Structure of Living Things
The Tree of Life
Check out a cladogram, the ultimate family tree. On it,
you can see how all living things are related.
Learn more about the diversity of Earth’s organisms.
Plant Structures and Functions
Observe leaves, parts of a flower, and a corn seedling using
this collection of guides. They provide an illustrated look at
Human Body Systems
Slowing the Flow
All mammals are adapted for surviving in cold water. Take the plunge here! Learn why the mammal’s diving reflex is your cold-water friend.
You know that oil and water don't mix. What about salt water and fresh water? Find out first-hand with this investigation.
The Path to El Niño
Every two to seven years, wind, cloud, and sea-level patterns change in the Pacific Ocean near the equator. Learn about this hard-to-predict climate change. See if you can create your own El Niño.
The Solar System
An Interview with Mars
Join forces with Stella Stardust to interview the red planet. As Mars, you can proudly tell the world about being home to the largest volcano in the solar system.
Types of Matter
All living things contain carbon, the sixth element on the Periodic Table. Make a mobile of this elemental element with scissors, wire, pipe cleaners, and clay.
Changes in Matter
Mundo Shamundo! With the help of these magic words, the Amazing Mundo can literally reverse the sands of time. Watch him transform worldly objects ... back into rocks in this fun comic strip.