A certain event is one that must happen whenever the stated conditions remain the same; every possible outcome supports the event. Learners interpret and describe familiar situations using “certain” rather than confusing certainty with events that are merely likely or expected, without assigning numerical probabilities or analyzing compound and equally likely outcomes. This understanding provides a foundation for comparing likelihood and describing impossible, possible, and more or less likely events.
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Detailed Explanation: Describe events as certain
A certain event is something that must happen when the conditions stay the same. There is no other result that can happen.
To decide if an event is certain:
- Look at what is happening.
- Think about all the results that could happen.
- If every result makes the event happen, the event is certain.
Example
A box has only blue crayons. You choose one crayon without looking.
Is “choosing a blue crayon” certain?
- The box has blue crayons only.
- The crayon you choose must be one of the crayons in the box.
- Every crayon in the box is blue.
So, choosing a blue crayon is certain.
You can say: “It is certain that I will choose a blue crayon.”
Learn by doing: Describe events as certain
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Likelihood - Spinner - How Likely Is This Event
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Download/Modify Free Grade 1 'Describe events as certain' Worksheet
Print this free 'Describe events as certain' worksheet to practice this skill away from the computer. Click 'Modify' to easily customize this worksheet to your exact needs.
This Worksheet Includes:
- Likelihood - Spinner - How Likely Is This Event
- Likelihood - One Die - How Likely Is This Event
- Likelihood - Spinner - Is This Likelihood Correct
- Likelihood - One Die - Is This Likelihood Correct
Units Teaching This Skill
These adaptive units introduce, teach, or reinforce this skill (Describe events as certain) through scaffolded problems that grow in difficulty as concepts are understood.