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






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






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






4. 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.






5. Organisms which eat other organisms.






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






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






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






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






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






11. The conversion of nitrates into nitrogen gas.






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






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






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






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






16. 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.






17. Consumers which eat both plants and animals.






18. Organisms which consume autotrophs for food.






19. The process by which a new species is created. This process generally requires geographic isolation to prevent interbreeding between the newly emerging species and the parent species.






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






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






22. The flow of water in the water table.






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






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






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






26. Growing more than one crop at a time.






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






28. Animals which eat leaves and shoots.






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






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






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






32. A variety of species living together.






33. Growing only one crop at a time.






34. An unstable form of oxygen which protects the earth from UV radiation. Although naturally occurring in the stratosphere (upper atmosphere) - in the lower atmosphere this gas acts as a pollutant.






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






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






37. All members of a species which live in the same area.






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






39. 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.






40. The rate at which producers create organic material.






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






42. A type of symbiosis where one species benefit at the expense of the other.






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






44. The loss of water vapor from leaves.






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






46. A bloom of phytoplankton in a body of water caused by an abnormal increase in nutrients. This process depletes the water's oxygen level - killing off other aquatic organisms.






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






48. A group of similar organisms capable of interbreeding.






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






50. An act created to protect endangered and threatened species.