Grades 3-5

seasonal cycle_thumb

Seasonal Cycle

If the Earth turns all the way around every 24 hours, then why are some days longer than others? And why do we have winter and summer? See the answers for yourself—in a matter of seconds.

Train of Thought

Train of Thought

Take your imagination on a wonderful, mind-bending trip with these "thought experiments" worthy of Einstein himself. With this train, it truly is all about the journey.

Fusion Simulation

Hands-on Activity

Fusion Simulation

Confused about fusion? You won't be once you've completed this experiment, which demonstrates how a strong nuclear force can fuse two protons that naturally repel each other.

How the Sun Works

Activity

How the Sun Works

Talk about a long-term power source. For billions and billions of years, the Sun has been giving off energy that equals 4 x 1026 watts. What keeps the Sun burning so bright?

Classroom Activity

Weightlessness on Earth?

Who said daydreams are a waste of time? One of Einstein's flights of fancy led to the equivalence principle—the knowledge that while an object is in free fall, it's free of gravity's effects.

Einstein Web List

Curriculum Materials

Einstein Web List

Where to begin when a Web search turns up millions of sites about Einstein? Let us point you to some of the best—from Time's person of the century profile to a black hole animation.

Physics Books

Physics Books

Meet one of the world's most influential scientists. Construct a compass and a flashlight. Find out how to pop through a wormhole. And further explore physics with these 10 kid-friendly titles.

Nobody's Perfect

Nobody's Perfect

Perfection certainly wasn't something to strive for, according to Einstein. In fact, he believed that messing up was a part of being successful—an idea that, itself, has proven relevance.

Space and Time

Space and Time

Do you know how to describe where you are in the fourth dimension? Or what it would take to turn a rabbit into a black hole? Explore the fascinating nature of space and time.

James Hutton: The Founder of Modern Geology

Online Resource, Article

James Hutton: The Founder of Modern Geology

Until the late 18th century, most people believed the Earth was about 6,000 years old. Hutton changed this belief by proposing that geologic forces operate at the same rate today as in the past.

Reefs in Crisis

Online Resource, Article

Reefs in Crisis

Humans have harmlessly harvested coral reefs for thousands—or even hundreds of thousands—of years. So why has our behavior in recent years suddenly put reefs at risk?

Studying Tree Rings to Learn About Global Climate

Online Resource, Article

Studying Tree Rings to Learn About Global Climate

By taking biopsy-like samples from centuries-old Siberian pines, scientists have reconstructed a 300-year record of temperature changes for the Arctic and the Northern Hemisphere.

Saving Species

Saving Species

Take a world-wide tour of biodiversity. You'll meet mollusks in the reefs off the Bahamas, the aye-aye in the tropical forests of Madagascar, and the clever mimic-ant spider that lives in Australia.

Work the System!

Work the System!

Did you know that forests with leaves above the water can grow in the ocean? Grab the magical magnifying glass, and see how many different plants and animals you can find in this virtual mangrove swamp. 

It Takes All Kinds to Make a World

It Takes All Kinds to Make a World

The ocean's one diverse place—with alga so tiny that 10 million can fit in a single teaspoon to whales longer than three school buses. Take the surfboard challenge, and ride the waves of biodiversity!

SELECT PAGE