Warm up Oct. 30 How do animals get energy? What about plants? How do animals store energy? What about plants? How do you starve an animal? What about a plant? Explain your answer.

Chemical Energy & Trophs

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Cellular Energy Cells must convert food into a form of energy they can use. They cannot cash in carbohydrates for energy. Analogy: You cannot use money stored in the bank. You first need to turn it into cash.

Cellular Energy, continued Cells convert carbohydrates into ATP ATP(adenosine triphosphate): molecule used to carry chemical energy Carries energy in its bonds

ATP vs. ADP triphosphate adenosine diphosphate Make a double bubble in your notes comparing the structures of ATP and ADP 2 similarities and 1 difference Which carries more energy? Why? ATP ADP

How does ATP Release Energy? Energy is released when a phosphate group is removed. ADP (2p) is changed into ATP (3p) when a phosphate group is added.

How does ADP become ATP? Carbohydrates and other foods consumed by the body contain energy. When they are broken down, energy is released and is used to reattach the phosphate molecule to the ADP, turning it back into ATP.

How is ATP like a rechargeable battery?

How do Organisms get their Food? 1. Autotrophs: make their own food using inorganic compound Phototrophs: use the sunlight Chemotrophs: use chemicals 2. Heterotrophs: eat other organisms for food

Photosynthesis Plants also need ATP They do not directly use organic molecules (ex. Carbohydrates) They use energy produced from photosynthesis (make sugars from sunlight)

All cells break down macromolecules for energy Both Heterotrophs and Autotrophs contain energy in the form of organic molecules. To get energy all organisms must convert food into a form of energy they can use. Even plants need to eat. The only difference is that they make their own food.