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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. The conversion of nitrates into nitrogen gas.






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






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






4. 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.






5. Growing only one crop at a time.






6. Consumers which eat decomposing organic material.






7. The loss of water vapor from leaves.






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






9. Organisms with a nucleus.






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






11. An international protocol designed to stabilize global warming.






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






13. A layer of gasses surrounding the earth.






14. Animals which eat grass and roots.






15. Modern man.






16. 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.






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






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






19. Single-celled organisms which lack a nucleus.






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






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






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






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






24. 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.






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






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






27. Consumers which eat only other animals.






28. 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.






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






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






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






32. 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.






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






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






35. The process by which the sun's energy converts liquid water to water vapor in the atmosphere.






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






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






38. Growing more than one crop at a time.






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






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






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






42. Consumers which eat both plants and animals.






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






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






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






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






47. Organisms which produce their own food.






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






49. The flow of water in the water table.






50. 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.







Sorry!:) No result found.

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