Question 1

The greenhouse effect is a natural and important phenomenon because it

Accepted Answer

A)  removes smog from affected areas. 
B)  maintains the surface temperature on Earth. 
C)  reverses the effect that CFCs have on the ozone layer. 
D)  decreases the amount of carbon dioxide in the stratosphere. 
E)  reverses the effects of deforestation. 
A)  removes smog from affected areas. 
B)  maintains the surface temperature on Earth. 
C)  reverses the effect that CFCs have on the ozone layer. 
D)  decreases the amount of carbon dioxide in the stratosphere. 
E)  reverses the effects of deforestation.

Question 2

More than half the world's human population lives in rural poverty. Which of the following environmental issues is most likely to be associated with these populations?

Accepted Answer

A)  desertification 
B)  acid rain 
C)  oil pollution 
D)  smog 
E)  ozone depletion 
A)  desertification 
B)  acid rain 
C)  oil pollution 
D)  smog 
E)  ozone depletion

Question 3

Pollution of groundwater is generally a more serious concern, in part because groundwater is a slowly exchanging pool.

Accepted Answer

A) True 
 B)False

Question 4

Heat is considered a type of water pollution because it increases the amount of oxygen in the water, which leads to the death of plants and the overpopulation of animals.

Accepted Answer

A) True 
 B)False

Question 5

Biodiversity refers to the variety of richness of species on Earth.

Accepted Answer

A) True 
 B)False

Question 6

Scientists have identified approximately ________ million species of organisms, but millions more are thought to exist.

Accepted Answer

The answer of Scientists have identified approximately ________ million species...

Question 7

Freshwater is most likely to be polluted

Accepted Answer

A)  by oil spills in ocean water moving inland. 
B)  as a result of eutrophication. 
C)  by contaminants from aquifers moving to surface waters. 
D)  from organic solvents and farming chemicals in surface water runoff. 
E)  by radioactive waste seeping from nuclear reactors. 
A)  by oil spills in ocean water moving inland. 
B)  as a result of eutrophication. 
C)  by contaminants from aquifers moving to surface waters. 
D)  from organic solvents and farming chemicals in surface water runoff. 
E)  by radioactive waste seeping from nuclear reactors.

Question 8

Which of the following pollutants is generally stored in dry locations because they remain a potential problem for thousands of years?

Accepted Answer

A)  radioactive waste 
B)  PANs (peroxyacyl nitrates) 
C)  CFCs 
D)  heavy metals 
E)  gasoline and oil 
A)  radioactive waste 
B)  PANs (peroxyacyl nitrates) 
C)  CFCs 
D)  heavy metals 
E)  gasoline and oil

Question 9

Most of the energy used by humans comes from which one of the following sources?

Accepted Answer

A)  solar energy 
B)  nuclear energy 
C)  fossil fuels 
D)  hydroelectric power 
E)  geothermal power 
A)  solar energy 
B)  nuclear energy 
C)  fossil fuels 
D)  hydroelectric power 
E)  geothermal power

Question 10

________ provide valuable flood control because they can hold large volumes of water.

Accepted Answer

Wetlands or Marshes

Question 11

Surface and aquifer freshwater sources hold what percent of the Earth's total water?

Accepted Answer

A)  2% 
B)  more than 97% 
C)  10-12% 
D)  less than 1% 
E)  20% 
A)  2% 
B)  more than 97% 
C)  10-12% 
D)  less than 1% 
E)  20%

Question 12

Which one of the following statements is TRUE regarding rural poverty?

Accepted Answer

A)  Less than 25% of the world's population lives in rural poverty. 
B)  The problems of land use in rural areas are similar to those in cities. 
C)  Those in impoverished rural communities will often cut down all trees for fuel and shelter. 
D)  The use of communal lands in impoverished rural areas is carefully monitored. 
E)  Few individuals living in rural areas depend on the local environment for sustenance. 
A)  Less than 25% of the world's population lives in rural poverty. 
B)  The problems of land use in rural areas are similar to those in cities. 
C)  Those in impoverished rural communities will often cut down all trees for fuel and shelter. 
D)  The use of communal lands in impoverished rural areas is carefully monitored. 
E)  Few individuals living in rural areas depend on the local environment for sustenance.

Question 13

The major concerns regarding the effects of air pollution fall into the areas of smog, acid rain, destruction of the ozone layer, and

Accepted Answer

A)  pesticides. 
B)  sustainable development. 
C)  global warming. 
D)  chlorofluorocarbons. 
E)  denitrification. 
A)  pesticides. 
B)  sustainable development. 
C)  global warming. 
D)  chlorofluorocarbons. 
E)  denitrification.

Question 14

Commercial logging by European countries in the Ivory Coast has reduced the pristine 70 million acres of forests that once existed to about

Accepted Answer

A)  fewer than 1 million acres. 
B)  5-7 million acres. 
C)  15-20 million acres. 
D)  30 million acres. 
E)  50 million acres. 
A)  fewer than 1 million acres. 
B)  5-7 million acres. 
C)  15-20 million acres. 
D)  30 million acres. 
E)  50 million acres.

Question 15

Prolific growth of algae as a result of pollutants in a lake is an example of ________.

Accepted Answer

The answer of Prolific growth of algae as a result...

Question 16

The largest hole in the ozone layer occurs in the stratospheric layer over

Accepted Answer

A)  the Amazon rainforests. 
B)  the eastern coast of the United States. 
C)  the western coast of the United States. 
D)  Africa and South America. 
E)  Antarctica. 
A)  the Amazon rainforests. 
B)  the eastern coast of the United States. 
C)  the western coast of the United States. 
D)  Africa and South America. 
E)  Antarctica.

Question 17

According to public health officials, all of the following may be caused by water pollutants EXCEPT which one?

Accepted Answer

A)  birth defects 
B)  nervous disorders 
C)  miscarriages 
D)  skin rashes 
E)  autoimmune disorders 
A)  birth defects 
B)  nervous disorders 
C)  miscarriages 
D)  skin rashes 
E)  autoimmune disorders

Question 18

Humans have become so dependent on fossil fuels that despite an increasing body of evidence that indicates burning these fuels is destroying aspects of the environment, little change in the sources of fuels has occurred. What types of alternative fuels can be used to reduce negative impacts on the environment?

Accepted Answer

There are many alternative fuel sources

Question 19

Eutrophication of a lake most likely is the result of

Accepted Answer

A)  an increase in oxygen content of the water. 
B)  elevated nitrogen and oxygen gas levels in the water. 
C)  an increase in atmospheric pressure associated with surface waters. 
D)  competitive exclusion. 
E)  excessive concentrations of organic and inorganic nutrients. 
A)  an increase in oxygen content of the water. 
B)  elevated nitrogen and oxygen gas levels in the water. 
C)  an increase in atmospheric pressure associated with surface waters. 
D)  competitive exclusion. 
E)  excessive concentrations of organic and inorganic nutrients.

Question 20

The main human activities that have raised atmospheric CO2 levels are

Accepted Answer

A)  succession and adaptive radiation. 
B)  home development on grasslands and wetlands. 
C)  drainage of wetlands along rivers and oceans. 
D)  deforestation and burning fossil fuels. 
E)  negligible because CO2 levels have risen and fallen naturally regardless of human activity. 
A)  succession and adaptive radiation. 
B)  home development on grasslands and wetlands. 
C)  drainage of wetlands along rivers and oceans. 
D)  deforestation and burning fossil fuels. 
E)  negligible because CO2 levels have risen and fallen naturally regardless of human activity.

Exam 24: Human Impacts, Biodiversity, and Environmental Issues

The greenhouse effect is a natural and important phenomenon because it

More than half the world's human population lives in rural poverty. Which of the following environmental issues is most likely to be associated with these populations?

Pollution of groundwater is generally a more serious concern, in part because groundwater is a slowly exchanging pool.

Heat is considered a type of water pollution because it increases the amount of oxygen in the water, which leads to the death of plants and the overpopulation of animals.

Biodiversity refers to the variety of richness of species on Earth.

Scientists have identified approximately ________ million species of organisms, but millions more are thought to exist.

Freshwater is most likely to be polluted

Which of the following pollutants is generally stored in dry locations because they remain a potential problem for thousands of years?

Most of the energy used by humans comes from which one of the following sources?

________ provide valuable flood control because they can hold large volumes of water.

Surface and aquifer freshwater sources hold what percent of the Earth's total water?

Which one of the following statements is TRUE regarding rural poverty?

The major concerns regarding the effects of air pollution fall into the areas of smog, acid rain, destruction of the ozone layer, and

Commercial logging by European countries in the Ivory Coast has reduced the pristine 70 million acres of forests that once existed to about

Prolific growth of algae as a result of pollutants in a lake is an example of ________.

The largest hole in the ozone layer occurs in the stratospheric layer over

According to public health officials, all of the following may be caused by water pollutants EXCEPT which one?

Eutrophication of a lake most likely is the result of

The main human activities that have raised atmospheric CO2 levels are

Human Biology, Science, and Society

The Chemistry of Living Things

Structure and Function of Cells

From Cells to Organ Systems

The Skeletal System

The Muscular System

Blood

Heart and Blood Vessels

The Immune System and Mechanisms of Defense

The Respiratory System: Exchange of Gases

The Nervous System: Integration and Control

Sensory Mechanisms

The Endocrine System

The Digestive System and Nutrition

The Urinary System

Reproductive Systems

Cell Reproduction and Differentiation

Cancer: Uncontrolled Cell Division and Differentiation

Genetics and Inheritance

DNA Technology and Genetic Engineering

Development and Aging

Evolution and the Origins of Life

Ecosystems and Populations

Filters

The main human activities that have raised atmospheric CO₂ levels are