Learn on PengiVocabulary from Classical Roots (Book 4)Chapter 4: Lesson 13-15

Lesson 14: Likely to Be Well Organized

In this Grade 3 vocabulary lesson from Vocabulary from Classical Roots Book 4, students explore words built from the roots organ (tool, instrument) and prob (to test or prove), learning terms such as organism, disorganized, organization, probability, probable, and probe. Exercises guide students to use root clues, identify synonyms, and apply words in context. The lesson also introduces the noun suffix -ist, helping students understand how words like organist, artist, and novelist are formed.

Section 1

The Root 'organ': Tool or Instrument

Let's explore words that share the root 'organ', which means a tool or instrument. These words all relate to structure, parts working together, or a musical instrument itself.

Key Words

WordDefinition
disorganized (adj.)Without structure, untidy
organ (n.)1. A part of a plant or animal that performs a special job. 2. A musical instrument with a keyboard and many pipes through which air moves to make different tones
organism (n.)Any plant or animal with parts that work together in a structured way to support life
organist (n.)A person who plays the organ
organization (n.)1. Structure; the way the parts fit into a whole. 2. A group of people who work together for a particular purpose, a club

📝Example Usage:

  • Because his backpack was so disorganized, it took Leo ten minutes just to find his math homework.
  • The skin is actually the largest organ in the human body and protects us from germs.
  • Even a tiny pond is home to millions of microscopic organisms that you can only see with a microscope.
  • The organist practiced for hours to master the complicated foot pedals of the church pipe organ.
  • Our local animal rescue organization works hard to find permanent homes for stray dogs and cats.

Section 2

The Root 'prob': To Test or Prove

Now for words from the root 'prob', meaning to test or prove. These words are all about investigating, likelihood, and certainty.

Key Words

WordDefinition
probability (n.)Likelihood; good chance of proving true
probable (adj.)Not certain but reasonably sure; likely
probe (v.)To examine, look into, inquire about

📝Example Usage:

  • The high probability of rain made it probable that the game would be canceled.
  • The reporter decided to probe the rumors to see if they were true.

🧠Memory Trick:

  • It is probable the detective will probe the mystery, increasing the probability of solving the case.

Book overview

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Chapter 4: Lesson 13-15

  1. Lesson 1

    Lesson 13: Grateful for Classes

  2. Lesson 2Current

    Lesson 14: Likely to Be Well Organized

  3. Lesson 3

    Lesson 15: Locating Technical Skills

Lesson overview

Expand to review the lesson summary and core properties.

Expand

Section 1

The Root 'organ': Tool or Instrument

Let's explore words that share the root 'organ', which means a tool or instrument. These words all relate to structure, parts working together, or a musical instrument itself.

Key Words

WordDefinition
disorganized (adj.)Without structure, untidy
organ (n.)1. A part of a plant or animal that performs a special job. 2. A musical instrument with a keyboard and many pipes through which air moves to make different tones
organism (n.)Any plant or animal with parts that work together in a structured way to support life
organist (n.)A person who plays the organ
organization (n.)1. Structure; the way the parts fit into a whole. 2. A group of people who work together for a particular purpose, a club

📝Example Usage:

  • Because his backpack was so disorganized, it took Leo ten minutes just to find his math homework.
  • The skin is actually the largest organ in the human body and protects us from germs.
  • Even a tiny pond is home to millions of microscopic organisms that you can only see with a microscope.
  • The organist practiced for hours to master the complicated foot pedals of the church pipe organ.
  • Our local animal rescue organization works hard to find permanent homes for stray dogs and cats.

Section 2

The Root 'prob': To Test or Prove

Now for words from the root 'prob', meaning to test or prove. These words are all about investigating, likelihood, and certainty.

Key Words

WordDefinition
probability (n.)Likelihood; good chance of proving true
probable (adj.)Not certain but reasonably sure; likely
probe (v.)To examine, look into, inquire about

📝Example Usage:

  • The high probability of rain made it probable that the game would be canceled.
  • The reporter decided to probe the rumors to see if they were true.

🧠Memory Trick:

  • It is probable the detective will probe the mystery, increasing the probability of solving the case.

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 4: Lesson 13-15

  1. Lesson 1

    Lesson 13: Grateful for Classes

  2. Lesson 2Current

    Lesson 14: Likely to Be Well Organized

  3. Lesson 3

    Lesson 15: Locating Technical Skills