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






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






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






4. Organisms which produce their own food.






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






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






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






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






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






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






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






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






13. The flow of water in the water table.






14. 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.






15. All of the ecosystems on earth.






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






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






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






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






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






21. Growing more than one crop at a time.






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






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






24. Surface run-off caused by melted snow.






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






26. An extinct hominid species believed to have long - ape-like arms; have a brain capacity half that of modern men; and use primitive tools.






27. 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.






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






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






30. Growing only one crop at a time.






31. 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






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






33. A greenhouse gas. Although it is a natural part of the carbon cycle - the atmospheric concentration of this gas has increased due to the burning of fossil fuels.






34. 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.






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






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






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






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






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






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






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






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






43. Consumers which eat both plants and animals.






44. 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.






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






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






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






48. Modern man.






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






50. The rate at which producers create organic material.