Photosynthesis is the process by which plants and other organisms use sunlight to convert carbon dioxide and water into glucose and oxygen. The overall reaction for photosynthesis can be represented as follows:

6CO2 + 6H2O + light energy → C6H12O6 + 6O2

The reactants for photosynthesis are carbon dioxide (CO2), water (H2O), and light energy. The products of photosynthesis are glucose (C6H12O6) and oxygen (O2).

Respiration is the process by which organisms use oxygen to break down glucose and other organic molecules to produce energy. The overall reaction for respiration can be represented as follows:

C6H12O6 + 6O2 → 6CO2 + 6H2O + energy

The reactants for respiration are glucose (C6H12O6) and oxygen (O2). The products of respiration are carbon dioxide (CO2), water (H2O), and energy.

Photosynthesis and respiration are two essential processes that are linked together in the carbon cycle. Photosynthesis removes carbon dioxide from the atmosphere and converts it into glucose, which is then used by organisms for energy through respiration. Respiration releases carbon dioxide back into the atmosphere, completing the cycle.