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






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






3. A group of similar organisms capable of interbreeding.






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






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






6. Grasslands with short - widely spaced trees and no canopy - allowing for an unbroken layer of grasses beneath.






7. Organisms which consume autotrophs for food.






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






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






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






11. 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.






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






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






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






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






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






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






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






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






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






21. Any living thing on earth.






22. Organisms with a nucleus.






23. 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.






24. Plants taking in nitrates from the soil.






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






26. A layer of gasses surrounding the earth.






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






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






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






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






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






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






34. 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.






35. Growing more than one crop at a time.






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






37. Consumers which eat only other animals.






38. 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.






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






40. Animals which eat grass and roots.






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






42. Consumers which eat both plants and animals.






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






44. 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.






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






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






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






48. The flow of water in the water table.






49. An international protocol designed to stabilize global warming.






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