A small sapling grows into a towering tree, is the quality conserved?

Conservation of mass is a system problem, and you just look at the tree as a whole. For trees, if you want to talk about the system of conservation of mass, this system is too big, the land and air should be counted, the minerals and nutrients in the land will be absorbed by the trees, and the decay of the leaves of the trees will return to become the nutrients and minerals in the soil; The moisture in the soil is absorbed by the trees and evaporates from the leaves into the air; The oxygen in the air is used by the leaves of the trees for photosynthesis, and the carbon dioxide produced by photosynthesis is returned to the air. The whole system is constantly circulating to achieve conservation of quality.

It depends on what you choose as the system for calculating the conservation of mass: if you just look at the small tree, its mass does increase "weirdly", but if you consider the natural environment in which it grows, you can easily get the result of "conservation of mass"! The quality of the growth of small seedlings is the nutrients absorbed in the soil, carbon dioxide in the air and other substances, and the increase in its mass is as much as the decrease in the quality of the environment outside it.

First of all, figure out the applicable conditions for the conservation of mass:

1.in chemical reactions (chemical changes).

2.Substances involved in the reaction.

3.There is no change in mass before and after the reaction.

Any law has its applicable conditions, and the process of growing a small sapling into a large tree is not a general chemical change, and it is not suitable for the law of conservation of mass.

Conservation, it absorbs energy from the outside world.

In a chemical reaction, the sum of the masses of the substances before participating in the reaction is equal to the sum of the masses of the substances produced after the reaction. This law is called the law of conservation of mass. It is one of the fundamental laws that are prevalent in nature.

In any system that is isolated from its surroundings, the total mass remains the same, regardless of the changes or processes that occur. In other words, any change, including chemical reactions and nuclear reactions, cannot eliminate matter, but only change the original form or structure of matter, so this law is also called the law of immortality of matter.

Both! When it happens, it's a chemical change, and when it turns CO2 into O2, there's evaporation of water in its body, which is a physical change.

There are both physical and chemical changes, the absorption of water by roots is a physical change, and the change of inorganic matter to organic matter is a chemical change.

There are both physical and chemical changes.

There are also quantitative changes in qualitative changes.

This can only be regarded as a biological process, not a change, or do you think about what changes you have when you grow up?

The sapling grows into a towering tree, first of all, the sapling has good genes.

It is important to illustrate the innate strengths.

It's a chemical change. Physical change is a change that does not produce other substances, while a small sapling grows from small to large, and it produces new substances such as fallen leaves, new roots, and new branches (if you study biology, you will know that new cells, new proteins, etc.) are produced, and since new substances are produced, it is of course a chemical change. Copy the search.

Chemical changes. The most important chemical change is photosynthesis, which accumulates organic matter and grows small trees.

There are both chemical and physical changes, such as the transport of water "nutrients", the osmosis between cell walls, and so on, which are physical changes.

Metabolic processes such as absorbing carbon dioxide during the day but releasing oxygen, the withering of old cells, and the formation of new cells are complex chemical changes.

Process...

At least, the melon is ripe, and the ancient is through the present.

1, at least. 2. The melon is ripe. 3 questions I won't.