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 community of similar living organisms largely affected by the area's climate.






2. The conversion of nitrates into nitrogen gas.






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






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






5. 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.






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






7. Surface run-off caused by melted snow.






8. Species which react quickly to an environmental change and therefore can be used to diagnose a particular ecosystem.






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






10. All of the water found on earth.






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






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






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






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






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






16. A group of similar organisms capable of interbreeding.






17. A theory that our current ecological problems are a product of deeper social problems.






18. Modern man.






19. 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.






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






21. A situation where a layer of warmer air traps lower - cooler air - causing pollution to collect near the ground.






22. The cloudiness of a liquid due to small suspended particles.






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






24. The biggest atmospheric layer. Without ozone - UV radiation causes ionization and the auroras in this layer.






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






26. A layer of gasses surrounding the earth.






27. Plants taking in nitrates from the soil.






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






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






30. Growing only one crop at a time.






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






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






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






34. All of the ecosystems on earth.






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






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






37. Consumers which eat only other animals.






38. 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






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






40. Any living thing on earth.






41. A variety of species living together.






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






43. Consumers which eat both plants and animals.






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






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






46. Animals which eat leaves and shoots.






47. 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.






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






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






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