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In this activity, learners conduct an experiment to investigate the effect of elevated levels on CO2 on plant growth.

This guide outlines how to plant a garden even if you don't have a yard!

In this activity, young learners will make their own flower seed nursery in an egg carton.

An estuary is a body of water that is created when freshwater from rivers and streams flows into the saltwater of an ocean.

In this activity, learners use food scraps from the kitchen to grow new vegetables.

Plants need nutrients to grow. This is why we apply fertilizers to grass and food crops. In this activity, learners will explore how fertilizers can affect lakes and other bodies of water.

In this fun and in depth hands-on experiment, learners test various liquid samples (distilled water, lemon juice, vinegar, and baking soda mixed with water) to determine their pH levels and identify e

In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).