1What is the main source of energy for most ecosystems?
Sunlight
2What energy transformation occurs during photosynthesis?
Light energy is transformed into chemical energy stored in organic molecules
3Name two chemical inputs needed for photosynthesis
Carbon dioxide and water
4What is the main purpose of cellular respiration?
To release energy from organic molecules and make it available for celluar processes
5What is a trophic level?
A feeding position ina food chain or food web
6What do the arrows in a food chain show?
The direction of energy and matter transfer, from the organism eaten to the organism that eats it
7Why is less energy available at higher trophic levels?
Energy is lost as heat during respiration, and some biomass is not eaten or assimilated
8If 10 percent of 1000 kJ is transferred to the next trophic level, how much energy is transferred?
100