An Invisible Pull<br />Aimee Stout<br />Standard number 3-The physical setting<br />Indicator number 5.6.3<br />
Science standard 3- Students continue to investigate changes of earth and sky. They explore, describe, and classify materials, motion, and energy. <br /><ul><li>Indicator 5.3.6- demonstrate that things on or near the Earth are pulled toward it by the Earth’s gravity.
Taken from: http://dc.doe.in.gov/Standards/AcademicStandards/StandardSearch.aspx
Link to activity: http://www.indianastandardsresources.org/files/sci/sci_5_3_pull.pdf</li></li></ul><li>Definitions<br />Gravity- The force of attraction by which objects tend to be pushed toward the center of the earth.<br />Force- A push or pull on an object<br />Push- to press upon or against an object with force in order to move it away. <br />Pull- to draw or haul toward oneself, in a particular direction.<br />
Background information<br />Questions to think about:<br /> Why does the rain fall down?<br />Why don’t we float like we are on the moon?<br />What makes the water in the faucet fall downward?<br />What happens when you drop an object?<br />
Materials needed<br />Paper and pencil<br />Chalkboard eraser<br />Paper (not for writing)<br />Yard stick<br />
Activity<br />Put the eraser on your desk.<br />Questions to think about: <br />Can the eraser move itself?<br />What must happen for the eraser to move? <br />*Test ways to make your eraser move. Write down what you try.<br />Did you have to push or pull your eraser to move it?<br />
Activity<br />That push or pull is called force.<br />Grab your eraser. What would happen if you let it go?<br />Drop your eraser. <br />Why did your eraser fall?<br />There must have been a force that caused your eraser to fall.<br />Did you push your eraser to the floor??<br />
Activity<br />Since you didn’t push your eraser, what pulled your eraser to the floor?<br />Gravity is the force that pushed your eraser to the floor. <br />What caused this apple to fall on<br /> the mans head in this picture?<br />
Extension activity <br />Now try dropping the piece of paper.<br />Does the same thing happen?<br />Using your yard stick, you are going to drop the eraser and paper at the same time at the top of your yard stick. But first:<br />Predict which will hit the floor first-write down your answers.<br />Why do you think this?<br />Which one actually hits the floor first?<br />How did gravity cause this?<br />
Review questions<br /><ul><li>If you are sitting on a tree limb that breaks, what will happen?</li></ul>How do you know?<br />Why don’t airplanes float into space?<br />When something is dropped, can you see the force that pushes it down?<br />
Resources<br />Department of education website- http://dc.doe.in.gov/Standards/AcademicStandards/StandardSearch.aspx<br />Link to activity- http://www.indianastandardsresources.org/files/sci/sci_5_3_pull.pdf<br />Definitions-<br />http://www.dictionary.reference.com<br />
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