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Scientists use enormous wind tunnels to test the design of planes, helicopters, even the Space Shuttle.

In this simulation activity, learners observe what can happen when ocean waves churn up water and oil from an oil spill.

In some parts of the world, lakes freeze during winter. In this activity learners will explore water’s unique properties of freezing and melting, and how these relate to density and temperature.

In this fun sticker activity, learners will create a size wheel with images of objects of different size, from macroscopic scale (like an ant) to nanoscale (like DNA).

Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.

Glare from the sun and ripples from the wind can make it hard to see what's below the surface of a body of water.

This game for one to four players uses a deck of cards to develop mental addition skills.

In this activity, learners use binoculars (or a telescope) to identify and track sunspots. If using binoculars, learners need a pair that can be secured on a tripod.

This assortment of mathematical games can be played while traveling.

In this activity, learners make their own Sun tracker to explore how ancient civilizations around the world studied the Sun.

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

In this activity, learners make their own pinhole viewer in order to measure the size of the sun.

In this activity, learners use candy pieces and a cookie to make an accurate model of the Sun they can eat. Parts of the delicious model include solar granules, sunspots, and solar prominences.

How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?

This game teaches ratio and proportion by having learners make "salads" that combine three types of beans in different combinations.

En esta actividad, los participantes explorarán las fuerzas de gravedad y la resistencia al aire usando paracaídas.

En esta tira cómica, Mateo y Cientina emplean su conocimiento de la química y las medidas para esta actividad deliciosa - ¡hacer helado!

En esta actividad la tira cómica muestra a los participantes como pueden hacer un experimento simple para ver cuales líquidos son ácidos.

In this activity, learners look at and touch marine animal skulls to compare them and think about what they eat.

This is a guide for facilitating interaction at a touch tank with marine animals. The instructions are for setting up a display in an informal science center, but could work anywhere.