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Why is My Shadow Shorter Sometimes and Longer Other Times?

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Earth & Space Science
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Explore Smithsonian: How Are Optical Instruments Tested Before Space Flight?

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Earth & Space Science
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Life Cycle of Butterflies– Lesson 2: Caring for Caterpillars

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Life Science
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Sound– Lesson 6: Vibrations We Can't See

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Kindergarten
Physical Science
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Experimenting with Mixtures, Compounts, and Elements– Marking Chromotography Paper

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Physical Science
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Sound– Lesson 10: Changing the Pitch by Changing the Tension

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Physical Science
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Explore Smithsonian: Dr. Avi Loeb - Jr. Professor of Science

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Education
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Understanding Weather and Climate– Lesson 1: Our Ideas About Weather and Climate– Save Weather Maps

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Earth & Space Science
Composite image of stars from the Chandra X-ray Telescope
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Explore Smithsonian: How Do Astronomers See the Invisible Parts of the Universe?

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Exploring Planetary Systems– Other Surface Features: Don't Hurry the Slurry

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Earth & Space Science
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Life Cycle of Butterflies– Lesson 3: Learning More About Caterpillars

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Ecosystems– Material Consideration

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Explore Smithsonian: How do Orchids Attract Pollinators?

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Sound — Lessons 1-4: Materials

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Physical Science
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Floating and Sinking– Which Things Float? Which Things Sink?

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Kindergarten
Physical Science
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Rocks and Minerals– Lesson 3: Learning More about Rocks

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Earth & Space Science
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Sound– Lesson 8: Making a Model Eardrum

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Life Cycles of Butterflies– Lesson 8: Observing the Crysalis - Moving the Crysalis Properly

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Life Science
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Organisms– Notebooking

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Life Science
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Explore Smithsonian: How do Scientists use Electricity to Study Fish Populations?

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Life Science
Sustainability
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Elementary Weather Lesson

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Plant Growth and Development–Getting a Handle on Your Bee

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Understanding Weather and Climate– Lesson 7: Hurricanes- Destructive Storms

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Earth & Space Science
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Rocks and Minerals– Organizing Minerals

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Exploring Properties of Matter– Other Surface Features

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Physical Science