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In this multi-part activity learners examine non-point water pollution.

In this online activity, learners adjust mountain snowfall and temperature to see how glaciers grow and shrink. They will use scientific tools to measure thickness, velocity and glacial budget.

This simple, yet surprising physics demonstration challenges preconceptions about forces, and demonstrates the strength of atmospheric pressure.

In this design challenge, learners will engineer a structure and see if it can survive an earthquake they create.

In this design challenge, learners will practice empathy and design thinking skills by creating an invention of the future.

In this activity (on page 2), pairs of learners create an imaginary crime scene. One person leaves the room while the other person moves a few things around.

In this physics demonstration, learners will be surprised when a handkerchief holds water in an upside-down glass.

This is an activity where learners will compare the different metamorphosis stages of amphibians.

In this online interactive simulation, learners will add different salts to water and then watch the salts dissolve and achieve a dynamic equilibrium with solid precipitate.

In this activity, learners will explore the ways natural materials can produce sounds. Appropriate for any age, learners can make individual music or create a symphony with others.

In this interactive game, learners compare their music-listening skills with that of a three-month-old baby.

In this activity, learners will reuse plastic bags in an interesting way.

Using simple materials from around the house and recycled materials, learners will engineer a grabber device to pick up and put down objects that are at least 12 inches away.

Use this Moon Map Guide to help learners identify features on the Moon, while looking through a telescope.

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

In this activity, learners will engineer a roof using simple materials to protect a construction paper person from a rainstorm.

In this activity, learners will explore their center of gravity.

In this interactive game, learners listen to the songs of four different thrushes and then try to match each bird with its song.

With a bit of PVC, a laser, a can/cup, and a small mirror, you can make a device that visualizes you voice or any sound transmitted into the cup/can.

In this online activity, learners use a realistic mass and spring laboratory. They hang masses from springs and adjust the spring stiffness and damping.