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    In this online Flash game, learners will explore a coral reef using an underwater remotely operated vehicle (ROV). Faced with concerns that environments around the world might be undergoing rapid...

    free Ages 6 - 14 5 to 10 minutes
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    Twin Cities Public Television
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    This activity (on page 2 of the PDF) is a full inquiry investigation into the engineering challenges of sending scientific sensors into space. Groups of learners will develop sensors to be deployed...

    Over $20 per group Ages 8 - 14 1 to 7 days
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    Twin Cities Public Television
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    This activity (on page 2 of the PDF) is a full inquiry investigation into hovercraft engineering and design optimization. Groups of learners with access to power tools and a wood shop will build a...

    Over $20 per group Ages 8 - 14 1 to 7 days
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    Twin Cities Public Television
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    In this quick activity (located on page 2 of the PDF), learners will see the effects of convection and understand what makes hot air balloons rise. Learners will fill a bottle with hot water...

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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    Twin Cities Public Television
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    In this online Flash game, learners will captain a sailing challenge, adjusting boat direction and sails, seeking the way to take greatest advantage of varying wind speeds and directions to catch...

    free Ages 6 - 14 5 to 10 minutes
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    In this online Flash game, learners take to the skies in a hot air balloon and are challenged to beat other balloonists' times to the finish line without crashing. Learners use their knowledge...

    free Ages 6 - 14 5 to 10 minutes