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. All of the ecosystems on earth.






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






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






4. A transitional area between two different ecosystems.






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






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






7. Growing more than one crop at a time.






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






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






10. Plants taking in nitrates from the soil.






11. An influential book by Rachel Carson which helped begin the environmental movement.






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






13. The uppermost atmospheric layer. Here satellites orbit the earth.






14. An international convention which created the framework for protecting the ozone layer.






15. The rate at which producers create organic material.






16. 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.






17. Animals which eat leaves and shoots.






18. 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.






19. The middle atmospheric layer. Meteors burn up after entering this layer.






20. 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.






21. An extinct hominid species believed to have the same brain capacity as modern man and use many different weapons.






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






23. Surface run-off caused by melted snow.






24. Consumers which eat only other animals.






25. The amount of variation among organisms living in a particular ecosystem. The loss of this key characteristic leads to a reduction in ecosystem efficiency and the ability of species to adapt to new situations.






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






27. A group of similar organisms capable of interbreeding.






28. 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.






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






30. All of the water found on earth.






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






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






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






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






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






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






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






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






39. The conversion of nitrates into nitrogen gas.






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






41. Consumers which eat decomposing organic material.






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






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






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






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






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






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






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






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






50. Modern man.