Question

Choose the correct answer from the given alternatives for the questions that follow it. PASSAGE: There are two basic types of glaciers, those that flow outward in all directions with little regards for any underlying terrain and those that are confined by terrain to a particular path. The first category of glaciers includes those massive blankets that cover whole continents, appropriate called ice sheets. There must be over 50,000 square kilometers of land covered with ice for the glacier to qualify as an ice sheet. When portions of an ice sheet spread out over the ocean, they form ice shelves. About 20,000 years ago the cordilleran Ice sheet covered nearly all the mountains in southern Alaska, western Canada, and the western United States. It was about 3 kilometers deep at its thickest point in northern Alberta. Now there are only two sheets left on Earth, those covering Greenland and Antarctica. Any domelike body of ice that also flows out in all directions but covers less than 50,000 square kilometers is called an ice cap. Although ice caps are rare nowadays, there are a number in northeastern Canada, on Baffin Island, and on the Queen Elizabeth Islands. The second category of glaciers includes those of a variety of shapes and sizes generally called mountain or alpine glaciers. Mountain glaciers are typically identified by the land form that controls their flow. One form of mountain glacier that resembles an ice cap in that it flows outward in several directions is called an ice field. The difference between an ice field and an ice cap is subtle. Essentially, the flow of an ice field is somewhat controlled by surrounding terrain and thus does not have the domelike shape of a cap. There are several ice fields in the Wrangell, St. Elias, and Chugach mountains of Alaska and northern British Columbia. Less spectacular than large ice fields are most common types of mountain glaciers; the cirque and valley glaciers. Cirque glaciers are found in depressions in the surface of the land and have a characteristic circular shape. The ice of valley glaciers, bound by terrain, flow down valleys, curves around their corners, and falls over cliffs.

1) What does the passage mainly discuss? A) Where major glaciers are located B) How glaciers shape the land C) How glaciers are formed D) The different kinds of glaciers pack​

Answer 1

The correct answer is B) The passage mainly discusses the different kinds of glaciers. It provides information about ice sheets, ice shelves, ice caps, ice fields, cirque glaciers, and valley glaciers. These types of glaciers are described based on their characteristics, locations, and how they flow.

Step-by-step explanation:

The passage mainly discusses the different kinds of glaciers. It provides information about two basic types of glaciers: those that flow outward in all directions with little regard for underlying terrain, and those that are confined by terrain to a particular path.

The first category of glaciers is called ice sheets, which are massive blankets that cover whole continents. To qualify as an ice sheet, there must be over 50,000 square kilometers of land covered with ice. When portions of an ice sheet spread out over the ocean, they form ice shelves. Currently, there are only two ice sheets left on Earth, which are Greenland and Antarctica.

The second category of glaciers is referred to as mountain or alpine glaciers. They come in a variety of shapes and sizes. One type is called an ice field, which flows outward in several directions, resembling an ice cap. The difference between an ice field and an ice cap is that the flow of an ice field is somewhat controlled by surrounding terrain and does not have the domelike shape of a cap.

Other common types of mountain glaciers mentioned in the passage are cirque glaciers and valley glaciers. Cirque glaciers are found in depressions on the land's surface and have a characteristic circular shape. Valley glaciers, on the other hand, flow down valleys, curve around corners, and may fall over cliffs.

In summary, the passage discusses the different types of glaciers, including ice sheets, ice shelves, ice caps, ice fields, cirque glaciers, and valley glaciers. It provides information about their characteristics and locations, highlighting the distinctions between each type.

Answer 2

The passage discusses the different kinds of glaciers, such as ice sheets, ice shelves, ice caps, and mountain glaciers, including cirque and valley glaciers.

Step-by-step explanation:

The passage mainly discusses the different kinds of glaciers. There are two primary types of glaciers: ice sheets and mountain or alpine glaciers. Ice sheets are massive, covering entire continents and flowing outward regardless of the underlying terrain, requiring over 50,000 square kilometers of covered land to qualify. When they extend over the ocean, they form ice shelves. Current ice sheets are only found in Greenland and Antarctica. Ice caps are similar to ice sheets but cover less land area. Mountain glaciers, however, are confined by terrain and include varieties like ice fields, which flow outward in multiple directions but are somewhat controlled by terrain, and cirque and valley glaciers, which fill depressions and valleys on the land's surface respectively. The passage provides detailed examples of these glaciers and their geographic locations.