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.
The Sun (in Greek: Helios, in Latin: Sol) is the star at the center of the Solar System and is by far the most important source of energy for life on Earth. It is a nearly perfect spherical ball of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process.he solar constant is the amount of power that the Sun deposits per unit area that is directly exposed to sunlight. The solar constant is equal to approximately 7003136800000000000â 1,368 W/m2 (watts per square meter) at a distance of one astronomical unit (AU) from the Sun (that is, on or near Earth).