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Caution! Wildlife Crossing
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In this design challenge, learners use their creativity and imagination to design and test a wildlife crossing for their favorite animal.
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Basking Basics
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In this activity, learners will explore reptile biology by taking temperature readings in various places and comparing them.
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Earth's Energy Cycle: Albedo
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In this activity, learners experiment and observe how the color of materials that cover the Earth affects the amounts of sunlight our planet absorbs.
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Whirling Windmills
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In this activity, learners are challenged to design and construct a windmill to harness the power of wind.
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Animal House
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The goal of this activity is to design, build and test a house or toy for an animal.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-314.jpg?itok=5Pcs7Kc-)
Hidden Color Chemistry
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In this activity, learners will discover what colors are in different markers, and may be surprised at the results.
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Our Beautiful World
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In this Bob the Builder(TM)-themed activity, learners go on a nature walk outside and describe what they observe using their senses.
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Solar Powered Cooking
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In this activity, learners make a solar oven. Learners witness the awesome power of the sun to make a yummy treat--a chocolate chip cookie!
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Wrap It Up!
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In this Energy and Environment activity (page 9 of the PDF), learners calculate the mass of a piece of gum, compare it to the mass of the gum's packaging, and then create a bar graph of the results.
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Trash Traits
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In this activity on page 24, learners perform experiments to examine whether or not trash can float, blow around, or wash away.
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The Desert Blooms!
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This activity attempts to clear up the common misconception that deserts are always hot, totally dry, and uninhabitable.
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Aviary Architect
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In this activity, learners are challenged to design, build and test a birdhouse that will stay cool in the sun.
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The Web of Life
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In this activity, learners examine ways that Native Americans of the Southwest express their relationship with nature through art.
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Build a Coral Polyp
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In this activity, learners build one or more edible coral polyps and place them together to form a colony.
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Tiny Geyser Models
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In this activity (located on page 2), learners will construct tiny model geysers out of film canisters, warm water, and antacid seltzer tablets.
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Food Webs
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In this activity, learners construct possible food webs for six different ecosystems as they learn about the roles of different kinds of living organisms.
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Edible Soil
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In this yummy activity about soil (page 9 of PDF), learners will create layers of soil using food. They will learn about the composition and role of each layer.
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Bird Feeder Challenge
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In this activity, learners are challenged to build a bird feeder using recycled materials from home and are encouraged to problem solve during the extensions.
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Where the Buffalo Roam
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In this activity, learners explore the Great Plains.
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Zany Zen Garden
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In this activity, learners will turn an ordinary tray of sand into a desk-top garden for meditation.