Answer:
The process by which plants use energy from sunlight to convert water and carbon dioxide into glucose and oxygen is called photosynthesis. This process takes place in the chloroplasts of plant cells, which contain a green pigment called chlorophyll.
During photosynthesis, the chlorophyll absorbs light energy from the sun, which is used to split water molecules into oxygen and hydrogen ions. The oxygen is released into the atmosphere, while the hydrogen ions are used to produce ATP, a molecule that stores energy.
Next, the plant takes in carbon dioxide from the air and combines it with the hydrogen ions to produce glucose, a simple sugar that the plant uses as food. This process is known as the Calvin cycle.
Overall, photosynthesis is a vital process that allows plants to produce their own food and oxygen, and it is essential for supporting life on Earth.