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Discover how the salt in soil affects plant growth with a few seeds, some cotton, and salt. In this hands-on activity, you will plant seeds in 2 different kinds of soil, containing more or less salt.

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.

In this activity, learners create a biosphere in a baggie.

In this activity (located at the bottom of the page), learners investigate soil and explore the creatures that live in it.