Reading comprehension worksheet on sequencing lightning and thunder events, designed for K-5 students.

The image you've uploaded is a reading comprehension worksheet from K5 Learning, titled "Sequencing", which focuses on understanding the sequence of events in a passage about lightning and thunder.

Let’s solve the task step by step, based on the content of the passage.

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🔍 Task:

Read the passage about lightning and thunder and identify the sequence of events that lead to lightning and thunder. Then, explain the solution.

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✔ Step 1: Understand What Sequencing Means

Sequencing means putting events in the correct order — from first to last. In this case, we need to identify the order of events that cause lightning and thunder.

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🌩️ Passage Summary:

Here’s what happens in the passage:

1. Warm air rises and cold air sinks.
2. This causes friction when they move over each other.
3. Friction builds up electrical charge in clouds.
4. The charge becomes stronger until it explodes — this is lightning.
5. Lightning heats the air around it to an extremely high temperature (hotter than the sun).
6. This sudden heating causes the air to expand rapidly, creating a sound wave — that's thunder.

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⏳ Sequence of Events (From First to Last):

Now, let's list the events in the correct order based on the passage:

1. Warm air rises and cold air sinks.
2. Friction occurs between the moving air masses.
3. This creates electrical charges in the clouds.
4. Charges build up until they become strong enough to explode — this is lightning.
5. The lightning heats the air around it very quickly.
6. The heated air expands rapidly, creating a sound wave — thunder.

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💡 Why Do We See Lightning Before Hearing Thunder?

- Light travels much faster than sound.
- So, we see the lightning almost instantly.
- But sound (thunder) takes time to travel through the air.
- That’s why we hear thunder a few seconds later.

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✔ Final Answer: Sequence of Events

1. Warm air rises and cold air sinks.
2. Friction between the air masses builds up electrical charge in the clouds.
3. The charge grows stronger until it discharges as lightning.
4. Lightning heats the surrounding air to extreme temperatures.
5. The rapid heating causes the air to expand, producing a sound wave — thunder.

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🧠 Explanation of Solution:

The key to solving this sequencing problem is identifying the cause-and-effect chain in the passage:
- Air movement → friction → charge buildup → lightning → heat → expansion → thunder.
- By reading carefully and noting the words like “causes,” “when,” “until,” and “because,” we can determine the logical order of events.

This helps students understand natural phenomena and improve their reading comprehension and logical reasoning skills.

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✔ Bonus Tip for Students:

To remember the sequence, use this mnemonic:
> “Lightning comes first, then thunder follows.”
> Because light travels faster than sound!

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Let me know if you'd like a printable version or a diagram to go with this!