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Where is permafrost located in tundra?
under the surface of the earth
mass extinction
thin layer in the upper atmosphere that protects Earth from ultraviolet rays.
carbon dioxide
intertidal zones, deep sea vents and salt marshes
coral reef
aerosol sprays
wetlands
What is the ozone layer?
under the surface of the earth
mass extinction
thin layer in the upper atmosphere that protects Earth from ultraviolet rays.
carbon dioxide
intertidal zones, deep sea vents and salt marshes
coral reef
aerosol sprays
wetlands
Which of the following are part of the ocean's ecosystems?
under the surface of the earth
mass extinction
thin layer in the upper atmosphere that protects Earth from ultraviolet rays.
carbon dioxide
intertidal zones, deep sea vents and salt marshes
coral reef
aerosol sprays
wetlands
Which gas is a greenhouse gas?
under the surface of the earth
mass extinction
thin layer in the upper atmosphere that protects Earth from ultraviolet rays.
carbon dioxide
intertidal zones, deep sea vents and salt marshes
coral reef
aerosol sprays
wetlands
Which of the following items would be an ecosystem within the ocean ecosystem?
under the surface of the earth
mass extinction
thin layer in the upper atmosphere that protects Earth from ultraviolet rays.
carbon dioxide
intertidal zones, deep sea vents and salt marshes
coral reef
aerosol sprays
wetlands
What are sudden large declines in biodiversity in the fossil record called?
under the surface of the earth
mass extinction
thin layer in the upper atmosphere that protects Earth from ultraviolet rays.
carbon dioxide
intertidal zones, deep sea vents and salt marshes
coral reef
aerosol sprays
wetlands
What did scientists believe was the cause of the hole in the ozone layer?
under the surface of the earth
mass extinction
thin layer in the upper atmosphere that protects Earth from ultraviolet rays.
carbon dioxide
intertidal zones, deep sea vents and salt marshes
coral reef
aerosol sprays
wetlands
What is an important freshwater ecosystem with a high biodiversity that is also declining in numbers?
under the surface of the earth
mass extinction
thin layer in the upper atmosphere that protects Earth from ultraviolet rays.
carbon dioxide
intertidal zones, deep sea vents and salt marshes
coral reef
aerosol sprays
wetlands
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