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






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






3. Modern man.






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






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






6. The loss of water vapor from leaves.






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






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






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






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






11. Organisms which produce their own food.






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






13. The crust and upper mantle of the earth.






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






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






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






17. All of the water found on earth.






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






19. Growing only one crop at a time.






20. The combination of evaporation from the ocean - lakes - and other bodies of water and transpiration - the loss of water from plants.






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






22. 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






23. A greenhouse gas which also plays a key role in regulating ozone levels.






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






25. 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.






26. Organisms with a nucleus.






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






28. 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.






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






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






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






32. Animals which eat grass and roots.






33. 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.






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






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






36. A variety of species living together.






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






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






39. The conversion of nitrates into nitrogen gas.






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






41. Consumers which eat both plants and animals.






42. The rate at which producers create organic material.






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






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






45. Organisms which eat other organisms.






46. An international protocol designed to stabilize global warming.






47. Plants taking in nitrates from the soil.






48. 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.






49. A greenhouse gas. Although it is a natural part of the carbon cycle - the atmospheric concentration of this gas has increased due to the burning of fossil fuels.






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