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In this activity, learners calculate the percentage of oxygen in the atmosphere by using steel wool's ability to rust.

In this activity, learners make a miniature greenhouse or "terrarium" to explore the greenhouse effect.

Did you know that the water we use today is the same water found on Earth millions of years ago? The Earth constantly uses and recycles water in a process called the water cycle.

This three-part activity shows learners how to build three meteorology tools: a wind vane, a rain gauge, and a barometer.