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Fitness Factor
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In this online activity, learners partner up to complete several physical exercises and assess their starting fitness level.

Thread the Needle: Using Two Eyes Gives You Depth Perception
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Closing one eye eliminates one of the clues that your brain uses to judge depth. Trying to perform a simple task with one eye closed demonstrates how much you rely on your depth perception.

Lung Model: Make a Lung and Diaphragm
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By building a model of a lung and diaphragm, learners discover the function of various parts of the body's respiratory system.

Fill 'er Up!
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Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust.

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.

Egyptian Measuring
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In this activity, learners compare the ancient Egyptian system of measurement, which was based on body lengths, to the customary and metric systems used today.

Making Babies
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This activity is designed to introduce learners to genes, genotypes and simple inheritance patterns.

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.

Habitat Web
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In this activity, learners explore the web of connections among living and non-living things.

Leaf Living
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In this outdoor fall activity, learners find out what living in or under a layer of leaves is like.

Oil Spot Photometer
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In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.

Mushroom Murder Mystery
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In this game (p.28 of PDF), learners discover different fungal lifestyles and the various roles that fungi play in nature. Learners play the roles of fungi and must find their corresponding trees.
Press Seaweed
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In this activity, learners will collect, dry and press seaweed over the course of four days in a similar way that artists/crafters press flowers.

Circulatory System Skit: Act out the Flow of Blood
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In this activity, learners act out the flow of blood in the human body! A great way to get learners up and moving while learning about the circulatory system.

Rain Forest in Your Room
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This activity (on pages 19-24) introduces learners to the rain forest's layers—emergent, canopy, understory, and forest floor—and has learners make paper lianas (vines that live attached to trees) and

Nature Drawing
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In this family or group activity, learners create a nature journal by visiting a local nature center or backyard, observing creatures in their natural habitats, and sketching what they see.

North American Endangered Amphibians Card Game
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In this activity, learners can play two card games related to endangered species, specifically North American amphibians.

Keep a "SLOG" (Sleep Log)
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In this activity (1st on the page), learners keep a "SLOG" or Sleep Log to study their sleep patterns.

Pollinator Bingo
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In this activity, learners will use their five senses to explore a nature-based area around them.

Build-A-Membrane
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In this activity, learners cut, fold, and paste paper representing biomolecules to create a three-dimensional cell membrane with embedded proteins.