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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 extinct hominid species believed to be the last common ancestor between man and apes.
Coevolution
Deciduous Forest
Sahelanthropus Tchadensis
Brackish Water
2. Evolution in one organism due to change in a related organism.
Coevolution
Prokaryotes
Coniferous Forest
Montreal Protocol
3. All of the water found on earth.
World Trade Organization
Evaporation
Tundra
Hydrosphere
4. The cloudiness of a liquid due to small suspended particles.
Wilderness Act
Indicator Species
Turbidity
Commensalism
5. An especially potent greenhouse gas emitted during production and transportation of fossil fuels - decomposition of organic matter - and herds of livestock.
Eukaryotes
Ecosystem
Methane
Non-government Organizations
6. All of the ecosystems on earth.
Biogeochemical Cycle
Homo Habilis
Biosphere
Methane
7. All members of a species which live in the same area.
Air Pollution
Exosphere
Population
Methane
8. Organisms which consume autotrophs for food.
Subsurface flow
Producers
Hetrotrophs
Biogeochemical Cycle
9. A transitional area between two different ecosystems.
R-Selected Populations
K-Selected Populations
Ecotone
Thermosphere
10. Animals which eat grass and roots.
Earth Summit
Grazers
Commensalism
Montreal Protocol
11. The oxification of ammonia by certain bacterium into nitrite and later into nitrates - which can then be used by plants.
Homo Habilis
Endangered Species Act
Nitrogen Fixation
Nitrification
12. 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
Air Pollution
Sublimation
Prokaryotes
Autotrophs
13. The area between the troposphere and the stratosphere. Here the temperature reverses from decreasing to increasing with altitude.
Ammonification
Alley Cropping
Tropopause
Oligotrophs
14. 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.
World Trade Organization
Lithosphere
Ecology
Hydrologic Cycle
15. The process of planting trees in between other crops.
Alley Cropping
Air Pollution
Indicator Species
Tundra
16. The second atmospheric layer. The ozone layer is found here - increasing the temperature with altitude.
Stratosphere
Assimilation
Total Fertility Rate
Tropical Rain Forest
17. 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.
Tropical Rain Forest
Ecology
Toxic Substances Control Act
Evaporation
18. 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.
Brackish Water
Competitive Exclusion
Polyculture
Homo Sapiens
19. The process of a substance passing directly from the solid phase to the gaseous phase - and vice versa.
Estuary
Insurance Spraying
Coevolution
Sublimation
20. The spraying of pesticides to keep produce from any injuries or damage.
Cosmetic Spraying
Parasitism
Prokaryotes
Snowmelt
21. An American environmentalist who is famous for promoting the ideas of environmental ethics and wildlife management.
Aldo Leopold
R-Selected Populations
Subsistence Farming
Brackish Water
22. The middle atmospheric layer. Meteors burn up after entering this layer.
Precipitation
Neanderthals
Evapotranspiration
Mesosphere
23. Species which react quickly to an environmental change and therefore can be used to diagnose a particular ecosystem.
Hydrologic Cycle
Savannah
Silent Spring
Indicator Species
24. The process by which pollutants are carried by flowing water - such as a river.
Nitrous Oxide
Assimilation
Advection
Total Fertility Rate
25. A group of similar organisms capable of interbreeding.
Evaporation
Commensalism
Species
Indicator Species
26. Organisms which thrive in low nutrient environments and usually have slow growth rates.
Oligotrophs
Trophic Level
R-Selected Populations
Savannah
27. A type of symbiosis where one species benefit at the expense of the other.
Homo Erectus
Parasitism
Mutualism
Economic Threshold
28. An extinct hominid species believed to have the same brain capacity as modern man and use many different weapons.
Ecology
Neanderthals
Polyculture
Environmental Protection Agency
29. Areas with only enough rainfall for grasses to grow. As a result - most animals are grazers - such as buffalo.
Exosphere
Grasslands
Methane
Subsurface flow
30. The UN's first major conference on environmental issues.
Stockholm Conference
Polyculture
Vienna Convention for the Protection of the Ozone Layer
Tundra
31. Organisms which produce their own food.
Chaparral
Oligotrophs
Autotrophs
Transpiration
32. An international protocol designed to stabilize global warming.
Kyoto Protocol
Grazers
Taiga
Infiltration
33. An act requiring federal agencies to detail the impact of proposed environmental policies.
Wildlife Management
Lithosphere
Autotrophs
National Environmental Policy Act
34. A partially enclosed part of the ocean with rivers or streams flowing into it.
Estuary
Trophic Level
National Environmental Policy Act
Deciduous Forest
35. An extinct hominid species believed to exhibit the first example of full-time bipedalism.
Australopithecus Afarensis
Biodiversity
Vienna Convention for the Protection of the Ozone Layer
Montreal Protocol
36. Water found in estuaries. This water is a mixture of saltine ocean water and fresh water - usually from a river or stream.
Neanderthals
Deserts
Homo Sapiens
Brackish Water
37. A greenhouse gas which also plays a key role in regulating ozone levels.
Commensalism
Nitrous Oxide
Wildlife Management
Environmental Protection Agency
38. A layer of gasses surrounding the earth.
Condensation
Resource Partitioning
Atmosphere
Harmful Algal Bloom
39. Species which serve key roles in an ecosystem. The absence of these important organisms is detrimental to the surrounding area.
Copiotrophs
Keystone Species
Clean Air Act
K-Selected Populations
40. Exceptionally acidic (low pH) rain. This phenomenon is caused mainly by emissions of carbon dioxide - sulfur dioxide - and nitrogen oxide which react with water particles in the air.
Agroforestry
Atmosphere
Acid Rain
World Trade Organization
41. An act which set standards for the amount of pollution in water.
Montreal Protocol
Water Pollution Control Act
Alley Cropping
Grasslands
42. The combination of evaporation from the ocean - lakes - and other bodies of water and transpiration - the loss of water from plants.
Earth Summit
Sublimation
Evapotranspiration
Shifting Agriculture
43. The process of surface water entering the soil. This ensures that plants have adequate access to water.
Browsers
Nitrous Oxide
Atmosphere
Infiltration
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.
Biodiversity
Nitrification
Competitive Exclusion
Commensalism
45. The amount of pests needed before spraying pesticides is economical.
Ecosystem
Economic Threshold
Air Pollution
Insurance Spraying
46. The spraying of pesticides to prevent a pest problem before it happens.
Gross Primary Product
Advection
Insurance Spraying
Social Ecology
47. Organisms which eat other organisms.
Nitrous Oxide
Prokaryotes
Consumers
Sublimation
48. The biggest atmospheric layer. Without ozone - UV radiation causes ionization and the auroras in this layer.
Thermosphere
Stratosphere
Hydrologic Cycle
Australopithecus Afarensis
49. A type of symbiosis where each species will benefit from interacting with the other.
Mutualism
R-Selected Populations
Parasitism
Detrivores
50. The process of a gas transforming into a liquid.
Coevolution
Eutrophication
Condensation
Biomes