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Characteristics of Permafrost

Description: Permafrost is a layer of soil, rock, and organic material that remains frozen for at least two consecutive years. It is found in regions with a mean annual temperature of 0 degrees Celsius or below. Permafrost is a unique and fragile ecosystem that is home to a variety of plants and animals. It is also a valuable resource for scientific research.
Number of Questions: 15
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Tags: permafrost characteristics of permafrost environment
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What is the definition of permafrost?

  1. A layer of soil, rock, and organic material that remains frozen for at least two consecutive years

  2. A layer of soil, rock, and organic material that remains frozen for at least one consecutive year

  3. A layer of soil, rock, and organic material that remains frozen for at least three consecutive years

  4. A layer of soil, rock, and organic material that remains frozen for at least four consecutive years

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Correct Option: A
Explanation:

Permafrost is defined as a layer of soil, rock, and organic material that remains frozen for at least two consecutive years.

Where is permafrost found?

  1. Regions with a mean annual temperature of 0 degrees Celsius or below

  2. Regions with a mean annual temperature of 10 degrees Celsius or below

  3. Regions with a mean annual temperature of 20 degrees Celsius or below

  4. Regions with a mean annual temperature of 30 degrees Celsius or below

Show answer
Correct Option: A
Explanation:

Permafrost is found in regions with a mean annual temperature of 0 degrees Celsius or below.

What is the average thickness of permafrost?

  1. 1 meter

  2. 10 meters

  3. 100 meters

  4. 1,000 meters

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Correct Option: C
Explanation:

The average thickness of permafrost is 100 meters.

What is the maximum thickness of permafrost?

  1. 1 meter

  2. 10 meters

  3. 100 meters

  4. 1,000 meters

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Correct Option: D
Explanation:

The maximum thickness of permafrost is 1,000 meters.

What is the temperature of permafrost?

  1. 0 degrees Celsius or below

  2. 10 degrees Celsius or below

  3. 20 degrees Celsius or below

  4. 30 degrees Celsius or below

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Correct Option: A
Explanation:

The temperature of permafrost is 0 degrees Celsius or below.

What is the composition of permafrost?

  1. Soil, rock, and organic material

  2. Soil and rock

  3. Rock and organic material

  4. Soil and organic material

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Correct Option: A
Explanation:

Permafrost is composed of soil, rock, and organic material.

What is the role of permafrost in the global climate system?

  1. It helps to regulate the global temperature

  2. It helps to store carbon dioxide

  3. It helps to release methane

  4. It helps to release carbon dioxide and methane

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Correct Option: A
Explanation:

Permafrost helps to regulate the global temperature by storing carbon dioxide and methane.

What is the impact of climate change on permafrost?

  1. It is causing permafrost to melt

  2. It is causing permafrost to freeze

  3. It is causing permafrost to remain the same

  4. It is causing permafrost to grow

Show answer
Correct Option: A
Explanation:

Climate change is causing permafrost to melt.

What are the consequences of permafrost melting?

  1. It can release greenhouse gases

  2. It can cause flooding

  3. It can damage infrastructure

  4. All of the above

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Correct Option: D
Explanation:

Permafrost melting can release greenhouse gases, cause flooding, and damage infrastructure.

What can be done to protect permafrost?

  1. Reduce greenhouse gas emissions

  2. Increase reforestation

  3. Improve energy efficiency

  4. All of the above

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Correct Option: D
Explanation:

Reducing greenhouse gas emissions, increasing reforestation, and improving energy efficiency can all help to protect permafrost.

What is the future of permafrost?

  1. It is likely to disappear by the end of the century

  2. It is likely to remain stable

  3. It is likely to grow

  4. It is uncertain

Show answer
Correct Option: D
Explanation:

The future of permafrost is uncertain. It is possible that it will disappear by the end of the century, remain stable, or even grow.

What are some of the unique features of permafrost?

  1. It can contain ice wedges

  2. It can contain thermokarst lakes

  3. It can contain pingos

  4. All of the above

Show answer
Correct Option: D
Explanation:

Permafrost can contain ice wedges, thermokarst lakes, and pingos.

What is an ice wedge?

  1. A wedge-shaped crack in the permafrost that is filled with ice

  2. A wedge-shaped crack in the permafrost that is filled with water

  3. A wedge-shaped crack in the permafrost that is filled with soil

  4. A wedge-shaped crack in the permafrost that is filled with rock

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Correct Option: A
Explanation:

An ice wedge is a wedge-shaped crack in the permafrost that is filled with ice.

What is a thermokarst lake?

  1. A lake that forms in a depression in the permafrost

  2. A lake that forms in a depression in the soil

  3. A lake that forms in a depression in the rock

  4. A lake that forms in a depression in the organic material

Show answer
Correct Option: A
Explanation:

A thermokarst lake is a lake that forms in a depression in the permafrost.

What is a pingo?

  1. A hill or mound of ice-rich permafrost

  2. A hill or mound of soil

  3. A hill or mound of rock

  4. A hill or mound of organic material

Show answer
Correct Option: A
Explanation:

A pingo is a hill or mound of ice-rich permafrost.

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