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Energy = Life Life = Energy
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What is the ultimate source of energy on Earth?
The Sun
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What is the difference between Autotrophs and Heterotrophs?
“self feeder” make food from inorganic molecules producers Heterotrophs “other eaters” get food by eating other organisms consumers
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How do they obtain their energy?
Autotrophs Photosynthesis- uses Sun’s energy to convert water and carbon dioxide into glucose. Autotrophs and Heterotrophs Cellular Respiration- use oxygen to convert glucose into ATP.
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How does photosynthesis and respiration relate to one another?
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What is energy? the ability to perform work
Potential energy: energy that is stored; It may be converted to other types of energy. Kinetic Energy: energy of motion. Thermal Energy
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How is chemical energy a type of potential energy?
A molecule can store energy between atoms. When atoms are released, energy is released.
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How do we obtain energy from food?
Organic molecules have structures that give them lots of chemical energy in the form of ATP.
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An analogy of respiration
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How do cells convert chemical energy into usable energy?
Chemical energy stored in organic molecules is converted to energy stored in a molecule called “ATP” ATP = Adenosine Triphosphate I use ATP to move my muscles!
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What is the structure of ATP?
1 Adenosine molecule 1 Ribose molecule = 1 ATP 3 Phosphate molecules
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How does ATP drive cellular work?
When a phosphate bond of an ATP molecule is broken, energy is released. The phosphate attaches to another molecule.
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ATP ADP ATP ADP ATP ADP
What is the ATP Cycle? ATP ADP ATP ADP ATP ADP
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