The process of changing light energy to chemical energy is
known as...
Photosynthesis
O Cellular Respiration
O Preparation
Chemical Properties

Photosynthesis

Explanation:

Photosynthesis:

It is the process in which in the presence of sun light and chlorophyll by using carbon dioxide and water plants produce the oxygen and glucose.  The oxygen produced during photosynthesis is used in cellular respiration.

The sun light is converted into chemical energy in the form of sugar.

Word equation:

Carbon dioxide + water + energy →   glucose + oxygen

water is supplied through the roots, carbon dioxide collected through stomata and sun light is capture  by chloroplast.

Chemical equation:

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

it is known from balanced chemical equation that 6 moles of carbon dioxide react with the six moles of water and created one mole of glucose and six mole of oxygen.

if you're asking what comes out, it's steam.