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. Animals which eat grass and roots.






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






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






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






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






6. Biomes with less than 10 inches of rain a year. Foliage is scarce in these areas - and remaining plants and animals work hard to conserve the little water they receive.






7. The loss of water vapor from leaves.






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






9. Consumers which eat both plants and animals.






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






11. A group of similar organisms capable of interbreeding.






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






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






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






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






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






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






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






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






20. Any living thing on earth.






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






22. 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






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






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






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






26. 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.






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






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






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






30. 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.






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






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






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






34. An act which required the EPA to set standards for drinking water.






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






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






37. The amount of variation among organisms living in a particular ecosystem. The loss of this key characteristic leads to a reduction in ecosystem efficiency and the ability of species to adapt to new situations.






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






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






40. 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.






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






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






43. A shubland found primarily in the South-Western United States and Mexico. Fire plays a predominant role in the life-cycle of the plants in this area - the seeds of which will sprout only after a fire.






44. Single-celled organisms which lack a nucleus.






45. A variety of species living together.






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






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






48. All members of a species which live in the same area.






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






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