Una Solución de sal al 16 % (en masa)

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

What field of science did harry hess study?

Some tools have graduations to show multiple measurements. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement? millimeters centimeters decimeters meters