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. All of the water found on earth.






2. Growing more than one crop at a time.






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






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






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






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






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






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






9. A community of similar living organisms largely affected by the area's climate.






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






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






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






13. Plants taking in nitrates from the soil.






14. Modern man.






15. An international protocol designed to stabilize global warming.






16. 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.






17. The crust and upper mantle of the earth.






18. 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.






19. Growing only one crop at a time.






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






21. The loss of water vapor from leaves.






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






23. All of the ecosystems on earth.






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






25. Consumers which eat only other animals.






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






27. Any living thing on earth.






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






29. A group of similar organisms capable of interbreeding.






30. Organisms with a nucleus.






31. The southern-most continent - of which 98% is ice. This continent includes 70% of the world's fresh water - and 90% of the world's ice. Although the average temperature is -49






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






33. All members of a species which live in the same area.






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






35. Animals which eat leaves and shoots.






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






37. An act which set standards for the amount of pollution in water.






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






39. An influential book by Rachel Carson which helped begin the environmental movement.






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






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






42. The rate at which producers create organic material.






43. A layer of gasses surrounding the earth.






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






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






46. 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.






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






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






49. 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.






50. The flow of water in the water table.