7th grade energy flow

1. At each level of the food chain, about 90% of the energy is lost in the form of heat. The total energy passed from one level to the next is only about one-tenth of the energy received from the previous organism. Therefore, as you move up the food chain, there is less energy available.

3. Sun has 1 liter (1000 ml) Plant receives -100 ml Plant has 100 ml Mouse receives 10 ml Mouse has 10 ml Hawk Receives 1 ml Hawk dies has 1 ml Decomposers receive . 1 ml

4. Energy Pyramids show the flow of energy through an ecosystem Ecologists study energy pyramids

5. 3 rd level consumers mostly carnivores & some omnivores 2 nd level consumer carnivores & omnivores 1 st level consumer herbivores Producers: green plants make their own energy from sunlight 10,000 Kcal 1000 Kcal 100 Kcal 10 Kcal 1 Kcal An energy pyramid from the Andrews

6. 10,000 Kcal 1000 Kcal 100 Kcal 10 Kcal 0.1% 1% 10% 100% 1 Kcal 0.01% When an owl eats a flying squirrel it uses about 90% of the calories to live— move, digest, produce body heat, reproduce and escape from predators. When a frog eats a cricket or a cricket eats a plant, they use 90% of those calories to move, digest, produce body heat, reproduce and escape from predators.