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Mathematics

# Measurement

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## Anatomy of a Firework

There's more to a fireworks display than meets the eye. This interactive activity from the NOVA Web site looks at the technology behind each burst of light.

6-12

Interactive

## Antarctica: A Challenging Work Day

What happens when the ground under your feet is ice and it's moving? This video segment adapted from NOVA features some of the dangers faced by scientists conducting research in Antarctica.

3-12

Video

This video segment from NOVA: "The Mystery of Animal Pathfinders" explores honeybee communication and navigation.

6-8

Video

## Birth of a Supernova, Type Ia

In this interactive activity from NOVA Online, learn about a type of exploding star — a Type Ia supernova — that is so bright that astronomers can measure the distance to the galaxy in which it resides, and even learn which elements make up the star.

6-12

Interactive

## Buoyancy Basics

This illustrated demonstration from the NOVA Web site explains the concepts of buoyancy and density by showing what happens when different kinds of wood blocks are dropped in water.

3-8

Document

## Buoyancy Brainteasers: Balloon-in-Car Puzzler

This interactive brainteaser from the NOVA Web site challenges you to explain the behavior of a helium-filled balloon in a moving car.

3-8

Interactive

## Buoyancy Brainteasers: Boat-in-Pool Puzzler

This interactive brainteaser from the NOVA Web site challenges you to figure out what happens to the water level when a rock is resting in a boat and when it is submerged in water.

3-8

Interactive

## Buoyancy Brainteasers: Buoyancy Question

This interactive brainteaser from the NOVA Web site challenges you to figure out what causes an object to sink.

3-8

Interactive

## Earthquakes: The Seismograph

This video segment adapted from NOVA uses historical illustrations, photographs, and animations to explain how seismographs work, the difference between P and S waves, and the Richter scale.

6-12

Video

## Einstein's Special Theory of Relativity

What happens when you approach the speed of light? This video segment adapted from NOVA follows one of Albert Einstein's thought experiments and his quest to find the answer.

9-12

Video

## Einstein's Thoughts on the Ether

Do light waves travel through the ether like waves on a lake travel through water? In this video segment adapted from NOVA, a young Albert Einstein grapples with this question while examining the speed of light.

6-12

Video

This interactive feature from the NOVA "Everest" Web site lets you take the same brain quizzes that researchers used to test the brain function of climbers on Mount Everest.

6-8

Interactive

## Fastest Glacier

In this video segment adapted from NOVA scienceNOW, scientists in western Greenland explain how a glacier there is shrinking and moving faster due to increased melting.

6-12

Video

## Fireworks! Making Color

What gives a fireworks display its brilliant blue, green, and red colors? Learn how pyrotechnicians give fireworks color in this video segment adapted from NOVA.

6-12

Video

## Galileo: His Experiments

This interactive activity from the NOVA Web site samples Galileo's experiments with falling objects, projectiles, inclined planes, and pendulums.

6-12

Interactive

## Galileo: His Place in Science

Einstein called Galileo the "father of modern physics." This media-rich essay from the NOVA Web site looks at Galileo's quest to understand the mathematics of motion.

6-12

Document

## Galileo's Inclined Plane

How did Galileo figure out the mathematics of falling bodies? This video segment adapted from NOVA examines Galileo's work on motion.

6-12

Video

## Galileo's Telescope

The invention of the telescope helped change our understanding of the universe. This video segment adapted from NOVA looks at Galileo's contribution to this technology.

6-12

Video

## Galileo: Timeline of His Life

This illustrated timeline from the NOVA Web site turns back the clock to the late 1500's to relive the dramatic life of one of the world's most renowned scientists.

6-12

Document

## Gravity at Earth's Center

In this video segment from NOVA scienceNOW, learn about the effects of gravity as astrophysicist Neil deGrasse Tyson falls through a virtual hole through Earth's center.

6-12

Video

## History of the Universe

This interactive timeline from the NOVA Web site recaps the theoretical origin and formation of the universe, and forecasts its eventual fate.

6-12

Interactive

## How Big Is the Universe?

In this media-rich essay from the NOVA Web site, astronomer Brent Tully of the University of Hawaiʻi walks you through the latest scientific theories about the size of the universe.

