Transcript Document
Resources and Living Things Chapter 3 Test Review Air pollution in Los Angeles is what type of source? nonpoint source Occurs naturally in the environment and is used by people. natural resource Contamination of Earth’s land, water, or air. pollution Decisions about how to protect Earth’s atmosphere are made on what level? global Who provides the data that is considered when resolving an environmental issue? environmental scientists What causes a demand for resources to grow? population growth Three general categories of environmental issues. pollution resource use population growth What type of proposals have costs and benefits that are often economic? environmental Can be grouped in two categories, point source and nonpoint source. pollution Fresh water is an example of what type of resource? natural resource Humans depend on natural resources for what two reasons? survival and development Allows resources to last longer. conservation What makes a larger ecological footprint? high level of resource use Using a resource in ways that maintain the resource at a certain quality for a certain period of time. sustainable use Resources that are replaced as fast as they are used. renewable resource Natural resources that were formed over millions of years. oil and coal Determines a population’s life or death. health and disease Today’s human population of Earth. more than 7.1 billion Experts agree or disagree over whether the human population will stop growing? disagree Do people live longer in most areas of the world today than ever in human history? yes Occurs when a population grows at an ever-increasing rate. exponential growth Advances in what have improved human health and allowed for tremendous population growth? medicine and technology As the human population grows, the demand for what increases? natural resources If population and the demand for natural resources continue to grow, will the human population be too large for Earth to support? yes An area with a large population of valuable ocean organisms. fishery Raising water-dwelling organisms for food in an artificial pond. aquaculture Why can forests be renewable resources? New trees can be planted to replace trees that are cut down Cutting down only some trees in a forest. selective cutting Approach to managing fisheries that can involve banning or restricting fishing of certain species. setting fishing limits Fishing methods like poisoning fish with cyanide are outlawed for what reason? to manage resources for a sustainable yield One disadvantage of clear-cutting. erosion How trees help other organisms. they produce oxygen and absorb carbon dioxide What percentage of the US land area is made up of forests? 1/3 Major cause of distinction. habitat destruction Species that could become endangered in the near future. threatened species Prohibits trade or products made from threatened or endangered species. Endangered Species Act The most effective way to preserve biodiversity. protecting whole ecosystems Has both an economic and ecological value within an ecosystem. biodiversity Influences the survival of many other species in an ecosystem. (ex. sea otter) keystone species Affect biodiversity in an ecosystem? climate, area, and diversity The most diverse ecosystems in the world. rain forests How can people directly cause the extinction of some species? habitat destruction hunting