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 Importance of the Sun: Solar Energy Introduction and Overview INTRODUCTION In this lesson, students will investigate the development and use of solar power. They will examine the role of the sun as a source of energy and explore how humanity has relied on the sun to provide energy for our lives.oday, we know the sun as our closest star in the universe. This ball of gas has a large build-up of heat and pressure in its core that causes it to emit heat and radiant energy. Solar energy supports all life on earth and is the basis for almost every form of energy we use.