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






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






3. Organisms with a nucleus.






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






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






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






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






8. Any living thing on earth.






9. Consumers which eat both plants and animals.






10. Plants taking in nitrates from the soil.






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






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






13. All of the ecosystems on earth.






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






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






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






17. An international protocol designed to stabilize global warming.






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






19. Surface run-off caused by melted snow.






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






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






22. Consumers which eat only other animals.






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






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






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






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






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






28. A forest near the equator with heavy rainfall and a great diversity of plant and animal life. Although a mere 2% of the earth is covered with these forests - they contain 50-80% of earth's land species.






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






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






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






32. 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.






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






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






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






36. An act requiring federal agencies to detail the impact of proposed environmental policies.






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






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






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






40. Organisms which consume autotrophs for food.






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






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






43. Animals which eat leaves and shoots.






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






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






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






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






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






49. The conversion of nitrates into nitrogen gas.






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