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This is an activity (located on page 131 of the PDF) related to sleep and circadian rhythms as well as space travel.

free Ages 8 - 18 45 to 60 minutes
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In this activity, learners conduct a simulation exercise related to public key encryption and try to intercept a message sent between two learners.

free Ages 11 - 18 30 to 45 minutes
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In this online activity, learners adjust mountain snowfall and temperature to see how glaciers grow and shrink. They will use scientific tools to measure thickness, velocity and glacial budget.

free Ages 8 - adult 10 to 30 minutes
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Did you know that you would be a different age if you lived on Mars? It's true!

free Ages 8 - 18 10 to 30 minutes
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In this activity, learners measure and calculate the amount of cubic feet various containers contain. Next, learners investigate cubic feet per second (cps), by carrying jugs in one second.

free Ages 11 - 18 45 to 60 minutes
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In this seismic simulation, learners play a "who-dunnit" game to explore earthquakes.

free Ages 11 - adult 1 to 2 hours
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In this activity, learners explore how the area of Arctic sea ice has changed over recent years. First, learners graph the area of Arctic sea ice over time from 1979 to 2007.

free Ages 11 - 18 45 to 60 minutes
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In this activity, learners use whale count data from the Hawaiian Islands Humpback Whale National Marine Sanctuary to compare whale counts in relation to environmental factors.

free Ages 14 - 18 1 to 2 hours
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In this activity, learners make a scale model of an atom to see how big or how small an atom is compared to its nucleus. Learners will realize that most of matter is just empty space!

free Ages 14 - 18 30 to 45 minutes
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In this online interactive simulation, learners will add different salts to water and then watch the salts dissolve and achieve a dynamic equilibrium with solid precipitate.

free Ages 8 - adult 10 to 30 minutes
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In this activity related to the famous "Stroop Effect," learners explore how words influence what we see and how the brain handles "mixed messages." Learners read colored words and are asked to say th

free Ages 8 - 18 10 to 30 minutes
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Exponga estos pósteres en el salón o déjelos donde los chicos los puedan explorar. Los chicos buscan las respuestas en línea, en libros de consulta, y en calendarios y almanaques.

free Ages 4 - adult 10 to 30 minutes
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In this online activity, learners build their own system of heavenly bodies and watch the gravitational ballet.

free Ages 11 - adult 10 to 30 minutes
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This activity introduces the idea of "divide and conquer" using a fictitious but serious problem--a pair of dirty socks has accidentally been wrapped in one of the presents that Santa is about to deli

free Ages 8 - 18 30 to 45 minutes
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In this activity, learners will be able to measure themselves in nanometers. A nanometer is a billionth of a meter, a unit of measurement used in nanotechnology.

free Ages 6 - 18 5 to 10 minutes
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In this online interactive, learners use fossils to infer temperatures 55 million years ago, at the sites where the fossils were found.

free Ages 11 - 18 10 to 30 minutes
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In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

free Ages 6 - 18 Under 5 minutes
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In this activity, learners will investigate how shorebirds and seabirds are extremely vulnerable to changes in their environment, whether human-induced or otherwise.

free Ages 14 - 18 1 to 2 hours
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In this activity (9th activity on the page), learners work in pairs to see how their perception of touch differs from reality.

free Ages 8 - 18 10 to 30 minutes
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In this activity, learners overlap the three primary colors to see how all other colors are made.

free Ages 11 - 18 10 to 30 minutes