
A. 15 mL
B. 1 L
Choose the better estimate.
A. 14 mL
B. 14 L
Choose the better estimate.
A. 250 mL
B. 250 L
Choose the better estimate.
A. 150 mL
B. 15 L
Tea cup
Choose the better estimate.
A. 115 mL
B. 115 L
bathtub
Choose the better estimate.
A. 3 mL
B. 3 L
Bottle cap
Choose the better estimate.
A. 1 L
B. 10 L
teapot
Choose the better estimate.
A. mL
B. L
Soup can
Choose the better estimate.
A. mL
B. L
Water pitcher
Choose the better estimate.
A. mL
B. L
Swimming pool
Choose the better estimate.
A. mL
B. L
Baby bottle
Which measurement best describes the capacity of a can
of paint?
A. 4 mL
B. 4 L
C. 40 L
D. 40 mL
Which container holds more than 1 liter?
A. Fish tank
B. Baby’s cup
C. Cereal bowl
D. Bottle of perfume
Which measurement best describes the capacity of a
punch bowl?
A. 6 mL
B. 60 mL
C. 6 L
D. 60 L
Units of Mass
18-5
• You have learned how to measure the weight of an object using customary units of measure. Today you will learn how to measure the mass of an object using metric units.
• What other objects have about the same amount of matter as a dollar bill?
• The mass of an object is a measure of the amount of matter in an object.
• 1 gram (g) = mass
as a paperclip
• 1 kilogram (kg) = mass as a baseball bat
• 1,000 grams = 1 kilogram
• This textbook has a mass of about 1 kilogram. How can you use this information to determine whether a stapler has a mass greater than or less than 1 kilogram?
• How can knowing the mass of the book help you estimate the mass of the stapler?
• Is the mass of the stapler more or less than a kilogram?
What is the mass?!
A. 5 g
B. 5 kg
What is the mass?!
A. 40 g
B. 4 kg
What is the mass?!
A. 100 g
B. 10 kg
What is the mass?!
A. 15 g
B. 15 kg
What is the mass?!
A. 4 g
B. 400 g
What is the mass?!
A. 400 g
B. 4 kg
Bag of oranges
What is the mass?!
A. 2 kg
B. 12 kg
Bicycle
What is the mass?!
A. 1 g
B. 1 kg
feather
What is the mass?!
A. 5 kg
B. 550 kg
horse
What is the mass?!
A. 3 g
B. 300g
penny
What would this tool measure?
A. Capacity of a glass
B. Temperature of water
C. Length of a box
D. Weight of a pear
E. Length of time you sleep
What would this tool measure?
A. Capacity of a glass
B. Temperature of water
C. Length of a box
D. Weight of a pear
E. Length of time you sleep
What would this tool measure?
A. Capacity of a glass
B. Temperature of water
C. Length of a box
D. Weight of a pear
E. Length of time you sleep
What would this tool measure?
A. Capacity of a glass
B. Temperature of water
C. Length of a box
D. Weight of a pear
E. Length of time you sleep
What would this tool measure?
A. Capacity of a glass
B. Temperature of water
C. Length of a box
D. Weight of a pear
E. Length of time you sleep
Which measurement best describes the mass of a rabbit?
A. 2 grams
B. 2 kilograms
C. 2 liters
D. 2 meters
Which would you use to describe the mass of a
watermelon?
A. 4 grams
B. 4 liters
C. 4 kilograms
D. 4 meters
Which measure would best describe the mass of a dime?
A. 2 grams
B. 2 meters
C. 2 liters
D. 2 ounces
Jerry’s math book has a mass of 1 kilogram and 374 grams. Which is another way to express this mass?
A. 1,374 kilograms
B. 1,374 grams
C. 3,740 grams
D. 374,000 grams