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 surface water entering the soil. This ensures that plants have adequate access to water.






2. Growing more than one crop at a time.






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






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






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






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






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






8. Organisms which consume autotrophs for food.






9. Surface run-off caused by melted snow.






10. The loss of water vapor from leaves.






11. An act which set standards for the amount of pollution in water.






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






13. The cloudiness of a liquid due to small suspended particles.






14. Modern man.






15. Organisms which thrive in high nutrient environments - especially those with plenty of carbon.






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






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






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






19. Single-celled organisms which lack a nucleus.






20. A shubland found primarily in the South-Western United States and Mexico. Fire plays a predominant role in the life-cycle of the plants in this area - the seeds of which will sprout only after a fire.






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






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






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






24. Plants taking in nitrates from the soil.






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






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






27. All of the ecosystems on earth.






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






29. Organisms which eat other organisms.






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






31. The flow of water in the water table.






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






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






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






35. Growing only one crop at a time.






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






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






38. 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






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






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






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






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






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






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






45. The middle atmospheric layer. Meteors burn up after entering this layer.






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






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






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






49. 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.






50. The crust and upper mantle of the earth.