Glacier Lesson Worksheet
Name: ____________________________________ Block:____________
Glacier Worksheet
Provide a brief answer to each of the questions below based on the images.
|[pic] |Question 1 |
| | |
| |This view is looking up, over the toe of Carbon Glacier toward the peak of Mount Rainier in |
| |Washington. Why do you think there are rocks on top of the glacier? How did they get there? |
| |As the glacial ice moves, it scrapes and grinds the bedrock, and these loosened material |
| |become mixed into the ice. At the toe of the glacier, the ice melts, leaving the rock behind.|
| |This is called a moraine or till. |
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|[pic] |Question 2 |
| | |
| |This is a picture of the beach near Montauk Point on Long Island (at the eastern end of Long |
| |Island, New York). Usually rocks on a beach are well rounded by wave action. These are not. |
| |Where could they have come from? |
| | |
| |The deposits on Long Island are the deposits of a glacier moraine. The rocks were carried |
| |there by glacial ice and deposited at the terminus of a continental glacier. |
|[pic] |Question 3 |
| | |
| |This valley is in North Cascades National Park in Washington. |
| |What shape is this valley, and what gave it the shape? |
| | |
| |The valley is a U-shaped valley. It was carved by a glacier in the past, the the glacier has |
| |since melted. |
|[pic] |Question 4 |
| | |
| |This rock and wall is at the Cloisters Museum in New York City (on Manhattan Island). What are the "scratches" |
| |called, and how do they form? Why are they in New York City? |
| | |
| |Glaciers once covered the New York City area. The moving ice scraped the bedrock producing glacial groove and |
| |striations. The glaciers that once covered New York have since melted. |
|[pic] |Question 5 |
| | |
| |This picture shows two types of rocks on a mountaintop in northern New Jersey. This is a large boulder of a |
| |layered sandstone (a sedimentary rock) resting on granite bedrock (an igneous rock). Sandstone, like this boulder,|
| |is found on a mountain about 30 miles away. How this boulder might get here? |
| |A continental glacier once covered the northern New Jersey region. As the glacier moved south, the sandstone |
| |boulder was plucked from its bedrock source, and transported by the moving glacial ice to its current location. |
| |The glacier melted, leaving the boulder on the mountaintop. |
|[pic] |Extra Brain Teaser |
| | |
| |This view is looking north along the Hudson River in Southern New York. Although the "Hudson" |
| |is a "River" - early explorers of the region thought that the broad river might be a passage |
| |for boat travel across North America. Although they were disappointed, they did note that the |
| |Hudson River is salty all the way to its headwater regions near Albany, New York (nearly 200 |
| |miles from the ocean). Could you explain why the Hudson River is salty? |
| | |
| |The Hudson River is a Fjord. The valley was partially carved by a southward advancing ice sheet|
| |(or continental glacier). When the glaciers melted, rising sea level flooded the Hudson River |
| |Valley with sea water. |
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