If there were no atmosphere, the sky would be all black, except for the area directly around the sun, which you would not be able to look anywhere near because it would be so bright, as there would be no atmosphere to block its rays.
Contagion and contagiousness refers to how easily the spread of Genetic Disease is possible from one person to another. Other words for contagion include infection, infectiousness, transmission or transmissability. Contagiousness has nothing to do with genetics or inheriting diseases from parents.
What are the communicable diseases? a communicable disease is also known as an infectious disease, contagious disease, or a transmissible disease. a communicable disease is one which is clinically evident (shows â¦ characteristic signs and symptoms) and can result from infection/presence/growth of a pathogen. communicable disease is a disease that can be passed on in one way or another from a Carrier of the disease to some one else. and is usually th â¦ e result of a virus or bacterial infection. 17 people found this useful.