Geophysics

Geophysics is the study of the forces that shape the Earth from a global perspective. Learn about gravity, plate tectonics and other topics.

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How can parts of Canada be 'missing' gravity?

For more than 40 years, scientists have tried to figure out what's causing large parts of Canada to be "missing" gravity. The force of gravity around Hudson Bay is lower than surrounding areas. Learn about two theories that may explain the phenomenon.

How Maps Work

It's no secret that maps are handy. If you get lost, a map can help you find your way. Maps are representations of data that can describe nearly anything about the world. Find out how map data is gathered and how maps are made.

What is a geomagnetic substorm?

On February 17, NASA launched a rocket with a record-setting five satellites onboard. The $200 million mission is to discover the source of an atmospheric phenomenon known as the geomagnetic substorm.

What if there were no gravity on Earth?

Have you ever wondered what would happen if we were able to flip a switch and turn the Earth's gravity off for a day? The end result may surprise you.

How the Earth Works

Even though it's tiny compared to the rest of the universe, the Earth is enormous, and it's extremely complex. Systems powered by the sun are able to sustain the various life forms living on Earth. Learn what ties all the parts of the Earth together.

Why does the North Pole move?

You probably know that the North Pole does not stay in the same spot. The North and South Poles can actually change positions. What causes this? Find out in this article.

How Fire Works

Few things have done as much harm to humanity as fire, and few things have done as much good. Find out where fire comes from and see why it behaves the way it does. The answers might surprise you!

If the polar ice caps melted, how much would the oceans rise?

The polar ice caps have been in the news recently because of their alleged shrinking due to global warming. If this is true, how much would the oceans rise if the ice caps melted completely? Learn the answer to this question in this article.

What would happen if I drilled a tunnel through the center of the Earth and jumped into it?

Let's say you have a lunch date to make – and it's on the other side of the planet. Wouldn't it be way more convenient to pop down a hole and take a 42-minute journey through Earth's innards?

How does a seismograph work? What is the Richter scale?

A seismograph can accurately measure the movement of the Earth during a quake. How does a seismograph work, though, and what is the Richter scale that is associated with earthquakes? Learn the answers to these questions in this article.

How much water is there on Earth?

Water is one of the most abundant substances on the planet. About 70 percent of our planet is covered by ocean. Just how much water is there on Earth? Find out the answer to this question in this article.

How does gravity work?

Gravity is a force that we experience every minute of our lives, but hardly notice or give a passing thought to in our daily routines. Have you ever wondered what gravity is and how it works? Learn about the force of gravity in this article.

Why is water vital to life?

Do you ever play that game in which you select the items you'd bring if you got stuck on a desert island? Along with that treasured bootleg recording of your favorite band, we think that an endless supply of water should be at the top of your list. Here's why.


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