# Gravity – Stacking

Gravity – Stacking

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Gravity is the force that pulls objects toward the center of the Earth. Gravity can make things fall down but it can also help hold things in place. You probably have some games at home the show you a lot about the power of gravity. One of those games is Jenga – that game where you stack up the pieces of wood into a tower and then take turns sliding one of the wood pieces out of the stack. The other game is Cup Stackers – that game where you make a pyramid of the cups as fast as you can and then take it down again. The cups and the wood blocks make strong towers if the base of the tower is wide. This keeps the tower stable.

What You Need:

• Several Plastic or Paper Drinking Cups or Blocks

Build a tower by stacking the blocks or cups one on top of the other. If you are using cups, alternate them so that every other cup is upside down. The towers built from single objects stacked on top of each other don’t get very tall before they tip over do they? Now stack the cups or blocks in a pyramid. Depending on how many cups or blocks you have, the pyramid tower can get pretty tall without tipping over. This is because the weight of the cups or blocks is distributed across a wide base. It’s kind of like the difference between balancing on one foot or balancing on two feet. The wider the base, the more weight that can be supported before gravity will pull an object or stacked objects down.

Here are some websites and books that will help you explore gravity:

Words to Know:

Gravity – The force that pulls everything toward the center of Earth; the force of gravitation on Earth.

Weight – A measure of the force of gravity upon an object

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# Robot Dreams

Robot Dreams

The enduring friendship between a dog and a robot is portrayed in this wordless graphic novel.

Dog builds a robot from a kit and after visiting the library to find out where dog beaches are, they go to the beach. Robot jumps into the water and then rests on a towel. Oh no, he rusts solid! Dog doesn’t know what to do. He goes home alone and when he comes back, the beach is closed. Dog can’t get robot out. Over the winter, robot has dreams about better times while Dog looks for other friends. There are no words in this book. Check out ROBOT DREAMS to find out what happens to Dog and Robot.

Recommended by: Mary Sullivan, Decatur Branch

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# Trivia Facts and Records

Trivia Facts and Records
• The solar system is in orbit around the center of the Milky Way.
• We’re mov¬ing at about 483,000 miles an hour.
• The sentence “The quick brown fox jumps over the lazy dog,” uses every letter in the alphabet.
• A ladybug in flight beats its wings up to 85 times per second.

Find facts and trivia about nature, sports, human oddities and more in these books that will make you believe it…or not!

Selected by: Janet Spaulding, Selection Services

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Watch The Mystery of the Missing Organizer - Being a detective, I have to see everything. So I always arrive ten minutes early. That’s what Bernstein’s Manual says. Follow Bernstein’s manual with Half Moon to solve The Mystery of the Missing Organizer.

Watch The Mystery of the Missing Dictionary - You all know that Wimpy Kid Greg Heffley. He’s got a mystery in his classroom that needs clearing up. Can Greg help, or will he just make it worse? You be the judge

Watch Private I Guana - Leon the chameleon is missing! But Ace Detective Private I. Guana is on the case. This engaging adventure will tickle your funny bone.

Read Dinosaur Detectives - This introduction to paleontology weaves together facts about fossil hunting with fictionalized first-person accounts from dinosaur detectives.

Read Clueless McGee – Through a series of letters to his father, a private investigator, fifth-grader PJ “Clueless” McGee tells of his efforts to discover who stole macaroni and cheese from the school cafeteria.

Local seventh-grade sleuth Samantha “Sammy” Keyes is not an easy kid to get a hold of. If she’s not putting out fires or planting baby-monitor listening devices, shes not tracking down missing valuables, then she’s running from the law herself! See if you can solve one of her cases: Sammy Keys Casebook

 MysteryNet; A-Z Mysteries

 A-Z Mysteries Who Dunnit Mystery Book Club A-Z Mysteries Missing Piece of Evidence A-Z Mysteries Crack the Code

Read Mystery in Midair – Never Fear…Detective Mickey is Here! Flight 815 has disappeared into thin air carrying a planeload of passengers and a shipment of precious jewels worth millions of dollars! The police have no leads or suspects, and they’re getting nowhere fast…until ace detectives Mickey and Minnie join the investigation. Can they get to the bottom of the high-altitude mystery before another plane disappears. Disney Digital Books are ALWAYS AVAILABLE for checkout with your IndyPL Library Card. See books below for more downloadable eBooks and Audiobooks.

