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.
Xiami is a smartphone manufacturer thatâs frequently described as âChinaâs Appleâ. It was founded by Lei Jun just four years ago, and has exploded in size, tripling shipments between 2013 and 2014. The company sells the vast majority (95%) of its phones in China, but itâs starting to expand internationally. It launched in Singapore in February, and then in April it launched an English-language website, Mi.com. Xiaomi creates a wide array of budget Android smartphones, but its flagship device is the âMiâ range.