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How Does Water Climb a Tree?
Source Institutions
In this activity, learners conduct an experiment to explore how water flows up from a tree's roots to its leafy crown.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-639.gif?itok=wc97pwUq)
Evolution in Plane Sight
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In this activity, learners model directed evolution by making paper fly. Learners construct and fly paper airplanes.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-364.jpg?itok=L9_x6HyB)
Fading Dot
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In this activity, learners play with a fuzzy-colored dot that has no distinct edges seems to disappear. As learners stare at the dot, its color appears to blend with the colors surrounding it.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-026.png?itok=VvNGp80V)
Wash This Way
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In this activity on page 4 of the PDF, learners investigate the importance of washing their hands.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-032.png?itok=b0aWIjmk)
Water: Clearly Unique!
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In this activity on page 4 of the PDF (Water in Our World), learners conduct some quick and easy tests to determine the differences between water and other liquids that look very similar to water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-199.gif?itok=G-LftiUo)
The Amazing Water Trick
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Using two baby food jars, food coloring, and an index card, you'll 'marry' the jars to see how hot water and cold water mix.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-714.jpg?itok=VLaNtxbd)
Chances Are: OH NO! Look Out Below for a UFO
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In this math lesson (on Page 13), learners predict and simulate the likelihood of an event occurring.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-081.jpg?itok=DDRe8pCT)
Hot Stuff!: Testing for Carbon Dioxide from Our Own Breath
Learners blow into balloons and collect their breath--carbon dioxide gas (CO2). They then blow the CO2 from the balloon into a solution of acid-base indicator.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-917.jpg?itok=1mbC869o)
Exploring at the Nanoscale
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This lesson focuses on how nanotechnology has impacted our society and how engineers have learned to explore the world at the nanoscale.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-225.jpg?itok=KofhoiWd)
Paddle Boat
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In this activity, learners build an old-fashioned paddle boat out of simple materials.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-374.png?itok=drQbeaf_)
Kites
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In this engineering/design activity, learners make a kite, fly it, and then work to improve the design. Learners explore how their kite design variations affect flight.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-198.gif?itok=EhxyukOE)
File Card Bridges
Source Institutions
With two stacks of books and a few rolls of pennies, build two kinds of bridges--a beam span and an arch span--and see how much weight each of them can hold.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-033.jpg?itok=dqs6UL45)
Does Size Make a Difference?
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In this activity on page 15 of the PDF, discover how materials and physical forces behave differently at the nanoscale.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-507.jpg?itok=CcVVHp6a)
Ziptop Bag Chemistry
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In this chemistry activity, learners perform three chemical reactions in a sealed zip-top bag. Learners will record their observations and classify the changes as chemical or physical.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-172.png?itok=UCCLKXDV)
Make Your Own Rain Stick
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This activity provides step-by-step instructions on how to build a rain stick, a musical instrument originating in South America.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-540.png?itok=HwaNpkzE)
Living Clocks
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In this activity about daily rhythms (on page 17 of the PDF), learners will explore circadian patterns in humans, animals and plants.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-411.gif?itok=bpmNj6Yj)
Rockets Away!
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In this activity, learners work in teams to construct and test fly drinking straw rockets. Learners explore how changing the rockets' fins affect flight distance.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-064.jpg?itok=QYZfWhRP)
Paper Maker
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Learners make their own paper. They start by shredding old newspaper, clean toilet paper, and clean paper towels.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-511.jpg?itok=-Ar4N6xi)
Dancing Spaghetti
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In this chemistry activity, learners use spaghetti to explore density and chemical reactions.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-024.png?itok=q0n0tI-g)
New Sense about Cents
Source Institutions
In this activity on page 6 of the PDF (Chemistry—It’s Elemental), learners explore some of the properties of copper using a few common household ingredients.