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






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






3. 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.






4. Modern man.






5. Organisms which eat other organisms.






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






7. Organisms which produce their own food.






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






9. Biomes far north in North America - Europe - and Asia which - due to very low temperatures - cannot support tree growth.






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






11. 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.






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






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






14. Consumers which eat only other animals.






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






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






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






18. 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.






19. 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.






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






21. Animals which eat grass and roots.






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






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






24. Surface run-off caused by melted snow.






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






26. Plants taking in nitrates from the soil.






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






28. The second atmospheric layer. The ozone layer is found here - increasing the temperature with altitude.






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






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






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






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






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






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






35. The conversion of nitrates into nitrogen gas.






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






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






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






39. Areas with only enough rainfall for grasses to grow. As a result - most animals are grazers - such as buffalo.






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






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






42. The crust and upper mantle of the earth.






43. 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.






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






45. 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.






46. 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.






47. All of the ecosystems on earth.






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






49. All of the water found on earth.






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