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 leaves and shoots.






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






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






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






5. Surface run-off caused by melted snow.






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






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






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






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






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






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






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






13. 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.






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






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






16. An international protocol designed to stabilize global warming.






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






18. Species which serve key roles in an ecosystem. The absence of these important organisms is detrimental to the surrounding area.






19. An act created to protect endangered and threatened species.






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






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






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






23. Organisms which consume autotrophs for food.






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






25. Single-celled organisms which lack a nucleus.






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






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






28. A transitional area between two different ecosystems.






29. Growing more than one crop at a time.






30. A variety of species living together.






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






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






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






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






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






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






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






38. The flow of water in the water table.






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






40. 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.






41. Organisms which eat other organisms.






42. All of the ecosystems on earth.






43. The infiltration of harmful chemicals - particles - or biological matter into the atmosphere which endanger living organisms. Pollutants include sulfur and nitrogen oxides - ammonia - and chlorofluorocarbons. Although there are natural sources for th






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






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






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






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






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






49. 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.






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