The global warming phenomenon Global warming is caused by the greenhouse effect, It is the continuous increase in the average temperature of the Earth’s near-surface air, The increase of the concentration of carbon dioxide...
The molecules The matter consists of very small structural units known as the molecules, The molecule is the smallest part of the matter which can exist freely, and it has the properties of the...
The types of the soil are the sand soil, the silt soil and the clay soil What are the types of soil? You can see the soil around you, you will notice the different...
There are food relations between all the living organisms, The living organisms are classified according to their feeding into the producers which depend on themselves to make their food such as the green plants...
