energy = life life = energy what is the ultimate source of energy on earth? the sun
TRANSCRIPT
Energy = Life Life = Energy
What is the ultimate source of energy on
Earth?• The Sun
What is the difference between Autotrophs and
Heterotrophs?Autotrophs
• “self feeder”
• make food from inorganic molecules
• producers
Heterotrophs• “other eaters”
• get food by eating other organisms
• consumers
How do they obtain their energy?
AutotrophsAutotrophs• Photosynthesis- uses Sun’s energy
to convert water and carbon dioxide into glucose.
Autotrophs and HeterotrophsAutotrophs and Heterotrophs• Cellular Respiration- use oxygen to
convert glucose into ATP.
How does photosynthesis and respiration relate to one
another?
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
How is chemical energy a type of potential energy?
• A molecule can store energy between atoms.
• When atoms are released, energy is released.
Organic molecules have structures that give them lots of chemical energy in the form of ATP.
How do we obtain energy from food?
An analogy of respiration
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 TriphosphateI use ATP to move
my muscles!
What is the structure of ATP?
• 1 Adenosine molecule
• 1 Ribose molecule = 1 ATP
• 3 Phosphate molecules
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.
What is the ATP Cycle?
ATP ADP ATP ADP ATP ADP