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/im
ages/PBUT_LR.JPG
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Detritivores, Decomposers and Scavengers

• Are included in nearly every food web.
• Including the food web that includes human beings!