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Physics of Toys Open House
A free event at COSI for PreK-3 teachers, December 8th
 Join us on Saturday, December 8, from 10am – 1pm for COSI's free "Science of the Season: Physics of Toys" Open House.
Explore COSI, tour Bob the Builder - Project: Build-It, talk with COSI faculty about classroom activities, see a movie on the Extreme Screen, and take home lessons that align with PreK-3 standards! Learn more. |
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Last Month's Quick Poll
Winners: Two watery adventures and a journey into antiquity
In November, we asked you which giant screen film you would consider for your students based on title alone. The winner was "Coral Reef Adventure," with "Greece: Secrets of the Past" and "Great Lakes" tied for second place.
We've combined your feedback with that from other audiences to select "Greece: Secrets of the Past" to open on COSI's 7-story Extreme Screen on January 2, 2008. Add this breathtaking film to your COSI field trip for just $3.50 per student. "Greece: Secrets of the Past" will run at COSI through June 6, 2008.
The complete results:
Coral Reef Adventure - 29%
Greece: Secrets of the Past - 24%
Great Lakes - 24%
Sea Monsters - 18%
Fly Me to The Moon - 6%
The Alps - 0%
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Give the Gift of a COSI Membership
Give your friends and family a gift that lasts all year long!
 Purchase a COSI gift membership by calling 614.228.2674 or order online by December 12th to ensure delivery before the holidays. Or purchase at COSI through December 23rd.
There’s no need to wrap your gift – receive a free COSI drawstring backpack when you purchase a gift membership (while supplies last). |
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Spend the night at COSI
Take an Overnight Field Trip and explore all COSI has to offer!
COSI's Overnight Field Trips include our exhibition areas, live shows, an Extreme Screen film, and special discovery-based workshops. It's the ultimate way for your group of grade 3-6 students to focus on science standards. Offered February 14, 28, and March 13, 2008. Learn more. |
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| Classroom Activity for Grades 1-4 |
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Freeze dry your holiday leftovers!
Turn your holiday leftovers into a science experiment focusing on states of matter.
Materials
Tray (like a cooling rack); fruit like apples or pears, or vegetables like potatoes or carrots; cutting board and knife (CAUTION: use adult supervision.)
Do This!
1. With adult supervision, cut your fruit or vegetable as thin as you can; paper thin if you can do it. The thinner you cut, the less time the experiment will take. Then arrange your slices on your rack or tray and put them in the freezer. You want to do this fairly quickly, or your potato and/or apple slices will discolor.
2. In half hour, look in on your experiment. The slices should be frozen solid. Over the next week, examine your slices. What do your slices look like? With an adult’s permission, taste your experiment. What do your slices taste like?
What’s Going On?
After your slices are frozen, the water in the slices will sublimate away. The water in the slices will convert straight from solid water (ice) to water vapor, never going through the liquid state. This is the same thing that mothballs and dry ice do, going straight from a solid to a gaseous state.
After a week or so (depending on how cold your freezer is and how thick the slices are) your slices will be completely dry. To test apple or potato slices for complete drying, take one slice out and let it thaw. It will turn black almost immediately if it is not completely dry.
When all of the slices are completely dry, you've made freeze-dried fruits and vegetables. You can "reconstitute" them by putting the slices in a cup or bowl and adding a little boiling water (or add cold water and microwave.) You can also eat apples in their dried state. Notice that your reconstituted vegetables look and taste pretty much like the original! That's why freeze-drying is a popular preservation technique.
Relevant Ohio Science Content Standards
Physical Sciences: 1.3, 4.1, 4.4, 4.5
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