With this article we begin a series of academic texts aimed at the youngest. In this post, as the article says, we offer an explanation of the photosynthesis for children. Thus, the text can be used by parents and teachers who want to use it to explain this concept to the little ones.
What is photosynthesis
All living beings on the planet have to feed, and plants, trees, algae and bacteria are also living beings.
However, the way in which plants and some marine bacteria feed themselves is something different from the rest of the animals: while mammals, fish, birds and other living beings get their food from the environment that surrounds them and directly perform their digestion , plants produce their own food from photosynthesis which they then digest.
This does not mean that, especially plants, algae, etc., do not need external nutrients. In fact, its roots absorb water, minerals and other nutrients from the earth to precisely perform photosynthesis correctly.
What is important to remember is that the food that allows the plant to grow is produced through photosynthesis.
How photosynthesis occurs
For photosynthesis to occur, plants need:
- Carbon dioxide (CO2) from the atmosphere. This gas is produced by the animals when they breathe: we breathe in oxygen and we expire Carbon Dioxide. It is also produced by vehicles and other types of transportation, heating or plastic when it dissolves over the years.
- Energy from sunlight.
- Water and nutrients that they get through their roots.
With these elements, plants can already perform photosynthesis. This occurs in four main stages:
The plants also have cells. These are called chloroplasts and they are found mostly in the leaves of trees and plants. Chloroplasts, in turn, have molecules inside. Among the most important chlorophyll molecule, which is the one that absorbs from the leaves the energy of sunlight.
In addition, the plants have roots to absorb water and nutrients.
Finally, also from the leaves, the plants absorb CO2 from the atmosphere to start photosynthesis.
With CO2 and the energy of sunlight absorbed by the leaves, it is not yet possible to carry out photosynthesis. Nutrients are needed These move from the roots to the circulatory system of the plant or the tree in the form of brute sap. That is, sap that still does not feed the plant.
When the crude sap reaches the leaves, then the chloroplasts begin to transform light energy, water, nutrients and CO2 into chemical energy how is glucose and other complex molecules. All of them form the elaborated SAP, which is already the food of plants and algae.
Breathing and waste disposal
The plant takes full advantage of the elaborate sap and only produces a waste in photosynthesis: oxygen, which is expelled throughout the day.
Benefits of photosynthesis for the earth
<img class = "aligncenter size-medium jetpack-lazy-image” alt=”Carbon cycle” width=”472″ height=”394″ data-recalc-dims=”1″ src=”https://i1.wp.com/www.homohominisacrares.net/sec/ecologia/co2/co2_clip_image001.gif?resize=472%2C394&is-pending-load=1#038;ssl=1″ srcset=”data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7″/>
We have already said that photosynthesis is produced by plants, trees, some marine bacteria and, very importantly, by the seaweed, which are also plants.
For this reason, most of the oxygen we breathe comes from the oceans. These occupy 75% of the planet and have billions of algae and phytoplankton, which is also a vegetable and that performs photosynthesis to feed itself.
To finish, remember that for life on the planet to continue and for people to live, plants are very necessary. That is why it is so important to take care of the environment.