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BMMS 6Science Ch 11
BMMS Science Chapter 11 - Living Resources
| Question | Answer |
|---|---|
| Biome | a region with a certain climate and vegetation |
| Desert | an area that receives less than 25 cm of rain per year |
| Canopy | the tall trees that form a leafy roof in a rain forest |
| Understory | a second layer of shorter trees and vines in a rain forest |
| Grassland | an area that is populated mostly by grasses and other non-woody plants; most grasslands receive 25 to 75 cm of rain per year |
| Savanna | receives as much as 120 cm of rain per year; scattered shrubs and small trees grow on the savanna along with grass |
| Deciduous trees | trees that shed their leaves and grow new leaves every year |
| Estuary | where the fresh water of a rive meets the salt water of the ocean |
| Intertidal zone | the area between the highest high-tide line and the lowest low-tide line |
| Neritic zone | the shallow region that extends over the continental shelf |
| Kelp forests | grow in the cold neritic waters where the bottom is rocky |
| Plankton | tiny organisms that float in the water; algae |
| Renewable resources | a resource that is either always available or is naturally replaced in a relatively short time |
| Clear-cutting | the process of cutting down all the trees in an area at once |
| Selective cutting | cutting down only some of the trees in a forest and leaving a mix of tree sizes and species behind |
| Sustainable yield | the amount of a renewable resource that can be harvested regularly without reducing the future supply |
| Fishery | an area of the ocean with many valuable ocean organisms |
| Aquaculture | the practice of raising fish and other water-dwelling organisms for food |
| Biodiversity | the number of different species in an area |
| Keystone species | a species that influences the survival of many other species in an ecosystem |
| Extinction | the disappearance of all members of a species from Earth |
| Endangered species | species in danger of becoming extinct in the near future |
| Threatened species | species that could become endangered in the near future |
| Habitat destruction | the loss of natural habitat; also a major cause of extinction |
| Poaching | illegal killing or removal of wildlife from their habitats |
| Captive breeding | mating of animals in zoos or wildlife preserves |
Created by:
mrpowers
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