1. Noun or adjective?

2. THE NOUN
A NOUN is a word or group of
words that represent a person, a
place, a thing or activity, or a
quality or idea.
Examples:
• The particles in an ice cube can
have kinetic energy.
• I work with a chemist and a
physicist.

3. THE ADJECTIVE
An ADJECTIVE is a word that
describes a noun or pronoun.
Examples:
• The cubic crystal system is the most
symmetric of the 7 crystal systems.
• They need to make a chemical analysis of
the soil.
• There is no physical explanation for this
phenomenon.