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Runaway Runoff
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When it rains, water can collect on top of and seep into the ground. Water can also run downhill, carrying soil and pollution with it.
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Habitable Worlds
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In this group activity, learners consider environmental conditions—temperature, presence of water, atmosphere, sunlight, and chemical composition—on planets and moons in our solar system to determine
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Exploring Ultraviolet (UV) light from the Sun
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In this outdoor activity, learners explore UV rays from the Sun and ways to protect against these potentially harmful rays.
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Hand Battery
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In this activity about chemistry and electricity, learners form a battery by placing their hands onto plates of different metals.
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Pixel Tube
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In this STEAM activity, learners create a "pixel tube" to explore reflections of light and color mixing.
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Dip Dip, Hooray
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Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.
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What's the Risk?
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To discover the risk and protective factors involved in substance addiction, learners play a game of chance to determine whether a fictitious child is likely or unlikely to abuse drugs.
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Sawing Away
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In this outdoor activity, learners saw sections from fallen trees, then count tree rings and look closely at patterns of tree growth.
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Colored Shadows
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In this optics activity, learners discover that not all shadows are black. Learners explore human color perception by using colored lights to make additive color mixtures.
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Otter Smorgasbord
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In this graphing activity (on pages 33-40), learners investigate how much and what kinds of food sea otter pups eat during their first year of life.
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Exploring Size: Scented Solutions
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This is an activity in which learners will find that they can detect differences in concentration better with their nose (smelling) than with their eyes (seeing).
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Cellular Soap Opera
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In this activity, learners create a large film of soap and experiment with what can and cannot pass through it.
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Clear Water, Murky Water
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How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-599.png?itok=T5w6XhN-)
Freshwater Ecosystems
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In this activity, learners create a freshwater ecosystem in a large plastic bottle. Learners cut and prepare bottles, then fill with water, aquatic plants, snails and fish.
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Sand Dunes
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This outdoor activity (on page 2 of the PDF under SciGirls Activity: Sand Dunes) is a full inquiry investigation into how the amount of moisture in a sand dune relates to the number of plants growing
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Biotechnology Through Time
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In this activity, learners investigate the history and development of agricultural biotechnology.
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Global Climate Change and Sea Level Rise
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In this activity, learners practice the steps involved in a scientific investigation while learning why ice formations on land (not those on water) will cause a rise in sea level upon melting.
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Comparing Sizes of Microorganisms
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In this activity related to microbes, learners create scale models of microorganisms and compare relative sizes of common bacteria, viruses, fungi and protozoa using metric measures: meters, centimete
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Food Chains
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In this activity, learners will explore the roles of different animals in the food chain. They will create their own food chain using organisms of their choice.