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






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






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






5. The rate at which producers create organic material.






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






7. 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.






8. 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.






9. A variety of species living together.






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






11. The decomposition of organic nitrogen into inorganic ammonium. This process is also called mineralization.






12. Organisms which eat other organisms.






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






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






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






16. Organisms which consume autotrophs for food.






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






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






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






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






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






22. The process of planting different plant species right next to each other to maximize one's yield.






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






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






25. A rainforest in the temperate zone which receives heavy rainfall.






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






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






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






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






30. Organisms which produce their own food.






31. Surface run-off caused by melted snow.






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






33. Animals which eat leaves and shoots.






34. Any living thing on earth.






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






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






37. Animals which eat grass and roots.






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






39. Consumers which eat only other animals.






40. 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.






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






42. An extinct hominid species with near the same brain capacity as modern man believed to use fire and stone tools - live a hunter/gatherer lifestyle - and speak a language.






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. Consumers which eat both plants and animals.






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






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






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






48. The oxification of ammonia by certain bacterium into nitrite and later into nitrates - which can then be used by plants.






49. 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.






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