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






2. Growing more than one crop at a time.






3. An international protocol designed to stabilize global warming.






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






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






6. 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.






7. All of the water found on earth.






8. The process of planting different plant species right next to each other to maximize one's yield.






9. The amount of variation among organisms living in a particular ecosystem. The loss of this key characteristic leads to a reduction in ecosystem efficiency and the ability of species to adapt to new situations.






10. The flow of water in the water table.






11. Animals which eat leaves and shoots.






12. Growing only one crop at a time.






13. 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.






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






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






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






17. A situation where a layer of warmer air traps lower - cooler air - causing pollution to collect near the ground.






18. 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.






19. Consumers which eat both plants and animals.






20. Surface run-off caused by melted snow.






21. Organisms which consume autotrophs for food.






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






23. Modern man.






24. Plants taking in nitrates from the soil.






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






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






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






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. Any living thing on earth.






30. 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.






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






32. Consumers which eat only other animals.






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






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






35. An act which established and enforced acceptable levels of air pollution.






36. Single-celled organisms which lack a nucleus.






37. Organisms which produce their own food.






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






39. The rate at which producers create organic material.






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






41. 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.






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






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






44. 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.






45. 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.






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






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






48. The crust and upper mantle of the earth.






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






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