Grades 3-5

What Do You Know About Earth?

What Do You Know About Earth?

How well grounded is your knowledge of our planet? Test your Earth science knowledge with this interactive quiz. Then, examine your faults—and the rights answers.

Meet the Earth OLogists

Meet the Earth OLogists

Do you dig the Earth? If so, you'll want to meet Arjun, Diana, Ruthmabel, and Ed. From volcanoes to deep sea vents, find out where these OLogists' interests have taken them.

Create a Compass

Create a Compass

From any place on Earth, a compass will always point north. But do you know why? Explore the inner workings of this tiny magnet by building one—and then testing it in your neighborhood.

Edible Earth

Edible Earth

Want to take a close look at the layers that make up our solid Earth? Cook up a model that's good enough to eat—from the spice drop inner core to the thin chocolate crust.

Start a Rock Collection

Start a Rock Collection

Why collect rocks? Because every rock has a story to tell about how Earth, and life on it, has changed over time. Learn how to create a collection that rocks!

Grow Rock Candy

Grow Rock Candy

No matter where you find mineral salt—on your table or at the beach—you'll see its unique cube-shaped crystals. Take a sweet look at the crystal patterns and compositions of minerals.

Planetary Mysteries

Planetary Mysteries

How much do you know about the Earth's little neighborhood within the vast universe? Take a virtual tour of our solar system to explore its many mysteries. Then put your new-found knowledge to the test.

Read With Your Fingers

Read With Your Fingers

Reading by touch instead of sight forms new and different neuron connections. Discover firsthand how your brain can learn to read Braille with your fingertips. 

Draw Your Nervous System

Draw Your Nervous System

Neurons can send more than 100 signals a second at speeds up to 250 miles an hour. Create a life-sized drawing to learn more about your body's speedy message carriers. 

Taste a Smell Test

Taste a Smell Test

It's not just the taste buds in your mouth that let you taste sweet, bitter, salty, sour, and other flavors. Take the Jellybean Test to find out how your nose helps you taste. 

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