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 amount of pests needed before spraying pesticides is economical.






2. Animals which eat grass and roots.






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






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






5. 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.






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






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






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






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






10. Growing only one crop at a time.






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






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






13. 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.






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






15. A shubland found primarily in the South-Western United States and Mexico. Fire plays a predominant role in the life-cycle of the plants in this area - the seeds of which will sprout only after a fire.






16. The flow of water in the water table.






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






18. An international protocol designed to stabilize global warming.






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






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






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






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






23. Surface run-off caused by melted snow.






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






25. A group of similar organisms capable of interbreeding.






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






27. 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.






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






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






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






31. The process by which a new species is created. This process generally requires geographic isolation to prevent interbreeding between the newly emerging species and the parent species.






32. Organisms which produce their own food.






33. All of the ecosystems on earth.






34. A community of species interacting with their nonliving (abiotic) environment.






35. 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.






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






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






38. 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.






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






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






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






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. Organisms which eat other organisms.






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






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






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






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






48. 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.






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






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