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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. Populations characterized by large size - long lifespan - and few offspring.






2. Organisms which produce their own food.






3. Growing more than one crop at a time.






4. All of the water found on earth.






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






6. A UN conference held in Rio de Janeiro. The conference decided to protect biodiversity - reduce pollution emissions and greenhouse gasses - and promote sustainable development.






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






8. Species which serve key roles in an ecosystem. The absence of these important organisms is detrimental to the surrounding area.






9. A variety of species living together.






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






11. An act which required the EPA to set standards for drinking water.






12. An act which set standards for the amount of pollution in water.






13. Water found in estuaries. This water is a mixture of saltine ocean water and fresh water - usually from a river or stream.






14. Condensed water vapor which falls to earth. This comes in many forms - such as rain - snow - ice - and hail.






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






16. Political organizations not affiliated with the government which try to bring about social change.






17. An especially potent greenhouse gas emitted during production and transportation of fossil fuels - decomposition of organic matter - and herds of livestock.






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






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






20. 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.






21. A UN conference that addressed the growing population problem.






22. Consumers which eat only other animals.






23. Organisms which thrive in low nutrient environments and usually have slow growth rates.






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






25. The crust and upper mantle of the earth.






26. The area between the troposphere and the stratosphere. Here the temperature reverses from decreasing to increasing with altitude.






27. 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.






28. Integrating rows of trees alongside crops to provide mulch and shade - retain water in the soil - and promote sustainable land use.






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






30. An extinct hominid species believed to exhibit the first example of full-time bipedalism.






31. Organisms with a nucleus.






32. The middle atmospheric layer. Meteors burn up after entering this layer.






33. Biomes far north in North America - Europe - and Asia which - due to very low temperatures - cannot support tree growth.






34. A transitional area between two different ecosystems.






35. The process of a substance passing directly from the solid phase to the gaseous phase - and vice versa.






36. A forest near the equator with heavy rainfall and a great diversity of plant and animal life. Although a mere 2% of the earth is covered with these forests - they contain 50-80% of earth's land species.






37. Growing only one crop at a time.






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






39. The amount of pests needed before spraying pesticides is economical.






40. The flow of water in the water table.






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






42. The position of an organism on the food chain.






43. 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.






44. An American environmentalist who is famous for promoting the ideas of environmental ethics and wildlife management.






45. An international protocol designed to stabilize global warming.






46. Plants taking in nitrates from the soil.






47. A community of species interacting with their nonliving (abiotic) environment.






48. 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.






49. The rate at which producers create organic material.






50. A law designed to locate toxic waste sites - gauge their pollution level - and ensure these sites are taken care of properly.







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