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. An international protocol designed to stabilize global warming.






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






3. Consumers which eat both plants and animals.






4. An international organization designed to promote free trade between countries.






5. Modern man.






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






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






8. A group of similar organisms capable of interbreeding.






9. Species which react quickly to an environmental change and therefore can be used to diagnose a particular ecosystem.






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






11. The conversion of nitrates into nitrogen gas.






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






13. 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.






14. 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.






15. Animals which eat grass and roots.






16. 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.






17. A transitional area between two different ecosystems.






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






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






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






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






22. A greenhouse gas which also plays a key role in regulating ozone levels.






23. All of the ecosystems on earth.






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






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






26. 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.






27. Single-celled organisms which lack a nucleus.






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






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






31. Organisms which produce their own food.






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






33. Consumers which eat decomposing organic material.






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






35. A layer of gasses surrounding the earth.






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






37. 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.






38. The study of the interaction between organisms and their environment.






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






40. Animals which eat leaves and shoots.






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






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






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






44. Organisms with a nucleus.






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






46. 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.






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






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






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






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