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In this chemistry challenge, learners identify which plants have the enzyme "catalase" that breaks hydrogen peroxide into water and oxygen.

In this environmental science activity, learners research what is essential for plant life and the necessary components of soil to support plants.

In this activity, learners turn empty 2-liter bottles into a see-through compost container.

In this activity (located on pages 9-14 of PDF), learners visit a cemetery to examine the distinguishing characteristics of rock weathering.

This activity shows you how to make a mold terrarium using a jar and leftover food.

In this activity (on page 7), learners explore the meaning of a "carbon sink." Using simple props, learners and/or an educator demonstrate how plants act as carbon sinks and how greenhouse gases cause

In this design challenge, learners will use computational thinking to design their own board game.

In this activity, young learners (2 years and up) explore dirt and what is in it by painting with mud.

In this game, learners match descriptions of marine debris (shoes, batteries, paper towels, etc.) to images of these items.

In this game, learners walk through an imaginary Carbon Cycle and explore the ways in which carbon is stored in reservoirs and the processes that transport the carbon atom from one location to another

Learners design their own experiment to determine conditions that either help or hinder the decomposition of carrots by soil microbes.

In this outdoor activity, learners make their own organic-rich soil. Depending on where this activity is done, learners will probably discover that their local soil is low in organic matter.

In this outdoor activity, learners cut through and investigate rotten logs and then make log-profile puzzles for each other.

This activity (page 2 of the PDF under SciGirls Activity: Bogs) is a full inquiry investigation into decomposition.