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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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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, learners use cheap, thin plastic garbage bags to quickly build a solar hot air balloon. In doing so, learners will explore why hot air rises.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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Learners build a simple aneroid barometer to learn about changes in barometric pressure and weather forecasting. They observe their barometer and record data over a period of days.

$1 - $5 per student Ages 8 - 14 1 to 4 weeks
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Learners conduct a simple experiment to model and explore the harmful effects of acid rain (vinegar) on living (green leaf and eggshell) and non-living (paper clip) objects.

$1 - $5 per group Ages 8 - 14 4 to 24 hours
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Learners use M&Ms® (or any other multi-color, equally-sized small candy or pieces) to create a pie graph that expresses the composition of air.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this experiment using sprigs of Elodea, learners will observe a natural process that removes carbon dioxide (CO2) from Earth's atmosphere.

$10 - $20 per group Ages 11 - 14 1 to 2 hours
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Learners blow into balloons and collect their breath--carbon dioxide gas (CO2). They then blow the CO2 from the balloon into a solution of acid-base indicator.

$1 - $5 per student Ages 8 - 14 5 to 10 minutes
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Learners build a model of a pollution control device--a cyclone. A cyclone works by whirling the polluted air in a circle and accumulating particles on the edges of the container.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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In this demonstration, learners observe vinegar and baking soda creating carbon dioxide (CO2) in a bottle. The gas is poured out of a bottle onto a candle flame, putting out the candle.

1 cent - $1 per group Ages 8 - 14 5 to 10 minutes
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In this activity, learners use rice grains to model the composition of the atmosphere of the Earth today and in 1880. Learners assemble the model while measuring percentages.

$1 - $5 per group Ages 11 - 18 1 to 2 hours
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In this activity, learners observe the effect of transpiration as water is moved from the ground to the atmosphere.

1 cent - $1 per group Ages 6 - 14 2 to 4 hours
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In this activity, learners conduct an experiment by heating an aluminum can filled with water to investigate air pressure.

free Ages 8 - 14 5 to 10 minutes
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In this physics demonstration, learners will be surprised when a lemon slice appears to magically levitate within a pint glass.

1 cent - $1 per group Ages 8 - adult Under 5 minutes
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In this weather forecasting activity, learners determine the location of cold and warm fronts on weather plot maps.

free Ages 8 - 18 45 to 60 minutes
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In this hands-on activity, learners simulate the crashing and smashing of a meteor impact using household cooking supplies.

$1 - $5 per student Ages 4 - 14 10 to 30 minutes
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In this demonstration, learners compare and contrast regular water ice to dry ice (frozen carbon dioxide). Both samples are placed in a solution of acid-base indicator.

$1 - $5 per group Ages 8 - 14 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 lesson plan, learners examine some of the of greenhouse gas emissions sources in their community.

free Ages 11 - 14 45 to 60 minutes