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litgirl2 litgirl2 is offline
 
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Lessons on Matter
Old 10-18-2010, 03:30 PM
 
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We have a new unit to teach for fourth grade on matter. Anyone have any great ideas for matter for fourth graders that would be hands on and FUN? Many thanks,
Shar


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1956BD 1956BD is offline
 
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Matter Experiment
Old 10-19-2010, 06:17 PM
 
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Start with a solid by giving each student an ice cube in a snack size baggie.

Ask how you can change it to a liquid. Remind them not to take it out of the bag, tear the bag or put the bag in their mouths. I live in Texas and we do this experiment in early September, so my students always say let's go out in the sun. So if the weather agrees and outside experimentation is an option, that always makes it more fun for your students.

Tell students to come see you when they have a liquid. Open the baggie and add a half Alka Seltzer tablet and zip the bag back up.

When the baggie begins to expand ask your students why. Also ask them if they now think gas takes up space.

I buy generic Alka Seltzer and it works fine. Snack size baggies give a more dramatic effect as they are smaller. I have done this the last two years and have not had a baggie blow up as yet. I would have a couple of extra baggies with water ready if needed. Some baggies spring a leak and then the gas escapes and students are very disappointed.
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Matter
Old 10-21-2010, 05:24 AM
 
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My 3rd graders make Oobleck & Gak and then have to explain whether they're a liquid or a solid and why they believe their answer is right. Then I show them the Mythbusters clip where they make Oobleck and talk about Non-Newtonian fluids.
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bee bees
Old 10-23-2010, 12:50 PM
 
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Get three petri dishes. Fill the bottom of one so they barely move. Put less in the second and very few in the last. Put them on the overhead and show how the bb's just vibrate in the "solid" or full one, move more in the "liquid" and finally a LOT in the "gas."
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Old 09-15-2012, 02:04 PM
 
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That is such a great idea. Simple, yet effective. TY


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