Final Answer:
The sun’s heat causes transpiration.
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Explanation:
- The sun heats up water in lakes, rivers, and soil.
- Plants drink that water through their roots.
- The water travels up the stem to the leaves.
- When the sun shines on the leaves, the water turns into vapor (like steam) and escapes into the air.
- That whole process — water going from inside the plant to the air — is called transpiration.
- So, the main cause? The sun’s heat!
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Teach the Topic:
Transpiration is like when a plant “sweats.” Just like you sweat when you’re hot, plants let out water vapor through their leaves to cool down. It starts with the sun warming things up, then the plant pulls up water from the ground, and finally, the water evaporates out of the leaves.
Simple example:
Imagine you have a wet towel hanging outside on a sunny day. The sun makes the water in the towel turn into invisible steam and disappear into the air. That’s evaporation. Transpiration is just like that — but it happens inside a plant!
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Practice Task:
Draw a simple picture of a plant and label these parts: root, stem, leaf. Then write one sentence explaining how the sun helps the plant lose water.
Parent Tip: Review the logic above to help your child master the concept of plant transpiration worksheet.
