How much water is in the world?

How much water is in the world?

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?

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?

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?

DISCUSS (2 of 2):

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

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.

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?

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.

Slide Image
Slide Image

salt water


1 of 11

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


2 of 11

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


3 of 11

a large area of water with land all around it
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ocean


4 of 11

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


5 of 11

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


6 of 11

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


7 of 11

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


9 of 11

an educated guess about a number
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area


10 of 11

a measurement of the surface of something

volume


11 of 11

how much space something takes up

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
running shower head by Image used under license from Shutterstock.com: Telekhovskyi
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
icebergs by Image used under license from Shutterstock.com: leospek

Featured Reviews

“This is a wonderful lesson. It took minimal preparation for a fabulous, meaningful and scientifically logical approach to such an important, global topic. The learners took away a deeper sense of responsibility in their use of fresh water. Partner work was optional. The stronger students tend to prefer independent work, so I gave them the additional maps, and let the partners check each others' counting. Great lesson. ”
“My students loved the math activity. I was worried that it wouldn't be engaging enough, and almost every single one asked if they could do more than one piece! They also loved that it connected to our unit on area and that it also had division. I really appreciated the standards based math application. ”
“My students liked it and creating the graph was a great visual for my students to see how important it is for us to work together in keeping our fresh water clean and not wasting it. I especially liked all the mathematics that are incorporated into the Mystery.”
“Once again, Mystery Science has created an amazingly simple, yet powerful way for the kids to see what we are learning about. The post-it note graph stayed up for days because they were so excited about it. We showed everyone who came in our home.”
“I love how engaging the video is, and how easy the lesson plan is to follow. Since it was the first lesson I have done from Mystery Science, I wasn't sure how much preparation I would need. The activity instructions were very easy to follow. My students enjoyed this lesson!”
“Everything was excellent. From the video introduction, which was immediately engaging for the kids, to the printable worksheets it was an enjoyable activity that got all the kids thinking and learning!”
“The students really loved seeing the end result of the graph! I loved how it incorporated 5th grade math standards and I was able to expand the math portion and skip our math curriculum for the day!”
“Prep was extremely easy. Students were very engaged. Their predictions about how much fresh/salt water is present on Earth were totally off, so they learned a big lesson. We're looking forward to the next mystery.”
“My students always learn alot with this activity and appreciate nature more. ”
“Fun and interesting lesson. The graph really put things into perspective!”
“The best part was seeing the students make the connection between the trick to counting the squares quickly and the formula for finding area. The graph they made was a great visual for pointing out just how little fresh water is available and the need to protect the fresh water along with the need to discover ways to make use of the salt water. As always the hands-on learning is "fantastically fun."”
“I loved seeing the students visually graphing the results! Having each student count part of the Earth made students feel more needed and accountable in the activity. My students were fully engaged!”
“Videos were engaging and very interesting and the step by step format to complete the activity was easy to follow and enjoyable. Students got great experience predicting, estimating, graphing, and discussing.”
“I used this lesson for a 4th grade science in MS. Our standards do not follow NGSS very closely. I specifically like how Mystery 1 relates math and science: find the area of salt water and fresh water, and build a graph. ”
“The students realized the value of the fresh water they take for granted each day. It led to some thoughtful discussions of daily water usage. Thanks for making the learning fun and full of impact!”
“I loved the hands on part of the activity. It was really engaging for students and incorporated math skills.”
“The kids loved the How much water is in the world. I appreciate that it also covered the math standard of area. Another note is that the commentator speaks at a nice slow pace which is helpful for second language learners. Excellent program!”
“I think the kids most enjoyed seeing the difference in salt and fresh water, and then the discussion about volume vs. area.”
“Eyes wide open and jaws dropping at the end of the graphing section!”
“This was a blast. The kids loved how it challenged their math and larger 'thinking skills' while also teaching about Science and the world. It was awesome. You guys rule.”
“It was a great visual and the students were very surprised to see the amount of salt water on the graph we made. I appreciate the math computations that were used to make this a successful activity!”
“The best part of this lesson was the application of math in science. Great way to incorporate area, division, multiplication, and other math skills. The visual of the results is very powerful. ”
“I love the graphing and the math involved! The end graph was shocking to look at and analyze. ”
“Thanks for all the resources that make scientific investigations so easy!”
“The kids loved it. They were very surprised at the amount of fresh water in the world compared to salt. ”
“Fantastic lesson. Kids were fully engaged in this lesson.”
“Integrating mathematics and science, environmental awareness and stewardship. The calculations using rectangles help. Division support was also needed, but as whole group, debriefing works.”
“The best part was incorporating our math lesson on area into the activity. The kids were so excited about the outcome of the maps. ”
Lesson narration:

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.
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25 mins

Wrap-Up

5 mins

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