Website review: Howstuffworks "How can parts of Can...
Ballistix discovered this in Geoscience
•18 reviews since May 16, 2007
geoscience, science, gravity
•science.howstuffworks.com/missing-gravity.htm
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Reviews of this website
Ballistix discovered 15 months ago- Very interesting. You learn something new every day!
- StephSchiff rated 7 weeks ago
- From the page: "For more than 40 years, scientists have tried to figure out what's causing large parts of Canada, particularly the Hudson Bay region, to be "missing" gravity. In other words, gravity in the Hudson Bay area and surrounding regions is lower than it is in other parts of the world, a phenomenon first identified in the 1960s when the Earth's global gravity fields were being charted."
- lunaticprophet rated 8 weeks ago
- "How can parts of Canada be "missing" gravity? From the page: For more than 40 years, scientists have tried to figure out what's causing large parts of Canada, particularly the Hudson Bay region, to be "missing" gravity. In other words, gravity in the Hudson Bay area and surrounding regions is lower than it is in other parts of the world, a phenomenon first identified in the 1960s when the Earth's global gravity fields were being charted. Two theories have been proposed to account for this anomaly. But before we go over them, it's important to first consider what creates gravity. At a basic level, gravity is proportional to mass. So when the mass of an area is somehow made smaller, gravity is made smaller. Gravity can vary on different parts of the Earth. Although we usually think of it as a ball, the Earth actually bulges at the Equator and gets flatter at the poles due to its rotation. The Earth's mass is not spread out proportionally, and it can shift position over time. So scientists proposed two theories to explain how the mass of the Hudson Bay area had decreased and contributed to the area's lower gravity. One theory centers on a process known as convection occurring in the Earth's mantle. The mantle is a layer of molten rock called magma and exists between 60 and 124 miles (100 to 200 km) below the surface of the Earth . Magma is extremely hot and constantly whirling and shifting, rising and falling, to create convection currents. Convection drags the Earth's continental plates down, which decreases the mass in that area and decreases the gravity."
- sargt000 rated 3 months ago
- i broke canada.
- markchenjd rated 5 months ago
- Really great article about an area in Canada that's "missing" gravity, and the nice explanation of how scientists figured out what was going on. Just a note, some of the commenters below seem to overestimate the effect. The difference in gravity would be unnoticeable in every day life.
- Michaela73 rated 6 months ago
- What a great page with information on countless wonders - science, aircraft, military, oceanography, genealogy and geophysics. From the page: "Geophysics is the study of the forces that shape the Earth from a global perspective. Learn about gravity, plate tectonics and other topics."
- yatgirl rated 8 months ago
- and I thought it was just good weed!
- starxgemini rated 10 months ago
- Well I learned something new today... From the page: "For more than 40 years, scientists have tried to figure out what's causing large parts of Canada, particularly the Hudson Bay region, to be "missing" gravity. In other words, gravity in the Hudson Bay area and surrounding regions is lower than it is in other parts of the world, a phenomenon first identified in the 1960s when the Earth's global gravity fields were being charted."
- andrew222 rated 10 months ago
- Parts of Canada have very low gravity. I did not know about this. This means that the Hockey players skate much faster in these parts....
- MagsHills rated 13 months ago
- Canada. It's hanging on in there ;-) Canada has a very innovative music scene: Gravity/Music ha-ha! No seriously it's no surprise there are parts of the globe like this. What is solid anyway? There is more space between atoms than there are atoms in the universe. The fact that there is anything solid at all is nothing short of a miracle. Are atoms lonely? ;-)
