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Environmental science exam one
sciencey science. ch 1-4 i think?
44
Environmental Studies
Undergraduate 3
09/20/2015

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Term
The systematic study of our environment and our place in it.
Definition
environmental science
Term
What are some environmental challenges our planet faces? CHCEABM
Definition
Climate change

Hunger

Clean Water

Energy resources

Air quality

Biodiversity Loss

Marine resources
Term
What are three signs of progress regarding the environment?
Definition
Renewable energy, conservation of forests and nature preserves, population stabilized
Term
What is sustainability?
Definition
a search for long term ecological
stability and human progress.
Term
What is sustainable development?
Definition
A real increase in well-being and standard of life for the average person that can be maintained over the long term without degrading the environment or compromising the ability of future generations to meet their own needs

"meeting the needs of the present without c ompromising the ability of future generations to
meet their own needs"
Term
What are ecosystem services?
Definition
resources or services provided by environmental systems
Term
a systematic, precise, objective study of a problem. generally requires observation, hypothesis development and testing, data gathering, and interpretation.
Definition
the scientific method
Term
What is an example of an ecological service?
Definition
photosynthesis
Term
a measure of how likely something is to occur.

not what will happen, but what is likely to happen.
Definition
probability
Term
Anything that has mass and takes up space
Definition
matter
Term
What does matter consist of?
Definition
Elements and compounds
Term
Unique properties that cannot be broken down chemically into other substances. example- gold, silver
Definition
elements
Term
two or more different elements bonded together in fixed proportions

ex- water (hydrogen and oxygen), carbon dioxide (carbon and oxygen)
Definition
compounds
Term
The smallest unit of matter in which an element can be divided and still retain a chemical property.
Definition
atom
Term
What are atoms made of? What are their charges?
Definition
Subatomic particles

Protons- positive charge

Neutrons- no electrical charge

Electrons- negatively charged
Term
Which subatomic particles give the atom mass and where are they located?
Definition
The proton and neutron and they are located in the atom's nucleus
Term
What is pH? What does it measure? What is the scale?
Definition
the negative logarithm of of its concentration of H+ ions

measures acidity

scale- 1 is battery acid- most acidic. , 14 is liquid drain cleaner- more basic. 7 is water.

alkaline solutions have a pH greater than 7

acids have a pH less than 7
Term
two or more atoms of the same or different elements held together by chemical bonds
Definition
molecule
Term
What is the Law of Conservation of Matter?
Definition
When matter undergoes a physical or chemical change, no atoms are created or destroyed.
Term
Know the difference between kinetic and potential energy and an example of each
Definition
kinetic energy:Heat Transferred by radiation, conduction, or convection. example: electromagnetic radiation

potential energy:stored energy. a rock at the edge of a cliff
Term
What is the first law of thermodynamics?
Definition
Energy cannot be created or destroyed; Energy input always equals energy output
Term
What is the second law of thermodynamics?
Definition
Energy always goes from a more useful to a less useful form when it changes from
one form to another
Term
a network of interdependent components and processes with materials and energy flowing from one component of
the system to another.
Definition
system
Term
what is a state variable?
Definition
(also called compartments),which store resources such as energy, matter, or water.
Term
what are flows?
Definition
the pathways by which those resources move from one state variable to another.
Term
What is the difference between a positive and negative feedback loop? Know an example of each.
Definition
A positive feedback loop
tends to increase a process
or component.
• A negative feedback loop
diminishes a process or
component.

examples: positive- a pair of rabbits produces several baby rabbits, reproduction leads to bigger rabbit population

negative- if population growth goes out of control, starvation will reverse or slow this growth
Term
what is a food web and the different trophic levels?

TSPP
Definition
individual food chains that become interconnected

tertiary consumers (top carnivores)-lion

secondary consumers (carnivores)- aardvark

primary consumers (herbivores)-bugs grasshopper harvester ant

primary producers (autotrophs)-grass, trees
Term
Where does photosynthesis occur?
Definition
Chloroplasts
Term
what does photosynthesis rely on?
Definition
Chlorophyl and two interconnected reactions known as the light dependent and the light.
Term
what is cellular respiration?
Definition
the reverse of photosynthesis.
Term
What is the equation for photosynthesis?
Definition
6H20 +6CO2 +solar energy------>C6H12O6 (sugar) + 6O2
Term
what is the equation for cellular respiration?
Definition
C6H12O6+6O2-------->6H2O + 6CO2 + released energy
Term
process of the fittest individuals passing their
traits to the next generation is called
Definition
natural selection
Term
a theory that explains how random changes in genetic material and competition for scarce resources cause species to change gradually.
Definition
evolution
Term
what is resource partitioning?
Definition
when a species disappears or develops a new niche, exploiting resources differently
Term
Competition for a limited quantity of resources occurs in all ecosystems. This competition can be interspecific or intraspecific. Explain some of the ways an organism might deal with these different types of competition
Definition
Interspecific- resource partitioning

intraspecific- direct fighting for resources, honing a species' attributes
Term
Describe and give an example of the three types of symbiotic relationships
Definition
Mutualism (+/+): both species clearly benefit . ex- lichens
• Commensalism (+/0): one member benefits and the other apparently is neither benefited nor harmed. ex- types of mosses in the moist tropics
• Parasitism (+/‐): one partner benefits while the
other is harmed (a type of predation).
Term
The process in which species exert selective pressure on each other and gradually evolve new features or behaviors as a result of those pressures
Definition
coevolution
Term
species that depend on a high rate of reproduction and growth to secure a place in their environment.
Definition
r selected species. example: dandelion
Term
organisms that produce more conservatively with longer generation times, late sexual maturity, and fewer young
Definition
k selected species. example: elephant
Term
what is the equation for exponential growth? what does the graph look like?
Definition
dN/dt=rN

a j

n=number of individuals
t= time
r=rate of growth
Term
what is the logistic growth model? what does it look like?
Definition
dn/dt=rn (k-N)/K

an s
Term
Describe the pattern of human population growth over the past 200 years. What is the shape of the growth curve?
Definition
"J" shape, increased
Term
occurs when the birth rate equals the death rate (r 0)
Definition
zero population growth
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