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. The process of a gas transforming into a liquid.






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






3. Animals which eat leaves and shoots.






4. A philosophy that extends ethics to non-humans. Under this system - animals - plants - and other aspects of the environment are seen as being deserving of justice and consideration.






5. The crust and upper mantle of the earth.






6. The conversion of nitrates into nitrogen gas.






7. Organisms which produce their own food.






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






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






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






11. Consumers which eat only other animals.






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






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






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






15. An act requiring federal agencies to detail the impact of proposed environmental policies.






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






17. 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.






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






19. The infiltration of harmful chemicals - particles - or biological matter into the atmosphere which endanger living organisms. Pollutants include sulfur and nitrogen oxides - ammonia - and chlorofluorocarbons. Although there are natural sources for th






20. Surface run-off caused by melted snow.






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






22. 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.






23. The oxification of ammonia by certain bacterium into nitrite and later into nitrates - which can then be used by plants.






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






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






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






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






28. A theory that our current ecological problems are a product of deeper social problems.






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






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






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






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






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






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






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






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






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






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






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






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






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






42. A greenhouse gas. Although it is a natural part of the carbon cycle - the atmospheric concentration of this gas has increased due to the burning of fossil fuels.






43. 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.






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






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






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






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






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






49. Organisms with a nucleus.






50. Consumers which eat decomposing organic material.