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






2. Modern man.






3. A principle that states that two species competing for a single resource cannot coexist. One species will inevitably gain an advantage over the other - causing the looser either to migrate or to become extinct.






4. 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.






5. Consumers which eat only other animals.






6. The infiltration of harmful chemicals - particles - or biological matter into the atmosphere which endanger living organisms. Pollutants include sulfur and nitrogen oxides - ammonia - and chlorofluorocarbons. Although there are natural sources for th






7. 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






8. Plants taking in nitrates from the soil.






9. 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.






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






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






12. Surface run-off caused by melted snow.






13. 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.






14. Organisms which produce their own food.






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






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






17. Animals which eat leaves and shoots.






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






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






20. 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.






21. An American environmentalist who is famous for promoting the ideas of environmental ethics and wildlife management.






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






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






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






25. An international protocol designed to stabilize global warming.






26. Water found in estuaries. This water is a mixture of saltine ocean water and fresh water - usually from a river or stream.






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






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






29. A group of similar organisms capable of interbreeding.






30. All of the water found on earth.






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






32. Any living thing on earth.






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






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






35. Consumers which eat both plants and animals.






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






37. A layer of gasses surrounding the earth.






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






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






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






41. An act which called for the careful examination of new chemicals to ensure they are safe for their intended uses.






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






43. 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.






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






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






46. A rainforest in the temperate zone which receives heavy rainfall.






47. An extinct hominid species believed to have long - ape-like arms; have a brain capacity half that of modern men; and use primitive tools.






48. A community of species interacting with their nonliving (abiotic) environment.






49. Organisms which consume autotrophs for food.






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