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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. 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.






2. Animals which eat grass and roots.






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






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






5. Exceptionally acidic (low pH) rain. This phenomenon is caused mainly by emissions of carbon dioxide - sulfur dioxide - and nitrogen oxide which react with water particles in the air.






6. Growing only one crop at a time.






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






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






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






10. All of the ecosystems on earth.






11. Plants taking in nitrates from the soil.






12. The coexistence of two species using the same resource where the two will use the resource in different ways.






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






14. An international protocol designed to stabilize global warming.






15. An agency created to establish regulations concerning pollutants to protect humans and the environment.






16. The process of planting trees in between other crops.






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






18. 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.






19. A philosophy that extends ethics to non-humans. Under this system - animals - plants - and other aspects of the environment are seen as being deserving of justice and consideration.






20. A transitional area between two different ecosystems.






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






22. 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.






23. Different species living in close contact with each other.






24. An extinct hominid species believed to be the last common ancestor between man and apes.






25. Single-celled organisms which lack a nucleus.






26. Populations characterized by small size - short lifespan - and lots of offspring.






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






28. Organisms which thrive in high nutrient environments - especially those with plenty of carbon.






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






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






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






32. The decomposition of organic nitrogen into inorganic ammonium. This process is also called mineralization.






33. The uppermost atmospheric layer. Here satellites orbit the earth.






34. The southern-most continent - of which 98% is ice. This continent includes 70% of the world's fresh water - and 90% of the world's ice. Although the average temperature is -49






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






36. A layer of gasses surrounding the earth.






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






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






39. Growing more than one crop at a time.






40. A type of symbiosis where one species will benefit while the other will be neither benefit or be harmed.






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






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






43. Also called that water cycle - this process describes the cycling of water throughout the environment. The stages of this cycle are evaporation - condensation - transportation - precipitation - infiltration and percolation - and run off.






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






45. 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.






46. Modern man.






47. Average expected birth rate for 1 -000 women.






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






49. The process by which certain kinds of bacteria convert atmospheric nitrogen gas into ammonia - a form accessible to living creatures.






50. A theory that our current ecological problems are a product of deeper social problems.







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