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






2. Organisms which produce their own food.






3. The conversion of nitrates into nitrogen gas.






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






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






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






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






8. Also called that water cycle - this process describes the cycling of water throughout the environment. The stages of this cycle are evaporation - condensation - transportation - precipitation - infiltration and percolation - and run off.






9. 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.






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






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






12. The flow of water in the water table.






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






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






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






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






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






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






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






20. Biomes with less than 10 inches of rain a year. Foliage is scarce in these areas - and remaining plants and animals work hard to conserve the little water they receive.






21. The rate at which producers create organic material.






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






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






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






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






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






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






28. 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.






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






30. 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.






31. 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.






32. 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






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






34. Organisms with a nucleus.






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






36. The loss of water vapor from leaves.






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






38. Species which serve key roles in an ecosystem. The absence of these important organisms is detrimental to the surrounding area.






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






40. A group of similar organisms capable of interbreeding.






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






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






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






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






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






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






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






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






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






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