Transfer of Energy

1. Transfer of Energy

2. Calories • What is a calorie? The amount of heat required to raise the temperature of 1 gram of water by 1 degree Celsius • Another similar measurement is a joule (J) 1 calorie = 4.18J 1000J = 1kJ

3. Energy Use • An organism uses different amounts of energy for different actions • Different organisms use different amounts of energy

4. Transfer of Energy • Where do animals get their energy? • What is the original source of all energy on Earth?

5. Transfer of Energy • Transfer of energy from one trophic level to the next is not efficient • Textbook, page 8, last paragraph Fig. 1.5B

6. Where Does it Go?? Fig. 1.5A

7. Worksheet

8. What About Organisms That do NOT get Eaten?? • What happens to the energy left in their bodies when they die?

9. Detritivores and Decomposers • The bodies of smaller dead animals, dead plant matter and animal dung ( solid waste) are food for Detritivores.

10. Decomposers • Detritivores include decomposers such as bacteria and fungi that break down the cells and extract the last remaining energy http://soils.usda.gov/sqi/concepts/soil_biology/images/PBUT_LR.JPG

11. Detritivores, Decomposers and Scavengers • Are included in nearly every food web. • Including the food web that includes human beings!