Properties of carbon dioxide – circulation in nature
how can you prove that air exists;
what is the air and what is its composition;
which criteria are adopted for the classification of types of chemical reactions;
how equations of chemical reactions are recorded;
what are oxides and how these can be obtained by combustion;
which homemade method is used to obtain carbon dioxide.
to name the sources of carbon dioxide;
to discuss the circulation of carbon dioxide in nature;
One of the most mysterious disasters in history
On August 22, 1986, in the morning, in Cameroon, the area surrounding Nyos Lake, situated on the slope of an inactive volcano (900 m above sea level), seemed completely extinct. Of the seven hundred residents of one of the villages who had been doing their daily activities a day earlier, only six survived. A terrifying sight appeared to their eyes. In the area of 30 km from the lake, 1,466 people and many thousands of animals lost their lives. The ridiculous was the lack of any external injuries. People who came to the lake were surprised by the reduction of the sheet of water by about a meter, the change of the colour of water from blue to red and trees lying at the edge as after the tsunami. Those who survived had health problems, they said that the spirit of the lake was to blame for everything. And what happened?
It is assumed that huge amounts of gas accumulated under the lake bottom have escaped above its surface. Carbon dioxide’sCarbon dioxide’s density is about 1.5 times higher than the density of the air. Filling the valley, it displaced the air out of it, containing the necessary oxygen for life. Although COIndeks dolny 22 is not a toxic gas, it can cause death by asphyxiation. When its content in the air exceeds 10%, hallucinations and coma may appear, and when it is 20% death occurs within a dozen or so minutes.
Circulation of carbon dioxide in nature
Carbon dioxide is an important component of atmospheric air (0.03% of volume). It is an indispensable substrate in the process of photosynthesisphotosynthesis.
Create a drawing in the form of a diagram showing the circulation of carbon dioxide in nature.
Add the terms: the substrate and product in the appropriate places in the table.
| Organisms | Oxygen | Carbon dioxide |
|---|---|---|
| Animals | ||
| Green plants |
Group examples of sources of carbon dioxide by natural and anthropogenic origin.
mines, respiration, farm animals, planes, fermenting fruits, factories, car, volcanic eruptions, forest fires
| Natural | |
|---|---|
| Anthropogenic |
Summary
Carbon dioxide is a component of the air. Its content in the air is variable.
It is created in the processes of breathing, fermentation and combustion. Under the influence of sunlight, in the presence of chlorophyll found in cells, carbon dioxide with the help of water transforms into oxygen and glucose. This process is called photosynthesis.
Keywords
Carbon dioxide, photosynthesis
Glossary
dwutlenek węgla – to zwyczajowa nazwa tlenku węgla(IV). Jest on składnikiem powietrza.
fotosynteza – to proces podczas którego pod wpływem światła słonecznego, w obecności chlorofilu znajdującego się w komórkach, tlenek węgla(IV) z udziałem wody przekształca się w tlen oraz glukozę.