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. Consumers which eat only other animals.






2. Modern man.






3. Organisms which produce their own food.






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






5. 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.






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






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






8. Growing more than one crop at a time.






9. A group of similar organisms capable of interbreeding.






10. An act requiring federal agencies to detail the impact of proposed environmental policies.






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






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






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






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






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






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






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






18. 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.






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






20. An agency created to establish regulations concerning pollutants to protect humans and the environment.






21. Animals which eat leaves and shoots.






22. 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.






23. Organisms which consume autotrophs for food.






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






25. 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.






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






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






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






29. Plants taking in nitrates from the soil.






30. Organisms with a nucleus.






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






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






33. The position of an organism on the food chain.






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






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






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






37. Surface run-off caused by melted snow.






38. Any living thing on earth.






39. 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






40. The conversion of nitrates into nitrogen gas.






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






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






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






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






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






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






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






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






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






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