Anything that occurs naturally in the environment and is used by people is called a(n)
Coal, oil and gold are considered ________ resources because they are not easily replaced in a human's lifetime.
nonrenewable
When a logger cuts down all the trees at once in a area, it is an example of _______________ _________________.
Clear Cutting
Size
Climate
Diversity of niches
What is an endangered species?
A species whose population is decreasing and is in danger of becoming extinct.
Pollution can be grouped into two categories, name both of them.
When a person uses a large number of resources, they are said to have a ____________ ecological footprint.
large
Preserves the habitat for wildlife, decreases erosion, better for the environment
What are the advantages of a diverse gene pool?
Healthy populations of wildlife have a variety of traits that allow them to survive diseases and reproduce to pass on the better traits.
What is an extinct species?
A species that no longer has any living members on Earth.
Describe an example of point source pollution.
A pipe spilling polluted water into a stream.
What are two ways that you can decrease or lower your ecological footprint?
Decrease your use of:
1. Electricity
2. Water
3. Food waste
4. Use of fossil fuels (gasoline, etc)
What are the advantages of clear cutting?
Costs less, trees are easily and quickly removed, safer for loggers
What is a keystone species?
A keystone species influences the survival of other species in the area.
The loss of a natural habitat is called:
Habitat Desectruction
What is environmental science?
The study of natural processes that occur in the environment and how humans affect them.
After 1650, the world's human population began increasing. What are two reasons why the human population grew so quickly?
Improvements in medicine, technology, sanitation
What is aquaculture?
What is captive breeding?
Captive breeding is mating wildlife in zoos or wildlife preserves to allow the populations to come back from being endangered.
What is poaching?
The illegal killing or removal of an animal from its habitat.
Any change in the environment that has a negative effect on living things is __________________.
Pollution
Name two renewable resources.
Water, Oxygen, Trees, etc
How do the laws that limit the number and size of fish that may be caught help protect fishery resources?
Fishing limits can help increase the population of remaining fish in a fishery because not as many fish can be caught. Smaller fish can be put back so that they can reproduce and add to the growing supply of fish.
A species that has a population that is decreasing and may become endangered.
How did eagles get DDT into their bodies? (3 or 4 steps)
1. DDT was sprayed on crops to kill bugs
2. Dead bugs washed into the stream
3. Fish ate the bugs with DDT
4. Eagles ate the fish with DDT