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31 Cards in this Set
- Front
- Back
What is a typical desert consisting of a large area of sand dunes?
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ERG
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The most common landscape forms in the dry wester US are the basin and range and the____
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BAJADA
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Most alluvial fans provide a mechanism for____
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PARTICLE SORTING
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Dry lake beds with especially heavy salt concentrations
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SALINAS
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What shape does the barchan dune in most deserts have?
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CRESCENT
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In desert areas, what is a 'wash?"
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EPHEMERAL STREAM
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The desert consisting of large reas covered by gravel and pebbles
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REG
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Which landscape form is not a very common important feature in the dry basin and range landscapes of the western US?
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MESA
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The main factor shaping dunes in desert
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WIND PATTERN
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What cycle is the flow of energy, water and nutrients, and driven by solar input
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BIOGEOCHEMICAL CYCLE
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How many known species are there?
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1.5 MILLION
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In the carbon cycle, what is CO2 used for?
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TO CONVERT CARBOHYDRATES
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How does human action release C02 into the atmosphere?
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BURNING FOSSIL FUELS
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Which cycle involves photosynthesis, transpiration, respiration and oxidation?
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OXYGEN CYCLE
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Which cycle can only some organisms use directly?
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NITROGEN CYCLE
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A major impact of humans in the global cycle is to increase the transfer of carbon from ______to the atmosphere
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FOSSIL ORGANIC MATTER
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Burning fossil fuels can produce global warming by ____ the natural greenhouse effect
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ENHANCING
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THe efficiency of energy flow in the biosphere at all steps of the tropic chain is such that energy transfer is MORE/LESS than 20%
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LESS THAN
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The reservoir of carbon in terrestrial plans is ____ sediments and sedimentary rocks
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LARGER THAN
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Is energy in ecosystems a flow or a cycle?
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FLOW
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Which out of photosynthesis and respiration/decomposition, fossilization and burning has a faster exchange or carbon between the atmosphere and the biosphere?
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PHOTOSYNTHESIS AND RESPIRATION
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Oxygen concentration on Earth's atmosphere needs to increase to save current life forms; TRUE OR FALSE?
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FALSE
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Biological diversity is measured by
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NUMBER OF SPECIES OF PLANTS AND ANIMALS
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Flora and Fauna are terms applied to
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PLANTS AND ANIMALS
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The number of species of animals is HIGHER/LOWER than plants
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HIGHER
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The efficiency of energy flow in the biosphere at all steps of the trophic chain is such that losses exceed:
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50%
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Human alter the nitrogen cycle mainly by manufacturing and using_________
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FERTILIZERS
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What is the unit of measurement for ecosystem standing biomass?
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Kg ha-1
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Land use leading to excessive fragmentation of habitat for animals can _________ biological diversity
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DECREASE
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a producer that transforms solar energy to chemical energy, transforms inorganic compounds to organic compounds, and provides food for the herbivores is what type of producer?
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PRIMARY
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Which erosion process shifts particles?
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DEFLATION
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