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 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.






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






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






4. The process of a gas transforming into a liquid.






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






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






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






8. All of the water found on earth.






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






10. Organisms which eat other organisms.






11. 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.






12. The rate at which producers create organic material.






13. Precipitation which does not reach the soil but is instead collected by plants.






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






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






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






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






18. Consumers which eat both plants and animals.






19. The crust and upper mantle of the earth.






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






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






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






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






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






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






26. 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






27. A type of symbiosis where one species benefit at the expense of the other.






28. 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.






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






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






31. Single-celled organisms which lack a nucleus.






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






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






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






35. Consumers which eat decomposing organic material.






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






37. Organisms which produce their own food.






38. The loss of water vapor from leaves.






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






40. The biggest atmospheric layer. Without ozone - UV radiation causes ionization and the auroras in this layer.






41. Organisms with a nucleus.






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






43. Modern man.






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






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






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






47. A shubland found primarily in the South-Western United States and Mexico. Fire plays a predominant role in the life-cycle of the plants in this area - the seeds of which will sprout only after a fire.






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






49. An act requiring federal agencies to detail the impact of proposed environmental policies.






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