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






2. The conversion of nitrates into nitrogen gas.






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






4. 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.






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






6. Organisms which produce their own food.






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






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






9. All of the ecosystems on earth.






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






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






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






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






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






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






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






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






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






19. An act requiring federal agencies to detail the impact of proposed environmental policies.






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






21. 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.






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






23. 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.






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






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






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






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






28. An international protocol designed to stabilize global warming.






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






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






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






32. Evolution in one organism due to change in a related organism.






33. Any living thing on earth.






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






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






36. 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






37. A layer of gasses surrounding the earth.






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






39. Animals which eat grass and roots.






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






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






42. Surface run-off caused by melted snow.






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






44. 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.






45. Areas with only enough rainfall for grasses to grow. As a result - most animals are grazers - such as buffalo.






46. A UN conference held in Rio de Janeiro. The conference decided to protect biodiversity - reduce pollution emissions and greenhouse gasses - and promote sustainable development.






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






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






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






50. Modern man.