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. Organisms which eat other organisms.






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






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






4. 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.






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






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






7. Forests found in the northern regions of North America - Europe - and Asia characterized by freezing winters and warmer summers. These forests lie just below the tree line.






8. The conversion of nitrates into nitrogen gas.






9. 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.






10. Populations characterized by large size - long lifespan - and few offspring.






11. 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.






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






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






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






15. A transitional area between two different ecosystems.






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






17. Consumers which eat only other animals.






18. Modern man.






19. The loss of water vapor from leaves.






20. The flow of water in the water table.






21. 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.






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






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






24. All of the ecosystems on earth.






25. The rate at which producers create organic material.






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






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






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






29. Surface run-off caused by melted snow.






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






31. Any living thing on earth.






32. Consumers which eat both plants and animals.






33. 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.






34. Biomes with less than 10 inches of rain a year. Foliage is scarce in these areas - and remaining plants and animals work hard to conserve the little water they receive.






35. Animals which eat grass and roots.






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






37. 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.






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






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






40. 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.






41. A layer of gasses surrounding the earth.






42. An international protocol designed to stabilize global warming.






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






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






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






46. 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.






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






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






49. Growing only one crop at a time.






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