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 international protocol designed to stabilize global warming.






2. Surface run-off caused by melted snow.






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






4. 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.






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






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






7. Grasslands with short - widely spaced trees and no canopy - allowing for an unbroken layer of grasses beneath.






8. 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.






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






10. The process of planting trees in between other crops.






11. An act which called for the careful examination of new chemicals to ensure they are safe for their intended uses.






12. A type of symbiosis where one species will benefit while the other will be neither benefit or be harmed.






13. Organisms with a nucleus.






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






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






16. Single-celled organisms which lack a nucleus.






17. Consumers which eat decomposing organic material.






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






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






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. 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.






22. The crust and upper mantle of the earth.






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






24. Organisms which eat other organisms.






25. A principle that states that two species competing for a single resource cannot coexist. One species will inevitably gain an advantage over the other - causing the looser either to migrate or to become extinct.






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






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






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






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






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






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






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






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






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






35. 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






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






37. Modern man.






38. Different species living in close contact with each other.






39. Populations characterized by large size - long lifespan - and few offspring.






40. 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.






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






42. The rate at which producers create organic material.






43. A community of similar living organisms largely affected by the area's climate.






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






45. All of the water found on earth.






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






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






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






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






50. Animals which eat leaves and shoots.