Flashcards in September 21 Deck (23):
What is the second law of thermodynamics?
Energy is always lost to hear in a transfer
Quality is always less
More energy transfers = _______ energy lost
Hydro power emits ______ gas
Nuclear power produces ______ of energy but the waste is _______
Lots, non disposable
Name three flow resources.
True or false
Green house gases disrupt earths equilibrium of solar radiation
True, we keep to much in the atmosphere
What are autotrophs?
The bottom of the food chain that product their own nutrition. Producers.
What is a heterotroph?
Something that consumes something else for nutrition.
The higher up the food chain you go the _____ energy is available
What are the two types of autotrophs?
What is the euphotic zone?
The top layer of the ocean that receives light and has lots of oxygen emitted by phytoplankton
Oceans hold 50% _____ carbon dioxide than the atmosphere
What is a biotic pyramid?
It shows a food chain but it shows how much energy is lost per level.
True or false
Biotic pyramids reflect the first law of thermodynamics.
False, they reflect the second law of thermodynamics, that energy is lost to heat in transfer
What is an umbrella species?
A species that can be looked at to reflect an entire food chain
A good indicator species.
To sustain more people we should eat _____ on the food chain because there is _______ energy there.
What is a keystone species?
A species that is critical to a food web, a good umbrella species and indicator species.
What is a focal species?
The species most commonly observed
A decadent ecosystem means it is a __________ ecosystem
Identify the variables:
NPP - R = GPP
NPP = net primary productivity
R = autotrophic respiration
GPP = gross primary productivity
What does gross primary productivity refer to in terms of biological ecosystems.
The rate of solar energy to biomass
What does autotrophic respiration refer to?
The cost of an organism.