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






2. A group of similar organisms capable of interbreeding.






3. Consumers which eat both plants and animals.






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






5. The rate at which producers create organic material.






6. A layer of gasses surrounding the earth.






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






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






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






10. Organisms which consume autotrophs for food.






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






12. Areas with only enough rainfall for grasses to grow. As a result - most animals are grazers - such as buffalo.






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






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






15. 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.






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






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






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






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






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






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






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






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






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






25. Consumers which eat decomposing organic material.






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






27. Animals which eat leaves and shoots.






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






29. The conversion of nitrates into nitrogen gas.






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






31. 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.






32. A philosophy that extends ethics to non-humans. Under this system - animals - plants - and other aspects of the environment are seen as being deserving of justice and consideration.






33. Surface run-off caused by melted snow.






34. 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.






35. The loss of water vapor from leaves.






36. 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.






37. 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.






38. An unstable form of oxygen which protects the earth from UV radiation. Although naturally occurring in the stratosphere (upper atmosphere) - in the lower atmosphere this gas acts as a pollutant.






39. A type of symbiosis where one species benefit at the expense of the other.






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






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






42. A variety of species living together.






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






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






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






46. Species which serve key roles in an ecosystem. The absence of these important organisms is detrimental to the surrounding area.






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






48. An international organization designed to promote free trade between countries.






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






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







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