1.  These diatoms are single celled algae that use the process of photosynthesis to store chemical energy in sugars. Animals eat photosynthetic organisms such as plants and algae to get this chemical energy. They also produce oxygen that is required to release much of the chemical energy in sugars.

2.  Energy  Sugar  Oxygen

3.  Photosynthesis

4.  Organisms can’t live off of carbon dioxide because they would die. Therefore, photosynthetic plants / organisms turn the CO2 into organic compounds like carbohydrates. The plants process the CO2 and give us glucose!!!!!

5.  Proteins  Carbohydrates  Lipids  Nucleic Acids

6.  Breaks them down for materials and energy needed to maintain life.