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 Roman numeral XI stand for the number 11. X is the Roman numeral for 10, and I represents one. In the Roman numeral system, numbers are written as letters arranged in special... The Roman numeral XI stand for the number 11. X is the Roman numeral for 10, and I represents one. In the Roman numeral system, numbers are written as letters arranged in special ways. Continue Reading