SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
Test your basic knowledge |
DSST Environment And Humanity
Start Test
Study First
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. 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.
Sahelanthropus Tchadensis
Autotrophs
Advection
Ozone
2. The process of surface water entering the soil. This ensures that plants have adequate access to water.
Infiltration
Condensation
Community
Biosphere
3. Condensed water vapor which falls to earth. This comes in many forms - such as rain - snow - ice - and hail.
Symbiosis
Precipitation
Speciation
Species
4. 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.
Stratosphere
Estuary
Speciation
Sahelanthropus Tchadensis
5. An international protocol designed to protect the ozone layer by phasing out the production of CFCs and other harmful chemicals.
Grazers
Keystone Species
Ecotone
Montreal Protocol
6. Growing more than one crop at a time.
Detrivores
Polyculture
Carbon Dioxide
Antarctica
7. A variety of species living together.
Atmosphere
Infiltration
Social Ecology
Community
8. The infiltration of harmful chemicals - particles - or biological matter into the atmosphere which endanger living organisms. Pollutants include sulfur and nitrogen oxides - ammonia - and chlorofluorocarbons. Although there are natural sources for th
Polyculture
Omnivores
Speciation
Air Pollution
9. Integrating rows of trees alongside crops to provide mulch and shade - retain water in the soil - and promote sustainable land use.
Agroforestry
Shifting Agriculture
Savannah
Non-government Organizations
10. Animals which eat grass and roots.
Hydrologic Cycle
Grazers
Stratosphere
Atmosphere
11. Organisms which thrive in low nutrient environments and usually have slow growth rates.
Thermosphere
Oligotrophs
Gross Primary Product
Grasslands
12. An international organization designed to promote free trade between countries.
Oligotrophs
Grazers
Chaparral
World Trade Organization
13. 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.
Chaparral
Agroforestry
National Environmental Policy Act
Trophic Level
14. Organisms which produce their own food.
Atmosphere
Alley Cropping
Autotrophs
Thermosphere
15. A type of farming where the farmer will grow just enough crops to satisfy his family's needs for the next year.
Kyoto Protocol
Subsistence Farming
Species
Condensation
16. The process by which pollutants are carried by flowing water - such as a river.
Agroforestry
Neanderthals
Advection
Alley Cropping
17. The area between the troposphere and the stratosphere. Here the temperature reverses from decreasing to increasing with altitude.
Cosmetic Spraying
Tropical Rain Forest
Methane
Tropopause
18. 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.
Safe Drinking Water Act
Eutrophication
Community
Wildlife Management
19. The cycling and reusing of elements and molecules (such as water - nitrogen - and phosphorus) that are essential to life.
Polyculture
Environmental Ethics
National Environmental Policy Act
Biogeochemical Cycle
20. An act created to protect endangered and threatened species.
Endangered Species Act
Symbiosis
Interplanting
Economic Threshold
21. The position of an organism on the food chain.
Aldo Leopold
Toxic Substances Control Act
Superfund Law
Trophic Level
22. 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.
Biomes
Deserts
Harmful Algal Bloom
Carbon Dioxide
23. The conversion of nitrates into nitrogen gas.
Lithosphere
Water Pollution Control Act
Denitrification
Omnivores
24. Animals which eat leaves and shoots.
Browsers
Savannah
Agroforestry
Competitive Exclusion
25. Biomes far north in North America - Europe - and Asia which - due to very low temperatures - cannot support tree growth.
Insurance Spraying
Toxic Substances Control Act
Lithosphere
Tundra
26. The process of a gas transforming into a liquid.
Water Pollution Control Act
Condensation
Atmosphere
Infiltration
27. An agency created to establish regulations concerning pollutants to protect humans and the environment.
World Trade Organization
Insurance Spraying
Environmental Protection Agency
Ecotone
28. A type of farming where the farmer will grow crops both to fulfill his family's needs for the next year and to sell on the market.
Autotrophs
Intensive Subsistence Farming
Speciation
Hetrotrophs
29. Consumers which eat decomposing organic material.
Atmosphere
Lithosphere
Australopithecus Afarensis
Detrivores
30. The process by which the sun's energy converts liquid water to water vapor in the atmosphere.
Evaporation
Troposphere
Carbon Dioxide
Social Ecology
31. 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.
Competitive Exclusion
Condensation
Estuary
Montreal Protocol
32. Growing only one crop at a time.
Monoculture
Biosphere
Coevolution
Tropical Rain Forest
33. Precipitation which does not reach the soil but is instead collected by plants.
Montreal Protocol
Biomes
Interception
Ecotone
34. Surface run-off caused by melted snow.
Snowmelt
Resource Partitioning
Carnivores
Acid Rain
35. The middle atmospheric layer. Meteors burn up after entering this layer.
Endangered Species Act
Sahelanthropus Tchadensis
Biomes
Mesosphere
36. The study of the interaction between organisms and their environment.
Harmful Algal Bloom
Biomes
Detrivores
Ecology
37. A theory that our current ecological problems are a product of deeper social problems.
Gross Primary Product
Social Ecology
Stockholm Conference
Community
38. Water found in estuaries. This water is a mixture of saltine ocean water and fresh water - usually from a river or stream.
Snowmelt
Parasitism
Brackish Water
Omnivores
39. An international convention which created the framework for protecting the ozone layer.
Carbon Dioxide
Vienna Convention for the Protection of the Ozone Layer
Thermosphere
Stockholm Conference
40. The first atmospheric layer. Most weather and pollution occurs here - and the temperature decreases with altitude.
Troposphere
Assimilation
Water Pollution Control Act
Evapotranspiration
41. The rapid increase of harmful algae in a body of water.
Harmful Algal Bloom
Chaparral
Intensive Subsistence Farming
Hydrologic Cycle
42. An extinct hominid species believed to have the same brain capacity as modern man and use many different weapons.
Indicator Species
Carbon Dioxide
Deserts
Neanderthals
43. 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.
Interplanting
Hydrologic Cycle
Biodiversity
Biogeochemical Cycle
44. The flow of water in the water table.
Denitrification
Clean Air Act
Subsurface flow
Interception
45. The crust and upper mantle of the earth.
Brackish Water
Lithosphere
Commensalism
Autotrophs
46. An especially potent greenhouse gas emitted during production and transportation of fossil fuels - decomposition of organic matter - and herds of livestock.
Taiga
Transpiration
Interplanting
Methane
47. A community of species interacting with their nonliving (abiotic) environment.
Ecosystem
Total Fertility Rate
Interception
National Environmental Policy Act
48. Organisms with a nucleus.
Harmful Algal Bloom
Oligotrophs
Homo Habilis
Eukaryotes
49. The spraying of pesticides to prevent a pest problem before it happens.
Insurance Spraying
Temperature Inversion
Brackish Water
Earth Summit
50. 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.
Endangered Species Act
Ecology
Coniferous Forest
Nitrous Oxide