Test your basic knowledge |

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. A UN conference that addressed the growing population problem.






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






3. A rainforest in the temperate zone which receives heavy rainfall.






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






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






6. A group of similar organisms capable of interbreeding.






7. 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.






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






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






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






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






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






13. The place of an organism in an ecosystem - such as what it eats and how it interacts with other organisms.






14. An international protocol designed to stabilize global warming.






15. Evolution in one organism due to change in a related organism.






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






17. 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.






18. 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






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






20. A layer of gasses surrounding the earth.






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






22. Consumers which eat decomposing organic material.






23. 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.






24. The conversion of nitrates into nitrogen gas.






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






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






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






28. 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.






29. The loss of water vapor from leaves.






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






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






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






33. Organisms with a nucleus.






34. Growing only one crop at a time.






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






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






37. 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.






38. The flow of water in the water table.






39. 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.






40. 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.






41. A bloom of phytoplankton in a body of water caused by an abnormal increase in nutrients. This process depletes the water's oxygen level - killing off other aquatic organisms.






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






43. The crust and upper mantle of the earth.






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






45. Any living thing on earth.






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






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






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






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






50. 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