Definition Of Atmospheric Pressure The air has weight and occupies space. It exerts its weight as pressure on the surface of the earth which is
Definition of Atmosphere The earth is surrounded by a huge blanket of air called Atmosphere. It is held to our planet by its gravitational attraction.
Environment The environment is our basic life support system to provide: the water, we drink. the air, we breathe. the food, we eat. the land,
A black hole is an astronomic object and its gravitational field is so powerful that anything does not escape its pull, they are invisible because