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In this activity, learners verify that the Sun appears in a different location at a specific time every day of the year with one exception: on the Equinoxes.

$1 - $5 per student Ages 6 - 14
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This lesson focuses on how materials behave differently as their surface area increases.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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Rocks are made of minerals, and minerals often have crystal shapes. In this fun activity about geometry in nature, learners create their own crystal shapes out of paper.

1 cent - $1 per student Ages 8 - 18 45 to 60 minutes
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Learners test two jars containing soil, one covered and one open, for changes in temperature. After placing the jars in the Sun, learners discover that the covered jar cools down more slowly.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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Learners investigate the concept of humidity by using a dry and wet sponge as a model. They determine a model for 100% humidity, a sponge saturated with water.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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In this easy chemistry activity, learners submerge pennies in different liquids (water, lemon juice, vinegar, liquid hand soap, salt water, and baking soda mixed with water) to observe which best clea

$1 - $5 per group Ages 6 - 11 1 to 7 days
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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 investigate the formation of craters. Learners will examine how the size, angle and speed of a meteorite's impact affects the properties of craters.

$1 - $5 per student Ages 6 - 14 45 to 60 minutes
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This fun hands-on astronomy activity lets learners use star maps (included) to find constellations and to identify stars with extrasolar planets (Northern Hemisphere only, naked eye).

$1 - $5 per group Ages 8 - adult 45 to 60 minutes
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Learners test two jars, one containing plain air and one containing carbon dioxide gas, to see their reactions to temperature changes.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this activity (2nd on the page), learners conduct a series of tests to find out which foot is more dominant. In other words, are they right-footed or left-footed?

free Ages 8 - 14 10 to 30 minutes
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Players take turns adding shapes made of three squares to a grid. They try to fit their shapes on the grid in a way that blocks the other player.

free Ages 4 - 14 10 to 30 minutes
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In this activity (on page 2 of the PDF under GPS: Sailboat Design Activity), learners will discover how the shape of an object, not just its weight, determines whether it floats or sinks.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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This activity (located on page 3 of the PDF under GPS: Cave Swallows Activity) is a full inquiry investigation into bird behaviors.

free Ages 8 - 14 2 to 4 hours
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In this fun hands-on activity learners explore a simple machine: the lever. What happens to a load when you multiply the length of a lever? Find out here!

$1 - $5 per student Ages 8 - 11 45 to 60 minutes
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This activity (on page 3 of the PDF under GPS: Baseball Activity) is a full inquiry investigation into how "bounciness" relates to the distance a ball will fly when hit off a batting tee.

$5 - $10 per group Ages 8 - 14 1 to 2 hours
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In this activity, learners will use Google Sky to observe features of the night sky and share their observations.

free Ages 4 - 11 10 to 30 minutes
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In this activity about the brain and sleep (on page 138 of the PDF), learners measure their resting breathing rates. Learners will discover that breathing frequencies vary amongst individuals.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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This activity explores the main algorithms that are used as the basis for searching on computers, using different variations on the game of battleships.

1 cent - $1 per group Ages 8 - adult 30 to 45 minutes
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In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes