To prevent certain fish populations from collapsing, certain ____________________ have been temporarily closed.
2.
A location that has 170 species of birds has greater _________________________ than a location that has 100 species of birds.
3.
Excessive levels of DDT in top-level consumers are a result of ______________________________.
4.
Zoos have established _________________________ programs in which young animals are raised in protected surroundings until the population is stable and are later returned to the wild.
5.
Intense UV radiation due to ozone depletion can damage plant leaves and ____________________ in the oceans.
6.
Because the gases that make up the air can be replaced by natural processes, air is classified as a(an) ____________________ resource.
7.
Microscopic particles, such as dust and ash, that can enter the nose, mouth, and lungs are called ____________________.
8.
Sustainable practices are based on principles of ecology as well as ____________________.
9.
A combination of overgrazing, farming, and drought has turned once-productive areas into deserts by a process known as ____________________.
10.
The ____________________ acts as Earth’s sunscreen.
Short Answer
1.
How do modern subsistence hunters differ from ancient hunter-gatherers?
2.
What is the “tragedy of the commons”?
3.
What are the goals of sustainable development, and upon what principles are sustainable practices based?
4.
What is a biodiversity “hot spot”? Where is such a hot spot in the United States?
5.
Describe three services that are provided by a healthy biosphere.
6.
What is suburban sprawl?
7.
What development in human history led to humans gathering in settlements, towns, and cities?
8.
Why is biodiversity one of Earth’s greatest natural resources?
9.
How is hunting a threat to biodiversity?
10.
What is ozone? Why is it important?