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In this activity, learners discuss the different salinities of oceans, rivers and estuaries.

In this environmental science activity about biodiversity, learners play a game to discover the effects of non-native species on an ecosystem.

This activity (page 3 of the PDF under SciGirls Activity: Dinosaurs) is a full inquiry investigation into fossil hunting and identification.

In this activity, learners use a model for how fishing affects marine life populations, and will construct explanations for one of the reasons why fish populations are declining.

In this activity, learners investigate the impact of oil pollution on the environment and wildlife. Learners use hard-boiled eggs and feathers to understand the damage that oil spills can cause.

In this outdoor activity, learners work in pairs using their senses—especially touch—to learn more about individual trees.