food chains

• herbivores only eat plants and are primary consumers
• carnivores only eat meat and are secondary consumers
• omnivores eat plants and animals
• producer➡️ primary consumer ➡️ secondary consumer ➡️ tertiary consumer
• 1st trophic level ➡️ 2nd trophic level ➡️ 3rd trophic level ➡️ 4th trophic level
• a pyramid of biomass is more accurate to the amount of energy and energy transfer

  there is in a food chain
• energy is lost to respiration, death and decay in food chains
• energy transfer decreases in every step of the food chain
• a food chain will not be more than 4/5 steps as there isnt enough energy to sustain more
• energy efficiency= energy transferred/tot. energy x 100
• biomass= no. of organisms in the food chain x dry mass of organisms
• the sun is always the energy source in a food chain