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. 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.






2. Consumers which eat both plants and animals.






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






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






5. Organisms which consume autotrophs for food.






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






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






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






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






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






11. The loss of water vapor from leaves.






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






13. A type of farming where the farmer will fell and burn down trees to grow crops. After a few years - he will move on and continue the process.






14. 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.






15. Surface run-off caused by melted snow.






16. Consumers which eat only other animals.






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






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






19. Plants taking in nitrates from the soil.






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






21. Organisms with a nucleus.






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






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






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






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






26. 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.






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






28. The rate at which producers create organic material.






29. Growing more than one crop at a time.






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






31. 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.






32. 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.






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. A layer of gasses surrounding the earth.






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






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






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






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






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






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






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






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






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






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






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






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






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






48. 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.






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






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