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31 Cards in this Set

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