Grades 9-12

Climate Change Circles of Consequences

Classroom Activity

Climate Change Circles of Consequences

"Greenhouse effect" and "global warming" are becoming household phrases but how, exactly, are they linked? Explore the interconnections and consequences of climate change.

Focal Point

Activity

Focal Point

What is a telescope's focal point, and why is knowing its location so important to astronomers? Grab a flashlight, an empty soda bottle, and a few other supplies; then find out.

Digital Images: The Universe Exposed

Article

Digital Images: The Universe Exposed

For most of human history, recording a star meant describing it with words or drawing a picture. The 19th-century invention of photography changed that—only to be revolutionized by digital imaging.

Filtering Light

Curriculum Materials

Filtering Light

All the color photos of astronomical phenomena that we see in magazines and books begin as three separate images—one red, one green, and one blue. Explore how CCD cameras and their color filters work.

The 3-D Universe

Article

The 3-D Universe

A 2-D map is a great guide here on Earth—and virtually worthless for finding your way around in outer space. Take a 3-D look at mapping our solar system and universe.

Parallax

Curriculum Materials

Parallax

When it comes to observing stars, our eyes have their limitations. Take a look at how astronomers combat these limits and accurately measure the distances between celestial bodies.

Gravity: It's Universal

Online Resource

Gravity: It's Universal

We owe our lives to gravity. It holds the atmosphere to Earth and keeps us all from falling off into space. Not to mention that without gravity, the stars and planets—including Earth—wouldn't even exist!

Space Shuttle Orbiter

Curriculum Materials

Space Shuttle Orbiter

Did you know that satellites and the Space Shuttle don't need engines to power their orbits? See how Earth's gravitational pull bends their forward motion and keeps them moving around the planet.

Safety and Wintering Over in Antarctica

Article

Safety and Wintering Over in Antarctica

Antarctica's winter runs from mid-February through late August. If you decide to stay, you're there for the duration—all aircraft traffic is stopped. Learn how research crews prepare to go it alone.

Sea Ice and Climate in Antarctica

Article

Sea Ice and Climate in Antarctica

At the poles, it's possible to study sea ice that's 3,000 years old. Find out what scientists learn by cutting up ice cores and seeing the ice crystals' many different textures and colors.

Crazy Cold Air

Classroom Activity

Crazy Cold Air

Why does cold air rush out of a freezer when you open the door? How does it then move through a room? Experiment to learn the answers—and gain insight into the blustery winds of Antarctica.

Meet the Bighorn Sheep

Educator Guide

Meet the Bighorn Sheep

This slideshow provides background information on the bighorn sheep and their habitat and breeding habits.

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