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How much water is in the world?
Watery Planet Unit | Lesson 1 of 5

# How much water is in the world?

Watery Planet Unit | Lesson 1 of 5
Lesson narration:
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DISCUSS (1 of 2):

Imagine you were floating alone in a boat on the ocean with nothing. What problems would you face? What would you need to survive?

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DISCUSS (2 of 2):

I’m sure you thought of many problems you’d face, like needing food to survive. What about needing water to survive? Would that be a problem? Why or why not?

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DISCUSS (1 of 2):

List all the ways that you and your family use water. Imagine what your life would be like if this water disappeared. How would things change?

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DISCUSS (2 of 2):

How much water do you think your family uses in a day?

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DISCUSS (1 of 2): Make a Guess

Do you think there's the same amount of fresh water and salt water on Earth? Or do you think there's more of one than the other? If so, how much more do you think there is? Twice as much? Five times as much? Or some other amount?

Remember your guess for later.

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DISCUSS (2 of 2):

Can you think of a way to figure out how much of the earth is covered by salt water and how much by fresh water?

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# If you need a natural stopping point!

Teachers: If you are short on time, this is a good stopping point. Your students can make their graph in a future session.

If you’re continuing right now, advance to the next slide.

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# salt water

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water with salt in it, such as the ocean
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# fresh water

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water that is not salty, such as the water in most lakes and rivers
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# lake

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a large area of water with land all around it
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# ocean

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a large area of salt water that covers the Earth
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# ice cap

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a large area of frozen water found on the surface of the Earth
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# hydrosphere

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all the water (solid, liquid, gas) on and around planet Earth
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# data

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recorded measurements or observations
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# graph

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an image that helps you understand information
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# estimate

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an educated guess about a number
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# area

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a measurement of the surface of something
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# volume

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how much space something takes up
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🎉 That’s it for this lesson! How did it go?
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# Image & Video Credits

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Other
goldfish in fishbowl by Image used under license from Shutterstock.com: r.classen
seawater blue by Pexels , used under Public Domain
washing hands in sink by Image used under license from Shutterstock.com: Thanakorn Hongphan
girl drinking water by Image used under license from Shutterstock.com: picturepartners
groceries by Pixabay , used under Public Domain
planet earth by NASA , used under Public Domain
pouring orange juice into bottle by Image used under license from Shutterstock.com: somsak suwanput
caught fish in wooden crates by Image used under license from Shutterstock.com: dzorikto
cup of tea by Image used under license from Shutterstock.com: Africa Studio
fisherman by Image used under license from Shutterstock.com: somsak suwanput
jellyfish held in hand by Image used under license from Shutterstock.com: Valeriia Serykh
sprite can by Image used under license from Shutterstock.com: Abramova Elena
coffee in paper cup by Image used under license from Shutterstock.com: Africa Studio
scuba diver under water by Pixabay , used under Public Domain
boat in ocean by Pexels , used under Public Domain
great white shark by Image used under license from Shutterstock.com: Elsa Hoffmann
interior blue bathroom by Image used under license from Shutterstock.com: Artazum
great white shark fin above water by Image used under license from Shutterstock.com: Sergey Uryadnikov
hand scooping water by Image used under license from Shutterstock.com: Janis Smits
toothbrush under running water by Image used under license from Shutterstock.com: rodimov
flushing toilet by Image used under license from Shutterstock.com: Timin
video of vast ocean by OG Pyro
salt and salt shaker by Image used under license from Shutterstock.com: Yulia Furman
small boat in the ocean by Image used under license from Shutterstock.com: Pushish Images
irrigation of farmland by Image used under license from Shutterstock.com: Rudy Umans
gray map of the united states by Image used under license from Shutterstock.com: Miceking
hand scooping water by Image used under license from Shutterstock.com: hidesy
salt shaker by Image used under license from Shutterstock.com: Nature Art
buckets of water by Image used under license from Shutterstock.com: Sutichak
crystal geiser bottle by Webstaurant Store , used under Public Domain
rain cloud by Image used under license from Shutterstock.com: Sergey Nivens
faucet by Image used under license from Shutterstock.com: ILYA AKINSHIN
water bottle by Image used under license from Shutterstock.com: Bluskystudio
running faucet by Image used under license from Shutterstock.com: Saran Jantraurai
blurry man holding umbrella by Image used under license from Shutterstock.com: CHOKCHAI POOMICHAIYA
grand teton national park by Image used under license from Shutterstock.com: Pung
Lesson narration:

Water Cycle & Earth's Systems

Hydrosphere & Water Distribution

5-ESS2-2

# Activity Prep

Print Prep

In this lesson, students use estimation and graphing to discover the surprising difference in the amounts of fresh and salt water on Earth. In the activity, Map the World's Water, students count squares on maps and record the amount of fresh, frozen, and salt water found in their assigned area of the world. Then students calculate and graph how much of each type of water is present on the planet.

Preview activity
Exploration

#### 25 mins

Hands-On Activity

Wrap-Up

#### 5 mins

Water Cycle & Earth's Systems

Hydrosphere & Water Distribution

5-ESS2-2

## Extend this lesson

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