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






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






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






4. Organisms which eat other organisms.






5. Modern man.






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






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






8. A layer of gasses surrounding the earth.






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






10. Surface run-off caused by melted snow.






11. A group of similar organisms capable of interbreeding.






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






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






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






15. 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.






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






17. Animals which eat grass and roots.






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






19. The crust and upper mantle of the earth.






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






21. Organisms which consume autotrophs for food.






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






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






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






25. 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.






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






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






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






29. The rate at which producers create organic material.






30. 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.






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






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






33. Plants taking in nitrates from the soil.






34. Organisms with a nucleus.






35. The conversion of nitrates into nitrogen gas.






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






37. 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.






38. Animals which eat leaves and shoots.






39. A forest characterized by clearly differentiated seasons - such as the trees loosing leaves in the fall and heavy snowfall in the winter.






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






41. A variety of species living together.






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






43. Consumers which eat only other animals.






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






45. 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.






46. Single-celled organisms which lack a nucleus.






47. 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.






48. All of the water found on earth.






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






50. An international protocol designed to stabilize global warming.







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