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In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

In this activity about computer programming, learners follow instructions in a variety of ways in order to successfully draw figures.

In this activity about afterimages, learners explore what happens when receptor cells called cones in your eye's retina get tired.

Combine math and exercise with this activity. Learners count how many times in a row they can skip rope or throw and catch a ball.

In this activity, learners will pretend to be archaeologist using this chilling experience.

In this activity, learners use a simple 3D model to discover why the Moon has phases.

In this activity, learners will investigate how craters are made and the different factors that contribute to size left from the impact.

In this activity, learners imitate the way vocal cords work by building a model from a plastic cup, rubber band, and a straw.

In this activity about tangrams, learners print and cut out their own tangram shapes and solve puzzles by fitting these geometric pieces together in a variety of ways.

In this activity, learners will test soil content using their sample, some water and a container that seals.

In this activity/demo, learners investigate biobarcodes, a nanomedical technology that allows for massively parallel testing that can assist with disease diagnosis.

In this wintertime outdoor activity, learners role play wolves tracking their prey by following scented trails.

This activity/demo introduces learners to aerogel, a glass nanofoam. Learners discover how aerogel is made and how well it insulates as well as learn about aerogel's other unique properties.

In this activity, learners make a photographic image—without a camera!

In this activity, learners will experiment with changing flower colors. Learners will investigate the effects of acids and bases on flower colors.

In this activity, learners will plan a snack within a budget. With a $20 limit (theoretical) to spend on snack for everyone, learners look over grocery store circulars and make their shopping lists.

Learners use their knowledge of color changes with red cabbage indicator to neutralize an acidic solution with a base and then neutralize a basic solution with an acid.

In this activity, learners will be able to measure themselves in nanometers. A nanometer is a billionth of a meter, a unit of measurement used in nanotechnology.

In this activity, learners craft their own model of a comet on a stick to make it fly around the room.

Many people get water from a source deep underground, called groundwater.