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Ecology Chapter 2
Ecology Chapter 2
22
Science
7th Grade
07/02/2010

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Term
evaporation
Definition
the change of a substance from a liquid to a gas
Term
condensation
Definition
the change of state from a gas to a liquid
Term
precipitation
Definition
any form of water that falls to the Earth's surface from the clouds
Term
decomposition
Definition
the breakdown of substances into simpler molecular substances
Term
combustion
Definition
the burning of a substance
Term
succession
Definition
the replacement of one type of community by another at a single place over a period of time
Term
pioneer species
Definition
a species that colonizes an uninhabited area and that starts a process of succession
Term
runoff
Definition
precipitation that falls on land and flows directly to a water supply rather than seeping into the soil.
Term
ground water
Definition
Precipitation that seeps into the ground, where it is stored in underground caverns or porous rock
Term
transpiration
Definition
The process in which plants give off water and return it to the environment
Term
What two compounds does carbon become a part of in the carbon cycle?
Definition
Carbon dioxide and Food
Term
Decomposition
Definition
The breakdown of dead materials into carbon dioxide and water
Term
what 3 processes release carbon dioxide into the atmosphere?
Definition
respiration, combustion, decomposition
Term
fossil fuel
Definition
petroleum, oil, gas, or coal that is formed from the remains of long dead organisms
Term
photosynthesis
Definition
The process by which plants use carbon dioxide from the air to make sugars
Term
respiration
Definition
The process by which sugar molecules are broken down to release energy along with the byproducts of carbon dioxide and water
Term
respiration
Definition
The process by which sugar molecules are broken down to release energy along with the byproducts of carbon dioxide and water
Term
global warming
Definition
increase in temperature of the Earth due to an increase in CO2 in the atmosphere, trapping heat
Term
What two ways can nitrogen become usable?
Definition
lightning or nitrogen fixing bacteria
Term
function of nitrogen in the body
Definition
protein (muscles) and DNA
Term
primary succession
Definition
type of succession that occurs on barren rock
Term
secondary succession
Definition
type of succession that occurs in an abandoned field
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