Test Your Knowledge
We need calcium for strong bones. But what does calcium have to do with seashells, chalk, and limestone.
Find examples of dissolving in your body, in a cave, and underwater.
- Earth’s Atmosphere
Explore the five layers of our planet’s atmosphere.
Take a look at how water can change the shape of the world around us.
- Evaporation and Condensation
Find examples of evaporation and condensation in nature.
Take this quiz to find out how gases can save you in a car crash or make a volcano blow its top.
Compare different plants and learn which part of each plant is best for eating.
Discover the many ways soil is used to improve everyday life.
- Static Electricity
Explore lightning to understand what static electricity is and how it works.
- Stuff that Sticks
Find out how plants and animals produce substances that are sticky like glue.
- Surface Tension
Examine some pictures to see how water's attraction to itself can create natural works of art.
Learn about Mt. St. Helens, a volcano in the United States, to understand how volcanoes erupt.
Explore the many ways that water is essential to life on planet earth.