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. 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.






2. The amount of variation among organisms living in a particular ecosystem. The loss of this key characteristic leads to a reduction in ecosystem efficiency and the ability of species to adapt to new situations.






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






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






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






6. An influential book by Rachel Carson which helped begin the environmental movement.






7. Organisms which consume autotrophs for food.






8. 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.






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






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






11. Consumers which eat only other animals.






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






13. A layer of gasses surrounding the earth.






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






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






16. Organisms with a nucleus.






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






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






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






20. 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.






21. All of the ecosystems on earth.






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






23. All of the water found on earth.






24. 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






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






26. Consumers which eat decomposing organic material.






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






28. The crust and upper mantle of the earth.






29. The rate at which producers create organic material.






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






31. An extinct hominid species with near the same brain capacity as modern man believed to use fire and stone tools - live a hunter/gatherer lifestyle - and speak a language.






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






33. 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.






34. 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.






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






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






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






38. Modern man.






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






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






41. Growing only one crop at a time.






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






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






44. Animals which eat grass and roots.






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






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






47. The conversion of nitrates into nitrogen gas.






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






49. A variety of species living together.






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