During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.

During this process, the plant combines carbon dioxide with water to allow the plant to extract what it needs for food. Photosynthesis separates carbon dioxide and water — known as CO2 and H2O, respectively — into their individual molecules and combines them into new products.

In the first reaction, energy is used to split water molecules into hydrogen and oxygen. The hydrogen is needed for the second stage of reactions and the oxygen is released by the plant as a waste product. In the reactions of the second stage, the hydrogen is combined with carbon dioxide to make glucose.

The raw materials for photosynthesis are as follows: Carbon dioxide – through gaseous exchange carried out by stomata. Water – roots absorb water from the soil provided by irrigation or even rains. Sunlight – chlorophyll, the green pigment present in green plants traps solar energy.

stomata

Carbon dioxide is produced whenever an acid reacts with a carbonate. This makes carbon dioxide easy to make in the laboratory. Calcium carbonate and hydrochloric acid are usually used because they are cheap and easy to obtain. Carbon dioxide can be collected over water, as shown in the diagram.

Plants use carbon dioxide (CO₂) during photosynthesis to make glucose. Eventually every plant returns all the carbon dioxide it uses back to the atmosphere. Read more: Could captured carbon dioxide be stored in the deep ocean?

ocean

During daylight hours, plants take in carbon dioxide and release oxygen through photosynthesis, and at night only about half that carbon is then released through respiration. At night, plants release carbon dioxide and absorb oxygen ceasing photosynthesis.

Photosynthesis is the process of formation of food by absorbing CO2 and releasing 02 as byproducts in plants. But during night time, plants perform only respiration and no photosynthesis (since absence of sunlight). Thus concentration of CO2 released is higher during night time.

One of the first things taught in biology class is that animals breathe in oxygen and exhale CO2, while plants take in CO2 during the day and release oxygen. In a process called “photosynthesis,” plants use the energy in sunlight to convert CO2 and water to sugar and oxygen.

The green leaves of plants carry out both photosynthesis (in light) and respiration (all the time). Photosynthesis uses carbon dioxide to make sugar and produces oxygen as a byproduct. Respiration uses oxygen to release energy from stored sugar and produces carbon dioxide as a byproduct.

During daylight hours, plants take in carbon dioxide and release oxygen through photosynthesis, and at night only about half that carbon is then released through respiration. However, plants still remain a net carbon sink, meaning they absorb more than they emit.

Answer 1: During their lifetimes, plants generally give off about half of the carbon dioxide (CO2), that they absorb, although this varies a great deal between different kinds of plants. Once they die, almost all of the carbon that they stored up in their bodies is released again into the atmosphere.

One plant can absorb just 0.0000019 kg of CO2 in 24 hours – 0.10%.