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

What to do? Write words in white Yellow words mean you need to do

something!

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

Make a double bubble in your notes comparing the structures of ATP and ADP2 similarities and 1

difference Which carries more

energy? Why?

triphosphateadenosine

adenosine diphosphate

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 compounda) Phototrophs: use the sunlightb) Chemotrophs: use chemicals

2. Heterotrophs: eat other organisms for food

Photosynthesis

Plants also need ATPThey 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.