Chapter 37 - Conservation Flashcards
What is conservation?
It is the maintenance of the environment and the natural resources in a state that maintains biodiversity.
What is the difference between renewable and non-renewable sources?
Non-renewable sources cannot be replaced or used again, while renewable sources are infinite and can be used again.
Why do we need to conserve non-renewable sources?
- it can be deplete if not managed properly
- all have a limited supply
- it cannot be replaced
- depletion of oil/gas all contribute to environmental issues such as global warming and pollution
What is sustainable development?
It is development providing for the need of increasing human population while preserving the environment.
Why is sustainable development important?
- resources must be protected for future generations
- it avoid destroying the environment/earth
- it avoids extinction of animals
- it slows down global warming
How can forests be sustained?
- forest areas can be turned into large reserves or protected areas
- ecotourism must be implemented in these reserves
- an international ban on trade in endangered forest species can be made
- only selective felling of trees must be allowed
How can fish stocks be sustained?
- fish quotas
- education
- restocking of fish
Name the reasons for treating sewage.
- it prevents the spreading of diseases
- it helps avoid pollution
- water is recycled
- it prevents eutrophication
Name the steps in sewage treatments.
- Collecting and pumping
- Screening
- Grit removal
- Primary sedimentation
- Aeration and digestion
- Final sedimentation
- Disinfection (purification)
What is endangered?
It is a species threatened with extinction, because their numbers are reduced to a level so low that reproduction is affected.
What does critically endangered mean?
It is a species likely to become extinct, because their numbers are not sustainable and too low for the survival of the species.
What is extinction?
When a species can no longer be found in the wild or captivity, the entire genetic heritage is lost.
Name the causes of why organisms are becoming extinct or endangered.
- global warming
- climate change
- sea levels
- droughts
What is climate change?
It is the average weather in a place.
How does pollution endangers species?
- ships pollute saltwater by dumping waste
- oil spills kill large number of organisms
- factories and cars release chemicals into the air
