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






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






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






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






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






6. Single-celled organisms which lack a nucleus.






7. 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.






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






9. 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.






10. Political organizations not affiliated with the government which try to bring about social change.






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






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






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






14. Any living thing on earth.






15. Consumers which eat only other animals.






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






17. Organisms with a nucleus.






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






19. Organisms which produce their own food.






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






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






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






23. The flow of water in the water table.






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






25. An especially potent greenhouse gas emitted during production and transportation of fossil fuels - decomposition of organic matter - and herds of livestock.






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






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






28. An extinct hominid species believed to exhibit the first example of full-time bipedalism.






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






30. Consumers which eat decomposing organic material.






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






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






33. 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.






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






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






36. 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.






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






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






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






40. All of the water found on earth.






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






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






43. An international protocol designed to stabilize global warming.






44. 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.






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






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






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






48. Populations characterized by large size - long lifespan - and few offspring.






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






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