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DSST Environment And Humanity

Subjects : dsst, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Integrating rows of trees alongside crops to provide mulch and shade - retain water in the soil - and promote sustainable land use.






2. The rapid increase of harmful algae in a body of water.






3. All members of a species which live in the same area.






4. A type of symbiosis where each species will benefit from interacting with the other.






5. An extinct hominid species believed to have the same brain capacity as modern man and use many different weapons.






6. The process by which a new species is created. This process generally requires geographic isolation to prevent interbreeding between the newly emerging species and the parent species.






7. A group of similar organisms capable of interbreeding.






8. An act which protects certain lands as national parks.






9. A transitional area between two different ecosystems.






10. Grasslands with short - widely spaced trees and no canopy - allowing for an unbroken layer of grasses beneath.






11. An act which called for the careful examination of new chemicals to ensure they are safe for their intended uses.






12. An international protocol designed to protect the ozone layer by phasing out the production of CFCs and other harmful chemicals.






13. The first atmospheric layer. Most weather and pollution occurs here - and the temperature decreases with altitude.






14. A type of farming where the farmer will grow just enough crops to satisfy his family's needs for the next year.






15. An international convention which created the framework for protecting the ozone layer.






16. Organisms which create their own food out of inorganic (abiotic) substances.






17. The combination of evaporation from the ocean - lakes - and other bodies of water and transpiration - the loss of water from plants.






18. A type of farming where the farmer will grow crops both to fulfill his family's needs for the next year and to sell on the market.






19. The process of planting different plant species right next to each other to maximize one's yield.






20. An extinct hominid species with near the same brain capacity as modern man believed to use fire and stone tools - live a hunter/gatherer lifestyle - and speak a language.






21. Areas with only enough rainfall for grasses to grow. As a result - most animals are grazers - such as buffalo.






22. The rate at which producers create organic material.






23. The process of surface water entering the soil. This ensures that plants have adequate access to water.






24. An act created to protect endangered and threatened species.






25. A partially enclosed part of the ocean with rivers or streams flowing into it.






26. A form of management which attempts to satisfy both the needs of humans and those of wildlife in the best way possible for both parties.






27. The oxification of ammonia by certain bacterium into nitrite and later into nitrates - which can then be used by plants.






28. A community of similar living organisms largely affected by the area's climate.






29. The study of the interaction between organisms and their environment.






30. An international organization designed to promote free trade between countries.






31. An unstable form of oxygen which protects the earth from UV radiation. Although naturally occurring in the stratosphere (upper atmosphere) - in the lower atmosphere this gas acts as a pollutant.






32. Growing more than one crop at a time.






33. The UN's first major conference on environmental issues.






34. The loss of water vapor from leaves.






35. Single-celled organisms which lack a nucleus.






36. A principle that states that two species competing for a single resource cannot coexist. One species will inevitably gain an advantage over the other - causing the looser either to migrate or to become extinct.






37. An extinct hominid species believed to have long - ape-like arms; have a brain capacity half that of modern men; and use primitive tools.






38. Excess water which cannot be infiltrated into the soil and instead flows along the ground.






39. Organisms which produce their own food.






40. The spraying of pesticides to keep produce from any injuries or damage.






41. Forests found in the northern regions of North America - Europe - and Asia characterized by freezing winters and warmer summers. These forests lie just below the tree line.






42. A type of farming where the farmer will fell and burn down trees to grow crops. After a few years - he will move on and continue the process.






43. The cycling and reusing of elements and molecules (such as water - nitrogen - and phosphorus) that are essential to life.






44. The infiltration of harmful chemicals - particles - or biological matter into the atmosphere which endanger living organisms. Pollutants include sulfur and nitrogen oxides - ammonia - and chlorofluorocarbons. Although there are natural sources for th






45. An influential book by Rachel Carson which helped begin the environmental movement.






46. The conversion of nitrates into nitrogen gas.






47. Organisms which eat other organisms.






48. The process by which the sun's energy converts liquid water to water vapor in the atmosphere.






49. Consumers which eat both plants and animals.






50. The process by which pollutants are carried by flowing water - such as a river.