Final answer:
The activity where students place chips on a matrix for each sound heard in the word 'sled' demonstrates phonemic awareness. It involves identifying and manipulating the individual sounds in the word.
Step-by-step explanation:
Mrs. Rosalas is having her students place a chip on a matrix for each sound they hear in the word "sled". This activity demonstrates phonemic awareness, which is the ability to identify and manipulate individual sounds (phonemes) in spoken words. The word "sled" contains four distinct sounds: /s/, /l/, /e/, and /d/. Recognizing and mapping these sounds is a foundational skill in reading and spelling. In this activity, the students are likely using a four-quadrant matrix to represent each of the four sounds they hear.