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. Different species living in close contact with each other.






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






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






4. The cloudiness of a liquid due to small suspended particles.






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






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






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






8. 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.






9. Animals which eat leaves and shoots.






10. Growing more than one crop at a time.






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






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






13. Consumers which eat decomposing organic material.






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






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






16. The crust and upper mantle of the earth.






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






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






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






20. 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.






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






22. A forest characterized by clearly differentiated seasons - such as the trees loosing leaves in the fall and heavy snowfall in the winter.






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






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






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






26. A group of similar organisms capable of interbreeding.






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






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






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






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






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






32. Organisms which produce their own food.






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






34. Consumers which eat both plants and animals.






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






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






37. Any living thing on earth.






38. An international protocol designed to stabilize global warming.






39. 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.






40. 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.






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






42. The spraying of pesticides to prevent a pest problem before it happens.






43. 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.






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






45. Plants taking in nitrates from the soil.






46. Organisms which eat other organisms.






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






48. 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.






49. The conversion of nitrates into nitrogen gas.






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