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






2. The rate at which producers create organic material.






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






4. 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.






5. 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.






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






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






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






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






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






11. Organisms with a nucleus.






12. A community of species interacting with their nonliving (abiotic) environment.






13. The amount of pests needed before spraying pesticides is economical.






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






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






16. 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.






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






18. Animals which eat leaves and shoots.






19. Animals which eat grass and roots.






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






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






22. Also called that water cycle - this process describes the cycling of water throughout the environment. The stages of this cycle are evaporation - condensation - transportation - precipitation - infiltration and percolation - and run off.






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






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






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






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






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






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






29. Populations characterized by small size - short lifespan - and lots of offspring.






30. The crust and upper mantle of the earth.






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






32. 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.






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






34. 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.






35. An American environmentalist who is famous for promoting the ideas of environmental ethics and wildlife management.






36. Consumers which eat both plants and animals.






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






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






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






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






41. 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.






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






43. Biomes with less than 10 inches of rain a year. Foliage is scarce in these areas - and remaining plants and animals work hard to conserve the little water they receive.






44. Single-celled organisms which lack a nucleus.






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






46. 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






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






48. The second atmospheric layer. The ozone layer is found here - increasing the temperature with altitude.






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






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