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. Any living thing on earth.






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






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






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






5. Organisms which eat other organisms.






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






7. All of the water found on earth.






8. The flow of water in the water table.






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






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






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






12. 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.






13. Single-celled organisms which lack a nucleus.






14. 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.






15. Organisms which consume autotrophs for food.






16. Consumers which eat both plants and animals.






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






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






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






20. Evolution in one organism due to change in a related organism.






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






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






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






24. A variety of species living together.






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 group of similar organisms capable of interbreeding.






27. Average expected birth rate for 1 -000 women.






28. All of the ecosystems on earth.






29. An international protocol designed to protect the ozone layer by phasing out the production of CFCs and other harmful chemicals.






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






31. 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.






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






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






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






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






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






37. Animals which eat leaves and shoots.






38. 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.






39. Organisms with a nucleus.






40. 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.






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






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






43. 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.






44. The decomposition of organic nitrogen into inorganic ammonium. This process is also called mineralization.






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






46. Organisms which produce their own food.






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






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






49. The UN's first major conference on environmental issues.






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