Read Mystery of the Secret Treasure – Dig a Good Mystery?
Mickey and Minnie want to like Clarabelle’s new friend. But they just can’t shake their suspicions that he’s up to no good. Then Clarabelle discovers her late grandfather’s diary, with directions to his secret buried treasure. Could Clarabelle’s friend be after her grandfather’s gold? And can Mickey and Minnie dig up the truth before Clarabelle ends up hurt–and penniless? Disney Digital Books are ALWAYS AVAILABLE for checkout with your IndyPL Library Card. See books below for more downloadable eBooks and Audiobooks.

Read The Mystery of the Garbage Gang – Extra! Extra! Detective Mickey is on a Case! Something fishy is going on. The local newspaper is receiving threatening letters and phone calls, and Mickey and Minnie have been hired to get to the bottom of it. The daring detectives decide to go undercover as investigative reporters to get the real scoop. Disney Digital Books are ALWAYS AVAILABLE for checkout with your IndyPL Library Card. See books below for more downloadable eBooks and Audiobooks.

Read Tink and the Messy Mystery - It’s up to Tink to solve the mystery of the mess in Pixie Hollow. Disney Digital Books are ALWAYS AVAILABLE for checkout with your IndyPL Library Card.

Read: Disney Donald’s Lost Lion - Oh, no! Donald has lost his toy lion and can’t fall asleep without it. Mickey helps him search everywhere. Pete is also very sad because he lost his toy, too! What happens next? Disney Digital Books are ALWAYS AVAILABLE for checkout with your IndyPL Library Card.

Read: Lizzie Maguire in the Doghouse - A Doggone Mystery! To raise money for an animal shelter, Lizzie starts her own dog-walking and dog-sitting business. The idea is such a good one that cheerleaders Kate and Claire are furiously jealous–since their own lame pom-pom fundraiser is a total failure. In fact, Lizzie gets so much business she has to collar Miranda and Gordo to help! Then someone deliberately lets the dogs out of the McGuires’ backyard, and Lizzie is howling mad. Can she track down the lost dogs (including Vice Principal Putney’s pedigree pup) and sniff out the guilty party before she ends up in the doghouse?

Read: Minnie Mysteries The Flower Prowler - What happened to Minnie’s daffodils? The stems are still standing, but the flowers are gone. Join Minnie and Daisy as they follow the clues, put the pieces together, and unravel the mystery of the disappearing daffodils.

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# Chromatography – Black Ink

Chromatography – Black Ink

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Black ink is black, right? Today you are going to find out. In this experiment you will be able to see all of the dye colors that mix together to make black ink.

What You Need:

• Paper Towel or Coffee Filter
• Bowl
• Water
• Several different kinds of black markers

Cut strips from the paper towel about 1 inch wide – one for each type of marker. Scribble across the bottom of one of the paper towel strips with each kind of marker. Scribble about one inch from one end of the paper towel strip. Tape the OTHER end of the strip to the maker you used to scribble on that strip. That will help you remember which marker goes with each paper towel strip.

Now hang the paper towel strips above the bowl of water so that only a little bit of the scribble end is in the water. Do not submerge the pen scribbles! Check on the paper towels in an hour. What has happened to the pen marks?

What you see happening on the paper towel strips is called chromatography. The color of the ink in markers is made by mixing different pigments together. A pigment is a substance that makes color, like ink or dye. To make black, several pigments are mixed together. When the end of the paper towel strip is submerged in water the water soaks up through the paper towel. When the water passes through the black ink marks it takes the pigment colors with it. Different colors of pigments travel with the water at different rates because the molecules of some pigments stick to the paper more strongly than others. So, as the water travels it separates the colors. This is called chromatography – separating the parts of a mixture so that you can see them one at a time. It looks like there is more than one way to make black!

Here are websites and books that will help you understand solutions and experiment with chromatography:

Mixtures and Solutions Chromatography (pages 34-38)

Words to Know:

Chromatography - A process that separates a mixture by passing it through something that will separate its parts.
Mixture – A substance made by mixing two or more substances together. The molecules of the substances don’t join together so the substances can be easily separated.
Homogeneous Mixture – A type of mixture that is the same throughout. Salt water and ink are good examples.
Pigment - A substance used for coloring; ink, dye, etc.

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