The emt is appropriately sizing the airway when she measures:

The emt is appropriately sizing the airway when she measures the distance from the nose to the earlobe.
These emergency medical technicians are obviously trained when it comes to these medical issues, and know how to properly size the airway. In this case, when it comes to the nose airway, this distance between the nose and the earlobe is the way to go.

1) clean up you lab area2) dispose of the chemicals as instructed by your teacher3) put everything back where it belongs unless your teacher tells you otherwise4) dispose of gloves5) wash hands with soap and water