Complete each of the following sentences using one of the terms listed below.
physical change
chemical change
reactant
product
coefficient
physical state
-In the image below hydrogen sulfide represents the________________. 
Definitions:
Mental Health Problems
Disorders or conditions affecting an individual's mood, thinking, behavior, and ability to relate to others.
Menopause
The period in a woman's life, typically between the ages of 45 and 55, when her menstrual cycles stop permanently, marking the end of fertility.
Osteoporosis
A condition characterized by weakened bones that are more susceptible to fracture, often due to aging or hormonal changes.
Estrogen Levels
The concentration of estrogen hormones in the body, which are crucial for the regulation of the reproductive system and secondary sexual characteristics in females.
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