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Welcome to Masses of Materials in Objects`

Welcome to Masses of Materials in Objects`. Ms. Lanigan Grade 5A January 28 th , 2013. Here are your Outcomes students are expected to:.

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Welcome to Masses of Materials in Objects`

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  1. Welcome toMasses of Materialsin Objects` Ms. Lanigan Grade 5A January 28th, 2013

  2. Here are your Outcomesstudents are expected to: follow a given set of procedures to relate the mass of a whole object to the sum of the mass of its parts, and suggest possible explanations for variations in the results describe examples of manufactured materials that have been developed to improve their living conditions identify the source of the materials found in an object, and use a variety of sources and technologies to gather information to describe the changes to the natural materials required to make the object

  3. BEFORE WE BEGIN….

  4. Do you know the difference between mass and weight?

  5. Let’s compare!Please write these definitions down on sheet provided: MASS WEIGHT • Mass is a measure of how much matter is in an object. • Weight is a measure of how much gravity is pulling on the object.

  6. But Wait (pun intended!)

  7. Gravity is a force that affects us all the time. When you stand on a bathroom scale, it tells you how much you weigh. It doesn't tell you how much mass you have.

  8. A weight scale measures how much force is pushing down on it. When you stand on it, it measures how much gravity is pulling down on you while you are pushing down (in other words, standing) on it.

  9. If you could go to the moon and stand on your bathroom scale, you would find that you weigh much less than you do on Earth, because there would be less gravity pulling down on your body as you stand on the scale.

  10. Check out these videos on ways to measure mass: http://www.youtube.com/watch?v=FEvMAnw1bjw http://www.youtube.com/watch?v=CUexAhUcx_8 • http://www.youtube.com/watch?v=m-RW2A3oPSE • http://www.exploratorium.edu/ronh/weight/

  11. Now it’s your turn to make a balance….Follow the procedures on how to make your own balance and find out the mass of different objects. Usually a scale uses grams for lighter objects and kilograms for heavier objects. With your scale you can use anything to compare! Good luck! Use your sheet provided to record observations. *What did you discover?*

  12. Mass During a Change of State • ICE Activity (textbook pg.34) Questions: Is the mass of an ice cube the same when it is melted? What happens to the mass of a substance as it changes from a solid to a liquid to a gas?What was the mass of the ice cube before the change of state? What was the mass after it melted? What are your observations and conclusions? Remember to use a source of measurement such as blocks as your base measurement to compare.

  13. Mass During a Chemical Reaction • Baking Soda and Vinegar Activity (textbook pg.34 &35) 1 tsp of baking soda in corner of ziploc bag, seal with a twist tie, then add 10ml of vinegar to the bag and seal. DO NOT MIX ingredients until first measurement takes place. After you measure, remove twist tie and mix ingredients. Record observations after the reaction , measure again (include twist tie!) Questions: What was the mass of the bag and materials before the reaction? What was the mass after the reaction? Remember to use a source of measurement such as change or blocks as your base measurement to compare.

  14. Observations • Complete your sheets and note any observations or conclusions.

  15. Other Information of Interest…

  16. A Canadian Favorite(textbook pg 36 to 39) • A lot of science goes into making a piece of gum! • Check out this video for more information! • http://www.youtube.com/watch?v=JAQ5xhdK7zI

  17. Thanks for listening!Ms. L

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