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. Growing only one crop at a time.






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






3. Consumers which eat only other animals.






4. 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.






5. The conversion of nitrates into nitrogen gas.






6. A layer of gasses surrounding the earth.






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






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






9. 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.






10. 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.






11. An international protocol designed to stabilize global warming.






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






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






14. The cycling and reusing of elements and molecules (such as water - nitrogen - and phosphorus) that are essential to life.






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






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






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






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






19. Animals which eat grass and roots.






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






21. Plants taking in nitrates from the soil.






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






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






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






25. 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.






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






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






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






29. Organisms which produce their own food.






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






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






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






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






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






35. A type of farming where the farmer will grow just enough crops to satisfy his family's needs for the next year.






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






37. The loss of water vapor from leaves.






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






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






40. 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.






41. A group of similar organisms capable of interbreeding.






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






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






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






45. 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.






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






47. The flow of water in the water table.






48. 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.






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






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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests