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 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.






2. 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.






3. The rate at which producers create organic material.






4. The cycling and reusing of elements and molecules (such as water - nitrogen - and phosphorus) that are essential to life.






5. Organisms which produce their own food.






6. Surface run-off caused by melted snow.






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






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






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






10. Organisms which consume autotrophs for food.






11. 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.






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






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






14. A layer of gasses surrounding the earth.






15. A rainforest in the temperate zone which receives heavy rainfall.






16. Consumers which eat only other animals.






17. An international protocol designed to stabilize global warming.






18. Plants taking in nitrates from the soil.






19. Consumers which eat both plants and animals.






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






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






22. 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.






23. The amount of pests needed before spraying pesticides is economical.






24. An act which called for the careful examination of new chemicals to ensure they are safe for their intended uses.






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






26. Consumers which eat decomposing organic material.






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






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






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






30. 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.






31. 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.






32. A variety of species living together.






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






34. 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.






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






36. 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.






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






38. 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.






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






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






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






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






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






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






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






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






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






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






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






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