6-12

Document

## Hurricanes: New Tools for Predicting

This video segment adapted from NOVA scienceNOW features new advances in predicting the intensity of hurricanes.

6-12

Video

6-12

Interactive

## The Leaning Tower: Where It Stands Today

Will the Leaning Tower of Pisa give way to gravity? In this interview from the NOVA Web site, engineer John Burland relates the difficult job of saving the tower.

6-12

Document

## Mount Pinatubo: Predicting a Volcanic Eruption

This video segment adapted from NOVA relates the dramatic story of vulcanologists trying to predict the timing of the cataclysmic eruption of Mount Pinatubo in the Philippines.

6-12

Video

## Raising an Obelisk: An Engineering Puzzle

This video segment adapted from NOVA follows two teams as they each test a different engineering design in an effort to explain how ancient Egyptians raised a giant stone obelisk.

3-12

Video

## Relativity and the Cosmos

This illustrated essay from the NOVA Web site introduces the basic concepts of Einstein's General Theory of Relativity and what we know about cosmology as a result.

6-12

Document

## Robot Race

In this video segment adapted from NOVA, cars drive themselves. Teams of designers using different technologies compete for a two-million-dollar prize to see which unmanned vehicle will make it to the finish line first.

3-12

Video

## Sagan on Time Travel

Astronomer Carl Sagan discusses the possibility of time travel in this audio-enhanced interview from the NOVAWeb site.

9-12

Document

## Shipwrecks Reveal Ocean Currents

In this video segment adapted from NOVA, a detailed map showing the trajectories of abandoned ships from the late 1800's is used to reveal the routes of surface currents in the Atlantic Ocean. Animations illustrate the role played by ocean currents in the colonization of North America.

6-12

Video

## Sound Waves Underwater: Experiment with Sonar

This animation from the NOVA Web site describes how sonar uses sound waves to "see" underwater.

6-12

Document

## Speed of Light: How Fast Is That?

How fast is 300,000 kilometers per second? This text from the NOVA Web site offers a few real-world comparisons for the speed of light.

6-12

Interactive

## Speed of Light: Time Traveler

This interactive game from the NOVA Web site explores what happens to time as a traveler approaches the speed of light.

6-12

Interactive

## Stellar Velocity: The Doppler Effect

This interactive activity from the NOVA Web site illustrates the Doppler effect and shows how it applies to measuring the direction and speed of stellar objects.

6-12

Interactive

## String Theory: A New Picture of Gravity

This video segment from NOVA describes the general theory of relativity and the theory of electromagnetism.

6-12

Video

## String Theory: A Sense of Scale

This interactive activity from the NOVA Web site puts the infinitesimally small world of string theory into perspective.

6-12

Interactive

## String Theory: A Strange New World

This video segment from NOVA chronicles Einstein's quest to unify the forces of electromagnetism and gravity.

6-12

Video

## String Theory: A Theory of Everything?

This video segment from NOVA introduces the basic ideas behind string theory and looks at the quest for unification.

9-12

Video

## String Theory: Elementary Particles

This illustrated essay from the NOVA Web site looks at the fundamental forces and particles that make up all matter.

6-12

Document

## String Theory: Gravity - The Odd Man Out

This video segment from NOVA describes the discovery in the 1930s of two forces in addition to electromagnetism: the strong nuclear force and the weak nuclear force.

9-12

Video

## String Theory: Science or Philosophy?

This video segment from NOVA discusses the challenge of proving the scientific validity of string theory, in question because strings may be too small to ever be seen or detected, and therefore tested.

9-12

Video

## String Theory: Strings to the Rescue

This video segment from NOVA discusses the challenge of unifying the force of gravity and the forces described by quantum mechanics into a single theory of unification.

9-12

Video

## Taking the Earth's Temperature

This video segment from FRONTLINE/NOVA: "What's Up with the Weather?" depicts research efforts to record Earth's past and present temperatures shifts.

9-12

Video

## Think Like Einstein

This interactive activity from the NOVA Web site challenges you to think like Einstein and understand how time travel might be possible.

6-12

Interactive

## To Survive at High Velocity

This video segment adapted from NOVA looks at speed, velocity, and centripetal force on the racetrack.

6-12

Video