Stars of Spectral Class O Have the Strongest Hydrogen Absorption

question 34

True/False

Stars of spectral class O have the strongest hydrogen absorption lines, whereas stars of spectral class M have the weakest hydrogen absorption lines.

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Definitions:

Cool-down Period

A period of time after physical exercise or a high-stress event where activities are performed at a reduced intensity to facilitate recovery.

Aerobic Exercise

Physical activity that involves the use of oxygen to adequately meet energy demands during exercise via aerobic metabolism.

Weight Training

A form of physical activity that involves lifting weights or using resistance to build muscle strength, endurance, and size.

Resistance Training

A form of physical activity designed to improve muscular strength and endurance by exercising against an opposing force.