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Dry Ice Comet
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In this activity, dry ice and other items are used to construct a demonstration model of a comet that illustrates the comet nucleus, coma, and tails.

DNA Modeling Activity
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Using pipe cleaners, straws, and beads, learners explore the building blocks of life by creating their own model of DNA.

Going for a Spin: Making a Model Steam Turbine
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In this activity, learners explore how various energy sources can be used to cause a turbine to rotate.

Build Your Own Robot Arm
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In this lesson, learners develop a robot arm using common materials. Learners explore design, construction, and teamwork, as well as materials selection and use.

Gumdrop Dome
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In this activity (located on pages 23-24 of the PDF), learners are introduced to structural engineering and encouraged to practice goal-oriented building.

The Pull of the Planets
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In this activity, learners model the gravitational fields of planets on a flexible surface.

Space Stations: Sponge Spool Spine
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In this activity, learners simulate what happens to a human spine in space by making Sponge Spool Spines (alternating sponge pieces and spools threaded on a pipe cleaner).

Lung Capacity
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This is an activity about lung capacity. Learners will measure their own lung capacity using a homemade spirometer.

Erosion and Floods
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In this activity, learners create models of erosion and floods and learn to recognize both in their environment.

Catapult
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In this activity, learners construct their own small catapults using simple materials. Learners follow visual instructions to build their launching device.

Make a Balloon-powered Nanorover
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In this activity, learners build a nanorover model using styrofoam meat trays and a balloon.

Strengthen a Paper Bridge
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In this quick activity (page 1 of the PDF under SciGirls Activity: Tug O' War), learners will test how many pennies a flat paper index card bridging the gap between two stacks of books is able to supp
Soaring Towers: Building with Recycled Materials
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In this activity, learners will build the highest tower they can out of recycled materials.

Bottle Cars
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In this activity, learners explore motion, energy, and electricity by constructing bottle cars that run on motors.

Morning Star and Evening Star
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This demonstration activity models how Venus appears from Earth.

Rooftop Gardens
How does a green roof, or roof covered by plants, affect the temperature of the inside and outside of a building? Learners design and build houses to find out the answer.

Jiggly Jupiter
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In this activity, learners build edible models of Jupiter and Earth to compare their sizes and illustrate the planets' internal layers.

Toilet Model
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In this activity, PVC pipe, plastic water bottles and vinyl tubing are used to make a simple working toilet model. The model shows the role of a siphon in the flushing of a toilet.

3...2...1 Puff!
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In this activity, learners build small indoor paper rockets, determine their flight stability, and launch them by blowing air through a drinking straw.

Stream Table
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In this activity, learners use aluminum trays and wooden blocks to form stream tables to investigate river formations in two different landscape scenarios.