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Model the carbon cycle and its principal reservoirs and flow rates using rice.
Make dendritic diversions and bodacious branches.
A fun way to visualize gas molecules in constant motion.
Eggsplore gas properties while making a snack.
Use electricity to separate colored dyes.
Just spew it—build your own cyclic hot water fountain.
A lens creates an image that hangs in midair.
A magnet falls more slowly through a metallic tube than it does through a nonmetallic tube.
Use magnets to model the motion of electrons.
Etch patterns on metal using saltwater and electricity.
Start your own electric flea circus.
Change the measured weight of an object—without touching it.
Build an electroscope to detect electrical charge using straws.
Construct a simple hydrometer to compare the densities of solutions.
Now you see it; now you don’t—an object without a sharp edge can fade from your view.
Prove to yourself that Galileo was right.
“g,” that’s interesting! Investigating gravity.
Listen to the rhythm of falling weights.
Boundaries are the gift that keeps on sifting.
Dark-colored materials absorb and emit energy more readily than light-colored materials.
Different kinds of light can be used to study life.
Why is the sky blue? That's a sticky question.
Without a boundary, it’s hard to distinguish different shades of gray.
Make a record player with a pencil, pin, and paper.
Use your skin and different metals to create a battery.
Make the liquid in this toy rise and fall in a cycle.
Measure the height of an object indirectly using your hand and a ratio.
Use electricity to break water into its elemental components.
Wrap a string around your head and pluck to play music.
Find the height of a tree, paper rocket or North Star.
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