An e-reader, also called an e-book reader or e-book device, is a mobile electronic device that is designed primarily for the purpose of reading e-books and digital periodicals. An e-reader is similar in form, but more limited in purpose than a tablet.-book reading is increasing in the US; by 2014 28% of adults had read an e-book, compared to 23% in 2013.
1 Ecology (pronunciation) â The study of the interaction of organisms with each other and with their environment.  Geobiology (pronunciation) â A science that combines geology and biology to study the interactions of organisms with their environment.
The two main branches of natural science are physical science and social science. Physics is the study of energy, chemistry is the study of matter, and biology is the study of life. 1. Behavioral and Social Sciences Animal Behavior Anthropology Archeology Economics Education Ethnology Linguistics Psychology Sociology.