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Make a Lake
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Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

Half Full or Half Empty
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In this activity (12th activity on the page), learners conduct an experiment to demonstrate how muscles are constantly feeding information to the brain about what they are doing.

Test Density with a Supersaturated Solution
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Learners create three solutions with different levels of salinity. They compare the density of these solutions by coloring them and layering them in a clear plastic cup and in a soda bottle.

Gummy Growth
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In this activity related to Archimedes' Principle, learners use water displacement to compare the volume of an expanded gummy bear with a gummy bear in its original condition.

Crunch Time
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In this quick and easy activity and/or demonstration, learners use two empty 2-liter bottles and hot tap water to illustrate the effect of heat on pressure.

Bend a Carrot
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In this activity, learners investigate the process of osmosis by adding salt to a sealed bag of raw carrots and comparing it to a control.
Forwards and Backwards: pH and Indicators
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Visitors prepare six solutions combining vinegar and ammonia that range incrementally from acid (all vinegar) to base (all ammonia).

Tabletop Biosphere
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In this activity, learners create a sealed, mini ecosystem that supplies freshwater shrimp with food, oxygen, and waste processing for at least three months.

Hot Stuff!: Creating and Testing for Carbon Dioxide
In this demonstration, learners observe vinegar and baking soda reacting to form carbon dioxide (CO2) gas.

Salt Water Revival
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In this outdoor activity, learners visit the intertidal zone of a rocky coastal site well populated with marine organisms.

Canned Heat
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In this activity, learners explore how light and dark colored objects absorb the Sun's radiations at different rates.

Habitats of the Pond
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In this outdoor activity/field trip, learners locate and study plants and animals in several freshwater pond habitats.

Drain Game
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In this activity (on pages 36-39), learners make a model of a watershed out of paper, then run water down the mountain to simulate how rainfall and pollution affect watersheds.

Positive Planning Adds Up
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In this drawing/mapping activity, learners design plots of land while incorporating positive strategies for improving water quality.

Wetlands
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Learners create a model of a wetland to observe how it absorbs and filters water from the environment.
What Molecules Make the Holes in Bread?
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In this activity, learners will discover why there are holes in bread.

Fill 'er Up!
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Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust.

Diffusion & Osmosis with Data Analysis
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This three-part lab helps learners understand the essential principles governing diffusion and osmosis.

The Watershed Connection
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In this activity, learners interact with a 3-D model of a watershed to better understand the interconnectedness of terrestrial and aquatic environments.

Great Steamboat Race
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In this outdoor activity, learners race small boats, made of cork, balsa wood, popsicle sticks etc., to investigate the rate and direction of currents in a stream or creek.