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 of planting trees in between other crops.






2. Organisms which eat other organisms.






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






4. An international protocol designed to stabilize global warming.






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






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






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






8. An unstable form of oxygen which protects the earth from UV radiation. Although naturally occurring in the stratosphere (upper atmosphere) - in the lower atmosphere this gas acts as a pollutant.






9. Consumers which eat decomposing organic material.






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






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






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






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






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






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






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






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






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






19. The rate at which producers create organic material.






20. A forest found in temperate regions with warm summers - cool winters - and plenty of rainfall. These kinds of forests are characterized by evergreens and deciduous trees.






21. Organisms which consume autotrophs for food.






22. Consumers which eat both plants and animals.






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






24. 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.






25. Modern man.






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






27. A group of similar organisms capable of interbreeding.






28. A layer of gasses surrounding the earth.






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






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






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






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






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. Organisms with a nucleus.






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






36. 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.






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






38. 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.






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






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






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






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






43. 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.






44. Single-celled organisms which lack a nucleus.






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






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






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






48. 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.






49. The combination of evaporation from the ocean - lakes - and other bodies of water and transpiration - the loss of water from plants.






50. All of the ecosystems on earth.