The Greek Alphabet | 800 BC

How did Greeks come in contact with the Phoenicians? Phoenicians regularly traveled to Greece and established agreements with them.
How was the Greek adaptation of the alphabet different from its predecessor? Some of their consonants were adapted as vowels and additional letters were included.
Why is the Greek alphabet considered to be the world's first true alphabet? It has given rise to many other alphabets, including Latin alphabet.
Name several similarities and differences between the Greek and modern English alphabets? Letters were classified as consonants and vowels 
Post an example of the Greek alphabet in visual form.