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. Animals which eat grass and roots.






3. 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.






4. A layer of gasses surrounding the earth.






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






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






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






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






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






10. 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.






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






12. A UN conference held in Rio de Janeiro. The conference decided to protect biodiversity - reduce pollution emissions and greenhouse gasses - and promote sustainable development.






13. Political organizations not affiliated with the government which try to bring about social change.






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






15. Organisms which produce their own food.






16. Plants taking in nitrates from the soil.






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






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






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






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






21. All of the ecosystems on earth.






22. The rate at which producers create organic material.






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






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






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






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






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






28. 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.






29. A transitional area between two different ecosystems.






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






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






32. The loss of water vapor from leaves.






33. Growing only one crop at a time.






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






35. Growing more than one crop at a time.






36. The amount of pests needed before spraying pesticides is economical.






37. An act which called for the careful examination of new chemicals to ensure they are safe for their intended uses.






38. Surface run-off caused by melted snow.






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






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






41. 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.






42. The conversion of nitrates into nitrogen gas.






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






44. 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






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






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






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






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






49. Animals which eat leaves and shoots.






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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests