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In this outdoor activity and observation game, learners hunt for a variety of textures, colors, odors and evidence of organisms in the activity site.

Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.

Some aquatic organisms live in open water, while some live in soil at the bottom of a body of water.

Millions of organisms can live in and around a body of water.

In this two-part outdoor activity, learners conduct a population census of squirting clams on a beach or mudflat, and investigate the clams' natural history.

How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?

In this outdoor activity/field trip, learners investigate organisms that live along the ocean's rocky coast.

In this outdoor, beach activity, learners use tennis balls, water balloons and other simple devices to investigate the movement of waves and currents off a sandy beach.

Learners will explore the concept of angular distance, and investigate why the moon appears to be the same size as the sun during a solar eclipse, despite the sun being much larger.

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

In this activity, learners will take a step back and learn the history of the land they live on, and the people who used to live on it.

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

This fun hands-on astronomy activity uses a variety of simple props to help learners understand why they see what they see in a telescope.

Glare from the sun and ripples from the wind can make it hard to see what's below the surface of a body of water.

In this field study, learners discover how to collect data in the field and how their efforts can help certain animals, specifically, amphibians.

In this laboratory experiment, learners explore how effectively different sunscreens protect yeast cells from damage caused by ultraviolet (UV) radiation.