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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. Organisms which eat other organisms.






2. Animals which eat grass and roots.






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






4. Consumers which eat both plants and animals.






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






6. An international convention which created the framework for protecting the ozone layer.






7. A group of similar organisms capable of interbreeding.






8. All of the ecosystems on earth.






9. An international protocol designed to stabilize global warming.






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






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






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






13. An extinct hominid species with near the same brain capacity as modern man believed to use fire and stone tools - live a hunter/gatherer lifestyle - and speak a language.






14. An especially potent greenhouse gas emitted during production and transportation of fossil fuels - decomposition of organic matter - and herds of livestock.






15. 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






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






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






18. Organisms which consume autotrophs for food.






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






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






21. 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.






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






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






24. A layer of gasses surrounding the earth.






25. A variety of species living together.






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






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






28. An act which required the EPA to set standards for drinking water.






29. The flow of water in the water table.






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






31. Consumers which eat only other animals.






32. Any living thing on earth.






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






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






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






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






37. Organisms which produce their own food.






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






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






40. 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.






41. Plants taking in nitrates from the soil.






42. Condensed water vapor which falls to earth. This comes in many forms - such as rain - snow - ice - and hail.






43. A type of symbiosis where one species will benefit while the other will be neither benefit or be harmed.






44. 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.






45. A type of symbiosis where each species will benefit from interacting with the other.






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






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






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






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






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







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