From the sun or other source of light. That is why it is called photosynthesis. Photo means light.
Sugars are created during the light independent reactions of photosynthesis. Sugar is the byproduct of the photosynthesis and is a chemical reaction within a plant's cell.
During photosynthesis plants transform light energy from the sun to chemical energy.
nuclear reactions in the Sun
anatomy
ATP and NADPH
ATP and NADPH
A single chemical that breaks down into other substances during chemical reactions is "decomposing".
oxygen
During chemical reactions bonds are broken.
it is broken down to fuel chemical reactions & is created by chemical reactions.
Weathering can be mechanical or chemical.
The energy formed in the light reactions of photosynthesis is used to convert carbon dioxide into glucose during the Calvin cycle (dark reactions).