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EGR 102 CH 11

Terms in this set (25)

Biomass
a) is a form of solar energy
b) can be used to produce electricity
c) refers principally to wood, and animal and human waste
d) will likely increase in use because it is an abundant source of energy
e) all of the above
all of the above..?
Which mechanism fixes carbon in green plants as simple sugars?
photosynthesis
biomass energy refers generally to
solid waste
an organism that eats both plant and animal matter is called a
omnivore
a network of interrelated food sources in a given area is called a
food web
if 0.1% of solar energy that falls on the earth is captured by plants, and 2% of that energy is involved in photosynthesis, what fraction of sunlight that hits the earth is converted to food?
pretty sure it's .00002 when you do the math, but prof. O made .0002 the answer in the weakest link
what kind of organisms can produce their own food?
autotrophs
the sun is not the source of which of the following?
a) biogas
b) coal
c) wind
d) uranium
e) hydro
uranium
organisms that depend on other organisms for their food are called
heterotrophs
if you eat a frog that eats insects which, in turn, eat plants, you would be a
tertiary consumer
respiration is
the reverse of photosynthesis
incineration is
burning biomass at a very high temp
incineration
a) is becoming the most popular way to produce energy at very low costs
b) is the process of choice for making large volumes of biofuels from garbage
c) is not clean and produces harmful by-products that are highly toxic to humans and animals
d) is best for disposing of metals and plastics
e) all of the above
is not clean and produces harmful by-products that are highly toxic to humans and animals
pyrolysis is
the breaking down of biomass matter by using heat in the absence of oxygen
wood and other biomass account for about ___ % of US energy consumption.
3-5% if not including food, 10-20% if including food....ask prof O before class for which he wants
the best approach to dealing with the huge volume of trash in America is to
produce less trash
which of the following is not considered a biofuel?
a) gasohol
b) hydrogen
c) algae
d) biodiesel
e) animal dung
hydrogen
what's the primary source of biodiesel?
oil seeds
2nd generation biofuels refer to
cellulosic biofuel
organisms in the ecosystem that are responsible for the recycling of plant and animal wastes are
decomposers
thermal treatment of biomass into a gaseous fuel in the presence of only a limited amount of oxygen is called
gasification
the best approach to reducing waste is
reducing consumption
which of these CANNOT be used to make biodiesel?
a) engine oil
b) animal fat
c) fish oil
d) vegetable oil
e) all of the above
engine oil
in ecosystems, nutrients
are reduced by a factor of 10 from one tropic level to the next
with current technologies, the most promising class of biomass to produce biodiesel appears to be
the book mentions algae being a promising source of biodiesel, but it's still in the developmental stages. It also says biodiesel is primarily made with oil seeds. ask before class/.
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