food chains and pyramids. Flashcards
what is the word equation for photosynthesis?
carbon dioxide + water → glucose + oxygen.
what is the symbol equation for photosynthesis?
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.
define food chain.
network of links that show the transfer of energy from one organism to another.
define producer.
absorb energy from sun, uses it to make glucose. glucose passed on as energy to the next organism.
define herbivore.
animal that feeds on plants.
define carnivore.
animal that feeds on other animals.
define omnivore.
animal that feeds on plants and animals.
define apex predator.
carnivore with no predators.
what is the term for each stage in the food chain, give an example and what trophic level it is?
producer- grass- TL1.
primary consumer- grasshopper- TL2.
secondary consumer- frog- TL3.
tertiary consumer- python- TL4.
quaternary consumer- eagle- TL5 (apex predator.)
what is passed on at each level?
energy.
what is the role of pyramids of number?
show the number of organisms at each stage in a food chain.
what is the role of pyramids of biomass?
show the mass of organisms at each stage in a food chain.
define biomass.
total mass of the living material that is found in an organism, multiplied by the number of organisms that can be found.
how much of the energy in a trophic level is transferred to the one above it?
10%
what happens to the efficiency of food chains along a chain?
decrease.
