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. Excess water which cannot be infiltrated into the soil and instead flows along the ground.






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






3. Consumers which eat both plants and animals.






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






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






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






8. Animals which eat grass and roots.






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






10. 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.






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






12. Organisms with a nucleus.






13. 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.






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






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






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






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






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






19. A group of similar organisms capable of interbreeding.






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






21. Surface run-off caused by melted snow.






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






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






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






25. 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.






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






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






28. Modern man.






29. 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.






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






31. A transitional area between two different ecosystems.






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






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. A variety of species living together.






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






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






37. The process of planting trees in between other crops.






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






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






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






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






42. Growing more than one crop at a time.






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






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






45. 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.






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






47. 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.






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






49. Animals which eat leaves and shoots.






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