Planet Earth

Hands-On Activities

• Air
• Land
• Plants
• Recycling
• Water

Test Your Knowledge

• Calcium
  We need calcium for strong bones. But what does calcium have to do with seashells, chalk, and limestone.
• Dissolving
  Find examples of dissolving in your body, in a cave, and underwater.
• Earth’s Atmosphere
  Explore the five layers of our planet’s atmosphere.
• Erosion
  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.
• Gases
  Take this quiz to find out how gases can save you in a car crash or make a volcano blow its top.
• Plants
  Compare different plants and learn which part of each plant is best for eating.
• Soil
  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.
• Volcanoes
  Learn about Mt. St. Helens, a volcano in the United States, to understand how volcanoes erupt.
• Water
  Explore the many ways that water is essential to life on planet earth.