* Glucose (C6H12O6): A simple sugar that serves as the primary energy source for plants and other organisms.

* Oxygen (O2): A byproduct of photosynthesis, released into the atmosphere.

Essentially, during photosynthesis, plants use sunlight, water, and carbon dioxide to create glucose (a type of sugar) and oxygen. This process is how plants obtain energy and how they release oxygen, which is essential for most life on Earth.