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In this activity, learners see how many coins they can add to a full glass of water before the water overflows.

1 cent - $1 per student Ages 6 - 14 5 to 10 minutes
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In this activity, learners plan and create a 24-foot long, two-dimensional model of our solar system, and compare and contrast the differences between planets and the sun.

1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners build their own magnetometer using an empty soda bottle, magnets, laser pointer, and household objects.

$5 - $10 per student Ages 11 - adult 1 to 2 hours
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In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.

1 cent - $1 per group Ages 6 - 18 5 to 10 minutes
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Learners test two jars containing hot water, one covered with plastic and one open, for changes in temperature.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners build a simple pinhole viewer. They use this apparatus to project images from a variety of light sources, including a candle, the Sun, and the Moon.

$1 - $5 per student Ages 6 - 14 30 to 45 minutes
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In this archaeology activity, learners make observations and conduct an experiment to demonstrate the effect saltwater has on artifacts.

$10 - $20 per group Ages 8 - 14 1 to 7 days
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In this three-part activity, learners use food to determine the effects of wind, sandblasting and water on regolith (dust) formation and deposition on Earth.

$1 - $5 per student Ages 8 - 18 45 to 60 minutes
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In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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In this activity, learners map their world by drawing a plan of their bedroom.

free Ages 8 - 14 30 to 45 minutes
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In this activity, learners create their own archaeological profiles.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this math activity, based on the research of famed astronomer Frank Drake, learners calculate the possibilities of finding intelligent life elsewhere in the universe besides Earth.

1 cent - $1 per group Ages 11 - adult 45 to 60 minutes
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This kinesthetic science demonstration introduces learners to four states of matter: solid, liquid, gas, and plasma.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this activity, participants will learn about how gigantic clouds of gas and dust in space, called nebulas, are formed. They'll create their own colorful model nebula using paint and a spinner.

Over $20 per group Ages 4 - adult 5 to 10 minutes
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In this activity, learners use simple materials to simulate the effect of X-rays in a safe way. Learners place a piece of window screen over a box and a cardboard pattern on top of the screen.

$1 - $5 per student Ages 8 - 14 5 to 10 minutes
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In this activity, learners explore the concept of density-driven currents (thermohaline circulation) and how these currents are affected by climate change.

$10 - $20 per group Ages 8 - adult 1 to 2 hours
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In this activity, learners explore Boyle's Law and discover that water will boil at room temperature if its pressure is lowered.

1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.

$10 - $20 per group Ages 8 - adult 10 to 30 minutes
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This activity (on pages 23-27) lets learners simulate the work of scientists who take core samples of Earth's rocky layers to determine geological history.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners take on the role of a carbon atom and record which reservoirs in the carbon cycle they visit.

$10 - $20 per group Ages 11 - 18 30 to 45 minutes