Tier 3 words are best described as:

Tier 3 words are best described as:

• A. General academic words frequently used
• B. Domain-specific words not necessarily familiar to mature language users
• C. Everyday conversational words
• D. Slang terms

Answer: (B)

Tier 3 words are domain-specific terms tied to a particular subject area. They aren’t part of everyday language and tend to be low in frequency, so you’ll encounter them mainly when you’re studying a specific field. These words carry precise meanings that help describe concepts within that discipline—think of terms like photosynthesis, isotope, or glacier. Because they depend on context from a subject, learners often need targeted instruction and repeated exposure to learn them. This sets them apart from everyday vocabulary (Tier 1) and the more widely used academic words across many subjects (Tier 2). Slang isn’t the focus here, since Tier 3 terms are the technical vocabulary used in formal content areas.

Tier 3 words are domain-specific terms tied to a particular subject area. They aren’t part of everyday language and tend to be low in frequency, so you’ll encounter them mainly when you’re studying a specific field. These words carry precise meanings that help describe concepts within that discipline—think of terms like photosynthesis, isotope, or glacier. Because they depend on context from a subject, learners often need targeted instruction and repeated exposure to learn them. This sets them apart from everyday vocabulary (Tier 1) and the more widely used academic words across many subjects (Tier 2). Slang isn’t the focus here, since Tier 3 terms are the technical vocabulary used in formal content areas.