Ecosystems And Human Impact Question Preview (ID: 12756)


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What is the ozone layer?
a) thin layer in the lower atmosphere that protects Earth from supersonic rays
b) thin layer in the upper atmosphere that protects Earth from supersonic rays
c) thin layer in the upper atmosphere that protects Earth from ultraviolet rays.
d) thin layer in the lower atmosphere that protect Earth from ultraviolet rays.

Which gas is a greenhouse gas?
a) nitrogen
b) sulfur dioxide
c) oxygen
d) carbon dioxide

What happens with insecticides and herbicides that we put on our lawns?
a) They end up evaporating
b) They end up in bodies of water killing animals and plant life.
c) They end up dissolving into the lawns.
d) They end up in bodies of water and nourish animal and plant life.

How many times in the history of Earth has the number of species dropped drastically?
a) four times
b) three times
c) five times
d) six times

What are sudden large declines in biodiversity in the fossil record called?
a) mass evolution
b) mass decline
c) mass increase
d) mass extinction

Where is permafrost located in tundra?
a) surface of the earth
b) in the flora
c) under the surface of the earth
d) in the atmosphere

Which of the following items would be an ecosystem within the ocean ecosystem?
a) marshes
b) coral reef
c) rivers
d) ponds

Which of the following are part of the ocean's ecosystems?
a) intertidal zones, deep sea vents and lakes
b) intertidal zones, estuaries and lakes
c) intertidal zones, estuaries and ponds
d) intertidal zones, deep sea vents and salt marshes

What is an important freshwater ecosystem with a high biodiversity that is also declining in numbers?
a) tides
b) estuaries
c) wetlands
d) reefs

What did scientists believe was the cause of the hole in the ozone layer?
a) cars
b) aerosol sprays
c) acid rain
d) pump spray bottles

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