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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. Animals which eat grass and roots.






2. 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.






3. A group of similar organisms capable of interbreeding.






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






5. 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.






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






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






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






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






10. Modern man.






11. 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






12. Consumers which eat decomposing organic material.






13. Water found in estuaries. This water is a mixture of saltine ocean water and fresh water - usually from a river or stream.






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






15. 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.






16. The process by which pollutants are carried by flowing water - such as a river.






17. Consumers which eat only other animals.






18. Any living thing on earth.






19. Animals which eat leaves and shoots.






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






21. 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.






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






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






24. The loss of water vapor from leaves.






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






26. Integrating rows of trees alongside crops to provide mulch and shade - retain water in the soil - and promote sustainable land use.






27. A UN conference held in Rio de Janeiro. The conference decided to protect biodiversity - reduce pollution emissions and greenhouse gasses - and promote sustainable development.






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






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






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






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






32. The place of an organism in an ecosystem - such as what it eats and how it interacts with other organisms.






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






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






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






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






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






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






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






40. Species which react quickly to an environmental change and therefore can be used to diagnose a particular ecosystem.






41. An extinct hominid species believed to have the same brain capacity as modern man and use many different weapons.






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






43. Organisms with a nucleus.






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






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






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






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






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






49. Growing more than one crop at a time.






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







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