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






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






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






4. Organisms which eat other organisms.






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






6. Single-celled organisms which lack a nucleus.






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






8. Plants taking in nitrates from the soil.






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






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






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






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






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






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






15. Surface run-off caused by melted snow.






16. 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.






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






18. 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.






19. A form of management which attempts to satisfy both the needs of humans and those of wildlife in the best way possible for both parties.






20. Organisms which consume autotrophs for food.






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






22. 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.






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






24. 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.






25. The flow of water in the water table.






26. The loss of water vapor from leaves.






27. Organisms which produce their own food.






28. A group of similar organisms capable of interbreeding.






29. A transitional area between two different ecosystems.






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






31. Animals which eat leaves and shoots.






32. Any living thing on earth.






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






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






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






36. Forests found in the northern regions of North America - Europe - and Asia characterized by freezing winters and warmer summers. These forests lie just below the tree line.






37. Grasslands with short - widely spaced trees and no canopy - allowing for an unbroken layer of grasses beneath.






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






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






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






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






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






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






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






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






46. A layer of gasses surrounding the earth.






47. 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.






48. 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.






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






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