At the core of biology and other sciences lies a problem-solving approach called the scientific method. 1  Make an observation. 2  Ask a question. 3  Form a hypothesis, or testable explanation. 4  Make a prediction based on the hypothesis.  Test the prediction.
Xi. Xi is the 14th letter of the Greek alphabet. It is pronounced in Modern Greek, and generally or in English. In the system of Greek numerals, it has a value of 60. Xi was derived from the Phoenician letter samekh. Xi is not to be confused with the letter chi, which gave its form to the Latin letter X.
The characters of the ideograms are indeed similar, and the first, xi, meaning rare, special is in use today with that meaning when used in combination with other words (xi han = rare); while the second, la, again in syllable combination, today means fat (la zhu = candle made from fat).f course there are exceptions, for example it is always gou mai I buy (not mai gou) but in the instance of the words AthinaYadian, both syllable-words mean attractive, wonderful, charming, and can be reversed: Dian ya) .