1. Energy = Life Life = Energy

2. What is the ultimate source of energy on Earth?
The Sun

3. 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

4. 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.

5. How does photosynthesis and respiration relate to one another?

6. 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

7. How is chemical energy a type of potential energy?
A molecule can store energy between atoms.
When atoms are released, energy is released.

8. How do we obtain energy from food?
Organic molecules have structures that give them lots of chemical energy in the form of ATP.

9. An analogy of respiration

10. 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!

11. What is the structure of ATP?
1 Adenosine molecule
1 Ribose molecule = 1 ATP
3 Phosphate molecules

12. 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.

13. ATP  ADP  ATP ADP ATP ADP
What is the ATP Cycle?
ATP  ADP  ATP ADP ATP ADP