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






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






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






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






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






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






7. Organisms with a nucleus.






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






9. Consumers which eat decomposing organic material.






10. Single-celled organisms which lack a nucleus.






11. Plants taking in nitrates from the soil.






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






13. Organisms which produce their own food.






14. A transitional area between two different ecosystems.






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






16. 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.






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






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






19. 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.






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






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






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






23. Biomes with less than 10 inches of rain a year. Foliage is scarce in these areas - and remaining plants and animals work hard to conserve the little water they receive.






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






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






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






27. The process by which certain kinds of bacteria convert atmospheric nitrogen gas into ammonia - a form accessible to living creatures.






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






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






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






31. All of the ecosystems on earth.






32. An international convention which created the framework for protecting the ozone layer.






33. 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.






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






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






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






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






38. Surface run-off caused by melted snow.






39. The loss of water vapor from leaves.






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






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






42. Species which react quickly to an environmental change and therefore can be used to diagnose a particular ecosystem.






43. A variety of species living together.






44. The amount of variation among organisms living in a particular ecosystem. The loss of this key characteristic leads to a reduction in ecosystem efficiency and the ability of species to adapt to new situations.






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






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






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






48. An international protocol designed to stabilize global warming.






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






50. Organisms which eat other organisms.