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In this activity, learners explore their eye pupils and how they change.

free Ages 8 - 14 10 to 30 minutes
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This activity introduces the idea that computer scientists measure information by how "surprising" a message is.

free Ages 8 - 14 30 to 45 minutes
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In this activity, learners investigate the properties of different types of balls.

free Ages 8 - 11 1 to 2 hours
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In this simple activity, learners investigate refraction by placing a picture of an arrow behind a glass of water.

free Ages 8 - 14 5 to 10 minutes
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In this activity (on page 2), pairs of learners create an imaginary crime scene. One person leaves the room while the other person moves a few things around.

free Ages 6 - adult 5 to 10 minutes
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This is an activity which will allow learners to gain an understanding of lemur behavior through observation and role play.

free Ages 6 - 14 10 to 30 minutes
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In this fun math activity (page 5 of the pdf), learners will help a secret agent crack a case by solving math problems.

free Ages 8 - 11 30 to 45 minutes
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In this fun and imaginative writing assignment (page nine of the pdf), students will flex the creative side of their brains to learn more about the laws of motion and the scientific process.

free Ages 8 - 11 45 to 60 minutes
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In this online Flash game, learners will explore a coral reef using an underwater remotely operated vehicle (ROV).

free Ages 6 - 14 5 to 10 minutes
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In this game-like activity (5th activity on the page), learners explore their auditory acuity as well as the importance of having two ears.

free Ages 4 - 11 5 to 10 minutes
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In this activity, learners observe what happens when they give a light source like a neon glow lamp a "Bronx Cheer." The lights appear to wiggle back and forth and flicker when learners blow air throu

free Ages 8 - 14 5 to 10 minutes
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This activity (page 1 of the PDF under SciGirls Activity: Exercise and Memory) is a full inquiry investigation into the effects of exercise on short term memory.

free Ages 8 - 14 30 to 45 minutes
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Use this activity (10th on the page) to help learners explore memory and how sometimes your brain makes up its own memories. Learners will read and try to remember the words in list #1.

free Ages 8 - 18 5 to 10 minutes
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In this activity, learners use their imaginations and picture a scene in their heads.

free Ages 6 - 14 10 to 30 minutes
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In this simple demonstration, learners investigate the properties of air pressure. Learners place an index card on top of a glass full of water, then invert the glass.

free Ages 8 - 14 5 to 10 minutes
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How quick are your reflexes? In this online game, you are a hockey goalie defending quick slap shots. Learn about reaction time, muscle memory, and reflexes.

free Ages 8 - 14 Under 5 minutes
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In this activity, learners will explore how the voice works and feel the vibrations produced by vocal cords.

free Ages 6 - 11 10 to 30 minutes
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In this physics demonstration, learners will be surprised when a handkerchief holds water in an upside-down glass.

free Ages 4 - adult Under 5 minutes
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In this sorting activity, learners play a game in which they try to identify the largest number of differences between two objects.

free Ages 8 - 11 10 to 30 minutes
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In this outdoor activity (on page 2 of the PDF under GPS: Baseball Activity), learners will investigate the transfer of energy using sports equipment.

free Ages 8 - 14 30 to 45 minutes