What are the sources of carbon dioxide gas?
Carbon dioxide gas is very necessary for the photosynthesis process of green plants to make their own food, and to build their bodies, It is a chemical compound which its molecule consists of one...
Category: Earth and Universe
The properties, source and cycle of oxygen gas
The atmosphere contains oxygen gas that necessary for the respiration process, It is a mixture of gases surrounding the Earth, It is attracted to Earth by gravity, It protects the Earth by absorbing ultraviolet...
What are properties & types of soils?
Sand soil is well-aerated soil that has low absorption of water, clay soil is poorly aerated soil that has a high absorption of water, and silt soil is moderated aerated soil that has moderately...
Soil layers and living organisms, Top soil layers, Lower soil layers & Rocky layers
The soil is composed of three layers, They are the top soil layers, the lower soil layers, and the rocky layers, The soil horizon is the layer that is parallel to the soil crust,...
Formation and importance of the soil & How was the soil of Egypt formed?
The soil is the main component of the environment as it is necessary for all living organisms (plants, animals and human), the plants take minerals and other nutrients from the soil to live and...
What are the components of the soil?
The soil is a thin non-compacted superficial layer that covers the Earth’s crust, and it is a very important part of the environment, There are different types of soil that are different in color...
