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In this activity, learners use chocolate to explore how the Sun transfers heat to the Earth through radiation.

In this activity, learners will explore saturated solutions and discover how crystals form.

In this activity, learners model the flow of energy from the sun as it enters a photovoltaic cell, moves along a wire and powers a load.

Why should we wear masks? Do masks work? Do some masks work better than others? Learners find out in this activity.

In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors.

In this activity, learners will investigate the part of soil. Explore how clay, silt, and sand make up the dirt in your background. Activity includes step-by-step instructions and extension ideas.

In this activity, learners explore density and buoyancy as they design and construct rafts.

This activity demonstrates the importance of wearing a helmet to protect the brain. An egg is used to symbolize a head with the shell as the skull and the inside of the egg as the brain.

In this activity, learners observe color mixing and absorbency using colored tissue paper and spray bottles.

In this activity, learners experiment with how dish soap and fat interact by making a colorful swirl.

In this activity, learners explore mammal locomotion by constructing flipbooks.

In this hands-on activity, learners simulate the crashing and smashing of a meteor impact using household cooking supplies.

How do you measure a bubble when it's floating? You can't really, but in this activity, learners can measure the diameter of the ring of suds a bubble leaves on a flat surface.

In this activity, learners make film canister rocket ships. A fin pattern is glued onto the outside of the canister, and fuel (water and half an antacid tablet) is mixed inside the canister.

In this online activity, learners will explore size estimation in one, two and three dimensions. Multiple levels of difficulty allow for progressive skill improvement.

In this activity, learners discover how a cabbage juice indicator helps identify acids and bases, and how iodine indicates the presence of starch.

In this activity, learners will build a honeycomb. Learners will investigate how the shape of the honeycomb develops. Activity includes step-by-step instructions and extension ideas.

In this activity learners will be creating art using a traditional Japanese art style.

In this activity, learners mimic remote sensing. Learners use a stick to measure the distance to a "planet surface" they cannot see, and create their own map of the landscape.

In this activity, learners discover how exercise helps keep the body healthy. Learners increase their heart rates by running and understand how running fast versus walking affects their pulse rates.