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. Growing more than one crop at a time.






2. An extinct hominid species believed to have long - ape-like arms; have a brain capacity half that of modern men; and use primitive tools.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






18. Organisms with a nucleus.






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






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






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






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






23. Organisms which produce their own food.






24. A variety of species living together.






25. The flow of water in the water table.






26. A transitional area between two different ecosystems.






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






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






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






30. Plants taking in nitrates from the soil.






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






32. 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.






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






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






35. 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






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






37. The conversion of nitrates into nitrogen gas.






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






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






40. 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.






41. Water found in estuaries. This water is a mixture of saltine ocean water and fresh water - usually from a river or stream.






42. A group of similar organisms capable of interbreeding.






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






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






45. Animals which eat grass and roots.






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






47. A type of symbiosis where one species benefit at the expense of the other.






48. 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.






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






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