Science

3. Herbivores that feed on green plants in a food chain are called primary consumers, and carnivores that feed on herbivores are , secondary consumers. Carnivores that feed on other carnivores are called , tertiary consumers
5. A unit of energy of one thousand calories (equal to one large calorie)
7. Animals that subsist on a diet consisting only of meat
10. Web: a system of interlocking and interdependent food chains
11. level: each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy
12. the total mass of organisms in a given area or volume

1. an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material
2. is often defined as any organism that eats only plants
4. an animal that feeds on carrion, dead plant material, or refuse
6. is an organism, either a green plant, which is part of the first level of a food chain
8. is an animal that eats both plants and animals for their main food
9. Pyramid: is a graphical model of energy flow in a community