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科学

Uninvited Guests: Invisible Creatures Lurking in Your Home

3-9 ┊ 2181 words ┊ ◄)) 3-9, 2181 words, 19 minutes audio time. Your parents may be gone, but you're still not home alone. From sneeze causing mold to fabric eating moths, take a look at the tiny …
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re***n318年8月13日
Yard Monsters: Invisible Creatures Lurking in Your Backyard

3-9 ┊ 2205 words ┊ ◄)) 3-9, 2205 words, 20 minutes audio time. Squirrels, skunks, and stray cats aren't the only creatures creeping around in your backyard. From plant eating fungi to root gobbli…
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re***n318年8月13日
The Story Behind Coal

3-5 ┊ 3439 words ┊ ◄)) 3-5, 3439 words, 30 minutes audio time. Why is coal a rock that burns? How did coal form? When was coal first mined? To uncover the hidden facts behind everyday things, explore …
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re***n318年8月13日
The Story Behind Glass

3-5 ┊ 3284 words ┊ ◄)) 3-5, 3284 words, 26 minutes audio time. How does lightning form glass? What is obsidian? How is glass recycled? To uncover the hidden facts behind everyday things, explore the s…
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re***n318年8月13日
The Story Behind Maps

3-5 ┊ 3343 words ┊ ◄)) 3-5, 3343 words, 27 minutes audio time. Who were the first mapmakers? What was the Vinland Map? How will maps change in the future? To uncover the hidden facts behind everyday t…
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re***n318年8月13日
The Story Behind Paper

3-5 ┊ 3259 words ┊ ◄)) 3-5, 3259 words, 26 minutes audio time. When did the ancient Chinese begin using paper? How did the Industrial Revolution change the paper industry? How is paper recycled? To un…
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re***n318年8月13日
The Story Behind Plastic

3-5 ┊ 3209 words ┊ ◄)) 3-5, 3209 words, 25 minutes audio time. What are plastics made of? What is Teflon? How is plastic recycled? To uncover the hidden facts behind everyday things, explore the secre…
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re***n318年8月13日
The Story Behind Rubber

3-5 ┊ 3264 words ┊ ◄)) 3-5, 3264 words, 26 minutes audio time. What was the first civilization to use rubber? How did rubber use develop over the years? What is neoprene? To uncover the hidden facts b…
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re***n318年8月13日
The Story Behind Silk

3-5 ┊ 3101 words ┊ ◄)) 3-5, 3101 words, 23 minutes audio time. How is silk made? Why was the secret of silk kept for so long? What was the Silk Road? To uncover the hidden facts behind everyday things…
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re***n318年8月13日
The Story Behind Soap

3-5 ┊ 3138 words ┊ ◄)) 3-5, 3138 words, 23 minutes audio time. Where does the word "soap" come from? What are the active ingredients in soap? How was soap used in the Middle Ages? To uncover…
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re***n318年8月13日
The Story Behind Water

3-5 ┊ 2972 words ┊ ◄)) 3-5, 2972 words, 23 minutes audio time. What is water? What are the three forms of water? How can we conserve water for the future? To uncover the hidden facts behind everyday t…
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re***n318年8月13日
The Story Behind Wool

3-5 ┊ 3287 words ┊ ◄)) 3-5, 3287 words, 24 minutes audio time. What are the different types of wool? How was wool used in Medieval Times? What is the future of wool? To uncover the hidden facts behind…
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re***n318年8月13日
Clouds

PreK-2 ┊ 207 words ┊ ◄)) PreK-2, 207 words, 3 minutes audio time. See their shapes. Watch for a thunderstorm. It's time to learn about clouds. READ
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re***n318年8月13日
Lightning

PreK-2 ┊ 191 words ┊ ◄)) PreK-2, 191 words, 2 minutes audio time. Watch it light up the sky. Hear its booms. It's time to learn about lightning. READ
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re***n318年8月13日
Rain

PreK-2 ┊ 195 words ┊ ◄)) PreK-2, 195 words, 3 minutes audio time. Jump in a puddle. Carry an umbrella. It's time to learn about rain. READ
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re***n318年8月13日
Sunlight

PreK-2 ┊ 247 words ┊ ◄)) PreK-2, 247 words, 3 minutes audio time. Put on sunglasses. Feel its warmth. It's time to learn about sunlight. READ
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re***n318年8月13日
Wind

PreK-2 ┊ 186 words ┊ ◄)) PreK-2, 186 words, 3 minutes audio time. Fly a kite. Watch leaves swirl. It's time to learn about wind. READ
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re***n318年8月13日
Bug Babies

PreK-1 ┊ 187 words ┊ ◄)) PreK-1, 187 words, 3 minutes audio time. Books in this series introduce readers to the exciting world of insects and arachnids. Each title uses simple text and vibrant photogr…
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re***n318年8月13日
Bug Food

PreK-1 ┊ 144 words ┊ ◄)) PreK-1, 144 words, 3 minutes audio time. Books in this series introduce readers to the exciting world of insects and arachnids. Each title uses simple text and vibrant photogr…
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re***n318年8月13日
Bug Homes

PreK-1 ┊ 159 words ┊ ◄)) PreK-1, 159 words, 3 minutes audio time. Books in this series introduce readers to the exciting world of insects and arachnids. Each title uses simple text and vibrant photogr…
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re***n318年8月13日
Bug Parts

PreK-1 ┊ 140 words ┊ ◄)) PreK-1, 140 words, 3 minutes audio time. Books in this series introduce readers to the exciting world of insects and arachnids. Each title uses simple text and vibrant photogr…
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re***n318年8月13日
Bug Senses

PreK-1 ┊ 209 words ┊ ◄)) PreK-1, 209 words, 3 minutes audio time. Books in this series introduce readers to the exciting world of insects and arachnids. Each title uses simple text and vibrant photogr…
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re***n318年8月13日
Bugs on the Move

PreK-1 ┊ 142 words ┊ ◄)) PreK-1, 142 words, 3 minutes audio time. Books in this series introduce readers to the exciting world of insects and arachnids. Each title uses simple text and vibrant photogr…
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re***n318年8月13日
All About Boats

PreK-2 ┊ 506 words ┊ ◄)) PreK-2, 506 words, 4 minutes audio time. Take an interesting look at all kinds of boats, from early canoes to powerful icebreakers to boats of the future. READ
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re***n318年8月13日