What the difference between skimming and scanning?

skimming: A reading technique which allows a reader to quickly identify main ideas and key points by only reading first and last sentences in paragraphs and looking for key terms.

scanning:Skimming and scanning are reading techniques that use rapid eye movement and keywords to move quickly through text for slightly different purposes. Skimming is reading rapidly in order to get a general overview of the material. Scanning is reading rapidly in order to find specific facts.

Explanation:

1). la music clasica y la musica pop es bien interesante

2). el ajedrez y los videojuegos son divertidos