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






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






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






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






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






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






7. The crust and upper mantle of the earth.






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






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






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






11. The flow of water in the water table.






12. 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.






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






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






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






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






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






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






19. A forest found in temperate regions with warm summers - cool winters - and plenty of rainfall. These kinds of forests are characterized by evergreens and deciduous trees.






20. Organisms which produce their own food.






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






22. 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.






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






24. Plants taking in nitrates from the soil.






25. A group of similar organisms capable of interbreeding.






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






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






28. The rate at which producers create organic material.






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






30. A layer of gasses surrounding the earth.






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






32. Consumers which eat only other animals.






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






34. Surface run-off caused by melted snow.






35. 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






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






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






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






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






40. Any living thing on earth.






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






42. Single-celled organisms which lack a nucleus.






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






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






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






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






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






48. A form of management which attempts to satisfy both the needs of humans and those of wildlife in the best way possible for both parties.






49. 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.






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