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






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






3. Growing only one crop at a time.






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






5. Plants taking in nitrates from the soil.






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






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






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






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






10. 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






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






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






13. Organisms which produce their own food.






14. An act which established and enforced acceptable levels of air pollution.






15. 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.






16. 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






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






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






19. A bloom of phytoplankton in a body of water caused by an abnormal increase in nutrients. This process depletes the water's oxygen level - killing off other aquatic organisms.






20. 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.






21. The crust and upper mantle of the earth.






22. A type of symbiosis where one species benefit at the expense of the other.






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






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






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






26. A type of symbiosis where each species will benefit from interacting with the other.






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






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






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






30. Animals which eat leaves and shoots.






31. Organisms which consume autotrophs for food.






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






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






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






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






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






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






38. Consumers which eat only other animals.






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






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






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






42. The conversion of nitrates into nitrogen gas.






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






44. An international protocol designed to stabilize global warming.






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






46. A forest characterized by clearly differentiated seasons - such as the trees loosing leaves in the fall and heavy snowfall in the winter.






47. 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.






48. Animals which eat grass and roots.






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






50. Modern man.