Tier 3 words can be characterized as:

Tier 3 words can be characterized as:

• A. Common words used across everyday speech
• B. Words restricted to a narrow domain and not typically found in casual language
• C. Most frequent words in written English
• D. Slang terms used in conversation

Answer: (B)

Tier 3 words are domain-specific terms used in particular content areas, such as science, geography, or history. They are restricted to a narrow area and aren’t typically heard in everyday casual conversation, which is why they don’t pop up in general speech or writing unless you’re studying a specific topic. Because they’re tied to a subject, students often need explicit teaching and exposure to learn them, along with understanding how they apply within that domain. That’s why the correct idea describes them as domain-restricted and not common in casual language. By contrast, common words used in everyday speech are Tier 1, and the most frequent words in written English that cross many contexts are Tier 2. Slang terms are informal and social, not inherently tied to a specific academic topic, so they don’t capture the concept of domain-specific vocabulary.

Tier 3 words are domain-specific terms used in particular content areas, such as science, geography, or history. They are restricted to a narrow area and aren’t typically heard in everyday casual conversation, which is why they don’t pop up in general speech or writing unless you’re studying a specific topic. Because they’re tied to a subject, students often need explicit teaching and exposure to learn them, along with understanding how they apply within that domain.

That’s why the correct idea describes them as domain-restricted and not common in casual language. By contrast, common words used in everyday speech are Tier 1, and the most frequent words in written English that cross many contexts are Tier 2. Slang terms are informal and social, not inherently tied to a specific academic topic, so they don’t capture the concept of domain-specific vocabulary.