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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. The cycling and reusing of elements and molecules (such as water - nitrogen - and phosphorus) that are essential to life.
Biogeochemical Cycle
Keystone Species
Indicator Species
Prokaryotes
2. A layer of gasses surrounding the earth.
Ecotone
Ecology
Wilderness Act
Atmosphere
3. The position of an organism on the food chain.
Trophic Level
Antarctica
National Environmental Policy Act
Interception
4. The process of a gas transforming into a liquid.
Economic Threshold
Ecotone
Condensation
Insurance Spraying
5. The process by which certain kinds of bacteria convert atmospheric nitrogen gas into ammonia - a form accessible to living creatures.
Community
Turbidity
Symbiosis
Nitrogen Fixation
6. An extinct hominid species believed to have long - ape-like arms; have a brain capacity half that of modern men; and use primitive tools.
Mutualism
Sahelanthropus Tchadensis
Lithosphere
Homo Habilis
7. 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.
Intensive Subsistence Farming
Grazers
Assimilation
Community
8. A forest characterized by clearly differentiated seasons - such as the trees loosing leaves in the fall and heavy snowfall in the winter.
Grasslands
Subsurface flow
Deciduous Forest
Community
9. The rate at which producers create organic material.
Gross Primary Product
Evapotranspiration
Assimilation
Oligotrophs
10. 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.
Omnivores
Ozone
Silent Spring
Condensation
11. The study of the interaction between organisms and their environment.
Ecology
Community
Savannah
Assimilation
12. Consumers which eat decomposing organic material.
Troposphere
Coevolution
Alley Cropping
Detrivores
13. A greenhouse gas which also plays a key role in regulating ozone levels.
Ecosystem
Population
Temperature Inversion
Nitrous Oxide
14. 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.
Ecological Niche
Carbon Dioxide
Nitrification
Biomes
15. The rapid increase of harmful algae in a body of water.
Harmful Algal Bloom
Troposphere
Hydrologic Cycle
Stockholm Conference
16. The middle atmospheric layer. Meteors burn up after entering this layer.
Mutualism
Mesosphere
Speciation
Endangered Species Act
17. Organisms which create their own food out of inorganic (abiotic) substances.
Monoculture
Safe Drinking Water Act
Producers
Surface Run-Off
18. Species which react quickly to an environmental change and therefore can be used to diagnose a particular ecosystem.
World Trade Organization
Evaporation
Estuary
Indicator Species
19. The first atmospheric layer. Most weather and pollution occurs here - and the temperature decreases with altitude.
Homo Sapiens
Coniferous Forest
Troposphere
Browsers
20. 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.
Prokaryotes
Species
Evapotranspiration
Acid Rain
21. 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
Silent Spring
Monoculture
Ammonification
22. An extinct hominid species believed to have the same brain capacity as modern man and use many different weapons.
Intensive Subsistence Farming
Exosphere
Neanderthals
National Environmental Policy Act
23. Consumers which eat both plants and animals.
Agroforestry
Homo Habilis
Endangered Species Act
Omnivores
24. The amount of pests needed before spraying pesticides is economical.
Nitrous Oxide
Lithosphere
Economic Threshold
Ecological Niche
25. 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
Sahelanthropus Tchadensis
Lithosphere
26. Biomes far north in North America - Europe - and Asia which - due to very low temperatures - cannot support tree growth.
Tundra
Methane
Environmental Protection Agency
Copiotrophs
27. An influential book by Rachel Carson which helped begin the environmental movement.
Wildlife Management
Homo Erectus
Silent Spring
Ecotone
28. An international protocol designed to stabilize global warming.
Kyoto Protocol
Endangered Species Act
Nitrous Oxide
Sublimation
29. The UN's first major conference on environmental issues.
Hetrotrophs
Stockholm Conference
Keystone Species
Thermosphere
30. An act which protects certain lands as national parks.
Infiltration
Temperate Rain Forest
Evaporation
Wilderness Act
31. The loss of water vapor from leaves.
Homo Erectus
Community
Transpiration
Savannah
32. Populations characterized by large size - long lifespan - and few offspring.
K-Selected Populations
Coniferous Forest
Turbidity
Deserts
33. An act which required the EPA to set standards for drinking water.
Endangered Species Act
Safe Drinking Water Act
Hydrologic Cycle
Indicator Species
34. Average expected birth rate for 1 -000 women.
Total Fertility Rate
Hydrosphere
Coevolution
Sahelanthropus Tchadensis
35. The area between the troposphere and the stratosphere. Here the temperature reverses from decreasing to increasing with altitude.
Tropopause
Ecosystem
Consumers
Exosphere
36. Organisms which thrive in low nutrient environments and usually have slow growth rates.
Water Pollution Control Act
Evapotranspiration
Oligotrophs
Snowmelt
37. A law designed to locate toxic waste sites - gauge their pollution level - and ensure these sites are taken care of properly.
Surface Run-Off
Economic Threshold
Methane
Superfund Law
38. 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.
Shifting Agriculture
Coniferous Forest
Gross Primary Product
Eutrophication
39. Organisms which consume autotrophs for food.
Superfund Law
Exosphere
Hetrotrophs
Eutrophication
40. A type of farming where the farmer will grow just enough crops to satisfy his family's needs for the next year.
Endangered Species Act
Subsistence Farming
UN Conference on Population and Development
Resource Partitioning
41. All members of a species which live in the same area.
Insurance Spraying
Trophic Level
Population
Montreal Protocol
42. A situation where a layer of warmer air traps lower - cooler air - causing pollution to collect near the ground.
Speciation
UN Conference on Population and Development
Ozone
Temperature Inversion
43. Evolution in one organism due to change in a related organism.
Interplanting
Coevolution
Ecosystem
Atmosphere
44. A group of similar organisms capable of interbreeding.
Community
Species
Alley Cropping
Homo Sapiens
45. Different species living in close contact with each other.
Coniferous Forest
Troposphere
Homo Sapiens
Symbiosis
46. An American environmentalist who is famous for promoting the ideas of environmental ethics and wildlife management.
Temperate Rain Forest
Carnivores
Deciduous Forest
Aldo Leopold
47. 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.
Shifting Agriculture
Homo Habilis
Savannah
World Trade Organization
48. Growing only one crop at a time.
Mesosphere
Omnivores
Homo Habilis
Monoculture
49. Excess water which cannot be infiltrated into the soil and instead flows along the ground.
Acid Rain
Competitive Exclusion
Carbon Dioxide
Surface Run-Off
50. A philosophy that extends ethics to non-humans. Under this system - animals - plants - and other aspects of the environment are seen as being deserving of justice and consideration.
Environmental Ethics
Harmful Algal Bloom
Tropical Rain Forest
Coevolution