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Spring Scale Engineering
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In this activity, learners explore how spring scales work and how they are used for non-exact weight measurement.

A Question of Balance
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In this activity, learners explore how engineers use scales and measures when designing a manufacturing process to ensure that final products are uniform in weight or count.
Sea State: Forecast Conditions at Sea
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In this oceanography and data collection activity, learners cast real time sea state conditions using buoys from NOAA's National Data Buoy Center.

Perspectives: Powers of 10
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In this activity, learners complete a series of drawing activities to explore scale and powers of 10. Learners first trace each other on 1-meter-square pieces of paper.
Forwards and Backwards: pH and Indicators
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Visitors prepare six solutions combining vinegar and ammonia that range incrementally from acid (all vinegar) to base (all ammonia).

Inkjet Printer
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In this activity, learners investigate how inkjet printers produce tiny, precise drops of ink.

Model Wind Tunnel
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In this activity, learners build a miniature wind tunnel to measure force. Learners construct the model out of Lexan plastic, a fan, and a precise digital scale.

Slide Rules
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Learners make their own simple slide rules out of paper and learn how they work.

Size Wheel
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In this fun sticker activity, learners will create a size wheel with images of objects of different size, from macroscopic scale (like an ant) to nanoscale (like DNA).

Gravity Fail
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In this activity, learners try pouring water out of a regular cup and a miniature cup. It’s harder than it sounds! Learners discover that different forces dominate at different size scales.

Blow-and-Go Parachute
Learners make a skydiver and parachute contraption and launch it. They see that the drag created by air resistance slows the descent of skydivers as they travel back to Earth.

What am I?
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In this activity, learners examine nanoscale structures of common things.

Mitten Challenge
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In this activity, learners try to put together toy bricks—wearing oven mitts on their hands! This activity shows learners how difficult it is to build small things when your tools are too big.

Shake it up with Seismographs!
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In this activity, learners explore the engineering behind seismographs and how technology has improved accurate recording of earthquakes.

Bike Wheel Zoetrope
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In this activity (posted on April 18, 2011), learners follow the steps to construct a zoetrope, a device that produces an illusion of action from a rapid succession of static pictures, using a 16" bik

Working with Wind Energy
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In this activity, learners explore how wind energy can be generated on both a large and small scale.

Stabilization Wedges Game
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This game introduces learners to the scale of the greenhouse gas problem, plus technologies that already exist to dramatically reduce our carbon emissions and prevent climate change.