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In this activity related to indoor air pollution, learners build take-home dust catchers with wax paper and petroleum jelly.

In this design challenge, learners use their creativity and imagination to design and test a wildlife crossing for their favorite animal.

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.

This activity (on pages 35-43) lets learners analyze a "herd of elk" to detect the spread of a bacterial disease called brucellosis.

This marine biology activity (on pages 11-17) introduces learners to kelp (seaweed) forests that grow in the ocean and are home to many species of sea animals.

In this activity (on pages 18-29) learners explore the impact of the March 24, 1989 oil spill in Alaska caused by the Exxon Valdez tanker.

This activity guide features three related explorations to help learners ages 3-6 investigate shadows via the following science concepts: A shadow is made when an object blocks the light; you can chan

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

In this activity, learners will build a design and build a place for pollinators to drink from.

In this activity, learners will test soil content using their sample, some water and a container that seals.

In this activity, learners compare and contrast their own skin (including the area covered) with that of an orange.

In this food science activity, learners conduct an experiment that demonstrates the importance of light to plants.

This is a virtual representation of a sound mixer containing pre-looped sounds of animal, insect, and environmental noises.

Have you noticed the plastic rings that are used to hold six-packs of soda? Those rings are great for carrying cans, but they're real trouble when they become trash that animals can get tangled in.

Learners design their own experiment to investigate how pollution diffuses through ground material.

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

En esta actividad, los aprendices harán un terrario usando materiales simples.

In this activity, learners calculate their water usage (in cups and galloons) during an average shower. Learners also chart and analyze water usage during showers in their households.

In this activity, learners will create a magnifying glass called a waterscope, using water and household items, to examine various objects.

In this activity on page 5 of the PDF (Plants—The Green Machines), learners use chromatography to separate and identify pigments within various leaves.