What is/are the adjective(s) in the following sentence?: The old professor kept records of all of his crazy science experiments.
The adjectives in the sentence are old and crazy.
The pronoun his is a possessive adjective, a word that takes the place of a possessive noun.
The adjective "old" describes the noun "professor" .
The adjective "crazy" describes the compound noun "science experiments"
Note: The noun "science" is functioning as an attributive noun, also called a noun adjunct, which is a noun functioning as an adjective to describe another noun.