Reflection 6.- Long and Short vowel sounds

                   In English there are long and short vowel sounds but in Spanish there is only short vowel sound, they are not represented with dots. Also, in Spanish the vowel sound allow the air escapes through the mouth with touching the tongue any point of articulation as hard palatal, soft palatal, alveolar, velum. In Spanish you never feel confuse doing sounds with vowels as in English you do. For example you probably get confuse pronounced the word hour in English, but if you say hora you notice that is easier identify one wovel as it is orthography write.

Souces: http://esl.fis.edu/grammar/langdiff/spanish.htm

http://spanish.about.com/od/spanishpronunciation/a/pronouncing_vowels.htm

If you are interested about it topic you should visit those web pages to develop a clearly idea of that.