By the Age of Eight to 12 Months, Infants Smile

question 927

Short Answer

By the age of eight to 12 months, infants smile more frequently when another person is nearby, which is called a(n)__________ smile.

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Definitions:

Acidic

Characterized by a low pH, indicating a higher concentration of hydrogen ions, often associated with substances like lemon juice or vinegar.

Basic

Characteristic of substances with a pH greater than 7, often capable of neutralizing acids to form water and salts.

ATP

Adenosine triphosphate, a molecule that stores and transfers energy within cells, enabling various cellular functions.

Oxygen

A chemical element with symbol O, essential for cellular respiration in aerobic organisms and required for most combustion.