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Ch 23
Biology
27
Biology
Undergraduate 2
04/27/2012

Additional Biology Flashcards

 


 

Cards

Term
Temperature is increasing faster at the _______ _______ than at its equator
Definition
Earth's poles
Term
Climate change can shorten or
______________ of crops and therefore affect the ____________ _____ ________ ____________.
Definition
Livelihoods of area farmers.
Term
________ __________ provide a way to measure biological and atmospheric conditions from the distant past.
Definition
Ice cores
Term
______ ___ ________ representing a time frame covering thousands of years can be extracted from glaciers.
Definition
Cylinders of ice
Term
_______ _______ present in the ice reveal the atmospheric composition thousands of years ago.
Definition
Gas bubbles
Term
How are present day carbon dioxide levels are measured?
Definition
Directly from the air.
Term
Carbon cycle
Definition
describes the movement of carbon atoms between organic molecules and inorganic CO2 via natural processes.
Term
Greenhouse gases
Definition
Carbon dioxide
Methane Nitrous Oxide
Term
What are the role of greenhouse gases to global warming?
Definition
They absorb some of the radiated heat, keeping the atmosphere and the surface o the earth warm.
Term
What human activities are increasing the levels of greenhouse gases?
Definition
Burning Fossil Fuels
Methane from Cattle
Deforestation
Rice Agriculture
Concrete Production
Term
How are historic carbon dioxide levels measured?
Definition
In glacial Ice Cores: they contain layers of ice harboring gas bubbles.
Term
Stratosphere
Definition
contains ozone layers
Term
Troposphere
Definition
contains most of atmospheric gases
Term
Ozone Depleting Substances: Accounting for 80% of total stratospheric ozone depletion.
Definition
Chlorofluorocarbons
Methyl Chloroform
Carbon Tetrachloride
Hydrofluorocarbons (HCFCs)
Term
Nitrogen atoms cycle
Definition
From organisms to the soil, water, and air and back to organisms.
Term
Phosphorus cycles
Definition
Primarily through soil, water, and organisms.
Term
Energy Flow
Definition
Primary producers-photosynthesis
Primary consumers-herbivores
Secondary consumers-carnivores
Tertiary consumers- carnivorous carnivores
Detritivores- Decomposers
Term
Primary productivity
Definition
Carbon fixed by photosynthesis
Term
Gross primary productivity
Definition
Total carbon fixed/ unit time
(Total material produced through photosynthesis)
Term
Net primary productivity
Definition
Carbon fixed minus carbon lost through cellular respiration. (amount of material plant accumulates)
Term
The Food Web
Definition
Top - Quaternary Consumers (eat tertiary consumers)
Tertiary Consumers (eat secondary consumers)
Secondary Consumers (eat primary consumers)
Primary Consumers (eat producers)
Producers (plants)
Term
Who is Rachel Carson?
Definition
Warned that the use of pesticides such as DDT was causing population declines in many non-target organisms. (1962)
Term
Percentage of Fresh Water and Salt Water
Definition
97.5%
2.5%
Term
What does aquifers store?
Definition
Ground water
Term
Earth;s Tilt and the Seasons
Definition
Vernal equinox (March 21-22)
Winter Solstice (December 21-22
Autumnal Equinox (September 22-23)
Summer Solstice (June 21-22)
Term
Types of biomes
Definition
Desert, coniferous forest, tundra, temperate Deciduous forest, tropical forest, grassland, aquatic marine, aquatic freshwater
Term
Why are ecosystems dynamic?
Definition
Because the biotic and abiotic parts of an ecosystem can and do change, ecosystems are not static entities.
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