First, illu, what is important to know is that a semitone is a semitone-whether diatonic or chromatic, a semitone is always two notes which are one half step apart (like you said, neighbor keys on the piano). or b signs by themselves do not indicate that the note is chromatic. In my opinion there are two main approaches (based on my experience) to understanding what the 'term' diatonic means: 1. Related to the scale construction suggesting that it is built using both whole tones and semitones. Hence the prefix 'dia'.
The invention of such portable sundials shows how important it was for the ancient Egyptians to keep time. At the same time, sundials were only effective given enough sunlight. To tell time at night the Egyptians invented the water clock. The first water clocks appeared during the reign of Amenhotep I. It was a stone bowl filled with water at precise time of the day. It had slanting sides and a small hole at the bottom trough which water dripped at a constant rate.
Mountains are important to us because they're a huge factor in our ecosystem They provide diverse fauna and flora, recreational activities amazing features etc.It also helps people who live on lowland as it blocks wild weather. Mountains also contain minerals, water, wood and timber, everything you can name is there!he Andes mountains extend over seven countries Andes  Mountains, is one of the most important archaeological  centers in South America. The small tree Cinchona  pubescence â¦ , a source of quinine which is used to treat malaria,  is found widely in the Andes as far south as Bolivia.