{"product_id":"gravity-a-fairy-tale-pdf-ebook-bonus-story","title":"Gravity: A Fairy Tale [PDF + eBook + Bonus Story]","description":"\u003cp\u003eWorry was named by a fairy godmother who promptly disappeared and was never seen again — which left Worry growing up in a castle of fairy-named children who could use magic, while she could not. Her optimistic sister Hope can. Their teacher, Fortitude Knightward (\"Fort for short\"), is the last remaining Scholar Knight, and after Worry runs away and discovers she'd rather be useful than left out, Fort offers her the role of caretaker of the castle's enchanted objects — which finally gets her a set of keys. What follows is a story of astronomy towers, sea riddles, a leaning castle, a bottomless pit, an astonishingly judgmental library, a dragon's lair, and gravity itself — what it actually is, how scientists have used it to find things they couldn't see, and what it might mean for a girl who has spent her whole life feeling pulled toward all the wrong things.\u003c\/p\u003e\n\u003cp\u003eWritten by Sarah Allen. Edited by Jennifer Murgia. Illustrated in color by Marie Delwart. Ages 9–12.\u003c\/p\u003e\n\u003ch2\u003eWhat's inside the book\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEighteen chapters across 187 pages of story\u003c\/li\u003e\n\u003cli\u003eTwo short conceptual explainers woven between chapters — \u003cem\u003eThe Geometry of Gravity\u003c\/em\u003e (why circles and ellipses keep showing up) and \u003cem\u003eUsing Gravity to Find the Invisible\u003c\/em\u003e (how astronomers discovered Neptune)\u003c\/li\u003e\n\u003cli\u003eTwo hands-on science activities — a tides-and-observation exercise inspired by Kepler's notebooks, and a density experiment with sand and gravel\u003c\/li\u003e\n\u003cli\u003eA pendulums activity with safety notes — figure out what does and doesn't affect a pendulum's swing using just a stopwatch and a weight on a string\u003c\/li\u003e\n\u003cli\u003eTwo guided gravity simulations using free online tools — the PhET Gravitational Force simulator and GravitySimulator.org, where you can find out what happens if Earth orbits Saturn\u003c\/li\u003e\n\u003cli\u003eA discussion question, an opening writing prompt about what gravity is, and a closing writing prompt that loops back to it after the story is done\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePlus a bonus pendulums adventure with calculations\u003c\/h2\u003e\n\u003cp\u003eBundled with the book is \u003cem\u003eAbigail's Totally Purposeful, Definitely Not Accidental or Dangerous, Adventure: A Story-Based Pendulums Exploration\u003c\/em\u003e — a separate story featuring two characters from the world of Gravity. A girl named Abigail accidentally teleports herself to an unknown underground location, and has to measure the local strength of gravity using a pendulum necklace in order to figure out how to get home.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe full illustrated story, with the math optional — students who don't want to do algebra can skip the calculation sections and still follow the plot\u003c\/li\u003e\n\u003cli\u003eA teacher guide with three adaptations for different ages and math-comfort levels — a No-Math version (ages 8–10), a Medium-Math version (ages 11–12) for students who can plug numbers into equations, and an All-the-Math version (ages 14+) for students ready for algebra\u003c\/li\u003e\n\u003cli\u003eActivity 1 — \u003cem\u003eMeasure the Strength of Gravity Where You Are\u003c\/em\u003e, a real pendulum experiment\u003c\/li\u003e\n\u003cli\u003eActivity 2 — \u003cem\u003eMake a Planetary Pendulum Necklace\u003c\/em\u003e, including a string-length table for every planet in the solar system\u003c\/li\u003e\n\u003cli\u003eThree sets of practice exercises — a Rearranging Equations Super Challenge, Pendulum Calculations practice, and a \"Guess What Planet You're On!\" set\u003c\/li\u003e\n\u003cli\u003eA full solutions manual with step-by-step worked answers for every problem\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat you'll get\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEPUB of the book (for Kindle, Apple Books, Kobo)\u003c\/li\u003e\n\u003cli\u003ePDF of the book (for any device, or for printing)\u003c\/li\u003e\n\u003cli\u003ePDF of the bonus pendulums adventure, with all activity instructions and the full answer key\u003c\/li\u003e\n\u003cli\u003eDelivered by email immediately after purchase, plus available on your download page\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart of the Fairy Tale Physics series\u003c\/h2\u003e\n\u003cp\u003eGravity is part of the Fairy Tale Physics series, but each book is self-contained and they can be read in any order. Readers of \u003cem\u003eNewton's Laws: A Fairy Tale\u003c\/em\u003e may notice a familiar face turning up somewhere around chapter fourteen.\u003c\/p\u003e\n\u003ch2\u003eAbout the author\u003c\/h2\u003e\n\u003cp\u003eSarah Allen tutored math and physics for twenty years before becoming a full-time fantasy writer. She has a physics degree from the University of Washington (graduated with college and departmental honors) and a master's in Cognition and Learning from Columbia. Her goal is to write the sort of physics books she would have wanted as a kid.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAges 9–12 · 187 pages · color illustrations · bonus pendulums story with activities, practice exercises, and full answer key\u003c\/strong\u003e\u003c\/p\u003e","brand":"Math with Sarah","offers":[{"title":"Default Title","offer_id":43745003733058,"sku":null,"price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8395\/8338\/files\/1_b6f6be8f-d0ce-4454-90e1-c2c207a31b0b.jpg?v=1778780386","url":"https:\/\/shop.mathwithsarah.com\/products\/gravity-a-fairy-tale-pdf-ebook-bonus-story","provider":"Math with Sarah","version":"1.0","type":"link"}