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. Single-celled organisms which lack a nucleus.






2. The cycling and reusing of elements and molecules (such as water - nitrogen - and phosphorus) that are essential to life.






3. Growing only one crop at a time.






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






5. Any living thing on earth.






6. 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






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






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






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






10. Plants taking in nitrates from the soil.






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






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






13. 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






14. Surface run-off caused by melted snow.






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






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






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






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






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






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






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






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






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






24. A variety of species living together.






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






26. 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.






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






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






29. The rate at which producers create organic material.






30. Consumers which eat decomposing organic material.






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






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






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






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






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






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






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






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






39. A transitional area between two different ecosystems.






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






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






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






43. The rapid increase of harmful algae in a body of water.






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






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






46. 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.






47. 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.






48. All of the water found on earth.






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






50. The UN's first major conference on environmental issues.