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. Animals which eat grass and roots.






2. An act which required the EPA to set standards for drinking water.






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






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






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






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






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






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






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






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






11. 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.






12. All of the water found on earth.






13. 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.






14. 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.






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






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






17. An international protocol designed to stabilize global warming.






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






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






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






21. The crust and upper mantle of the earth.






22. All of the ecosystems on earth.






23. Organisms which produce their own food.






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






25. The process of planting different plant species right next to each other to maximize one's yield.






26. 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






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






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






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






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






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






32. Animals which eat leaves and shoots.






33. 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.






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






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






36. 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.






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






38. The loss of water vapor from leaves.






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






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






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






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






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






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






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






46. Modern man.






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






48. Consumers which eat both plants and animals.






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






50. 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