0
Glaciers
Glaciers are large, dynamic bodies of ice that form over long periods of time when snow accumulation exceeds ice ablation. They are among the most significant forces shaping Earth's landscape over long time scales. Glaciers are currently found at Earth's poles and in mid-latitude and equatorial mountains.
1,124 Questions
What happens to a glacier when they get very heavy?
The density of ice at 0°C is 0.9167 g/cm³. The density increases slightly at lower temperatures.
Therefore, the volume and temperature of the glacier is needed in order to calculate the exact weight.
What causes motion of glacier?
gravity. And the fact that ice behaves in a plastic (ductile, not brittle) fashion
Glaciers are formed when snow accumliates over a long period of time, often in a hollow. As the snow builds up the pressure builds up causing the snow to compact so much it is turned to ice.
The ice only becomes a glacier when it starts to move, usually this movement is due to gravity.
There are two types of glacier, valley glaciers and ice sheets. As you can imagine valley glaciers are formed in valleys where a river has frozen. These can often lead to the formation of ribbon lakes, hanging valleys, U-shaped valleys and truncated spurs.
Ice sheets are simpley large glaciers that can be anywhere, some are small, others are the soze of continents. As they move they can cause plucking and abrasion. As well as this they can cause corries and drumlins, amongst other things.
What are 2 ways glaciers erode the land?
The two processes are abrasion and plucking.
What processes lead to glacial erosion? Describe them.
The two main processes that lead to glacial erosion are plucking and abrasion. Plucking is the process by which a glacier picks off rocks as it blocks over the land. The rock fragments freeze to the bottom of the glacier, gouging and scratching the bedrock as the glacier advances in the process of abrasion.
How are glaciers and Icebergs alike?
A glacier is a frozen river, which forms in freezing conditions high up in mountains. As it reaches lower altitudes, it may melt. However, in some parts of the world, especially in Greenland and in Antarctica, the air is so cold that the glacier can reach the sea and remain frozen. When this happens, the glacier pushes the frozen water out into the ocean. Eventually, under the influence of wave action or internal stresses, a lump of ice breaks off. This process is known as calving. The lump of ice is now free to float away. It is called an iceberg.
How many meters deep is the Lambert Glacier?
According to its Wikipedia entry:
"Lambert Glacier is a major glacier in East Antarctica. At about 60 miles wide, over 250 miles long, and about 2,500 m deep, it holds the Guinness world record for the world's largest glacier."
What percentage on earth's surface is covered in glaciers?
it is 28% of the world was covered by glaciers.
28% of the earth was covered by Glaciers during the Ice Age.
What are all the scientists that study glaciers?
The scientific study of glaciers and their effect on the landscape say again
When was Mengele given the name Angel of Death?
Because of the cruelty of his "experiments," which resulted in the deaths of his "subjects."
It's called a "hanging valley". Many waterfalls occur at hanging valleys.
How much of the earths water is fresh water that is not frozen?
Very little of the water on earth is outside either the oceans or the polar ice caps. Only three percent of the water in the world is fresh, and of that:
- 26.5 million cubic kilometres or about 2.1 percent of all water is in the Antarctic Ice Sheet
- 3 million cubic kilometres or about 0.25 percent is in the Greenland Ice Sheet
- Most of the rest is in a few major lakes like Lake Baikal (23,600 km3 or one fifth of non-frozen water), Lake Tanganyika (18,900 km3), Lake Superior (11,600 km3) and Lake Malawi (7,725 km3).
- The proportion of the total water that is fresh and not frozen is very small, around 0.003 percent of all the water in the world.
Steep-sided, half-bowl shaped recesses carved into mountains at the heads of glacial valleys.
The Fjords: Steep cliffs, acting as ocean inlets.
Horn peaks: Where cirques intersect.
Terminal moraines: Piles of rocks.
Crevasses: Cracks in glaciers
Are glaciers carved basins that filled with water to form lakes?
No, glaciers form from snow that falls high in the mountains then consolidates and refreezes into ice under the weight of later snows. This ice and snow then flows down the mountains into valleys producing a characteristic U-shaped erosion pattern in those valleys.
What are 2 ways glaciers build up the land?
Glaciers are forces of erosion of the land they tend to do the opposite of build it up, they wear it down.
However they do deposit moraines and when they melt the land springs up a little.
Which New york state landscape region has the lowest elevation?
The New York state landscape region with the lowest elevation is the Atlantic Coastal Plain. This region stretches along the southeastern part of the state and features flat terrain characterized by beaches, wetlands, and low-lying areas. The elevation generally ranges from sea level to a few hundred feet above sea level, making it the lowest region in the state.
False. At the last glacial maximum, the southernmost reach of the glaciers was around central Ohio. The areas that are now Mexixo and the southern U.S. were free of continental glaciers.
Where are glaciers found on the planet?
Glaciers are found on every continent on Earth, with the largest concentrations in polar regions such as Antarctica and Greenland. They also exist in high mountain ranges like the Alps, Himalayas, Rockies, and Andes, where they are fed by snowfall and high elevations.
