Stomata, Transpiration and Water Loss Data
Written by Adi Ackerman, Head Teacher
"Stomata, Transpiration and Water Loss Data" is written for 7th Grade (Ages 12-13). A 6th grader who is already steady on living things can use it too, and an older student can use it as a short review.
2 pages in this set
7th grade science worksheet: read about stomata, graph three sets of plant water loss data and compare the rates. Answer key included. Part of our photosynthesis and respiration living things collection.
How do I use this worksheet?
Start with Where Plant Mass Comes From so students know the equation, then use Stomata, Transpiration and Water Loss Data to apply it. The page 1 passage and table on the stomata sheet are the reference for the graph on page 2.
What students will practice
- Students will describe how guard cells open and close stomata and how that lets water vapor out of a leaf.
- Students will plot three sets of sample data on water lost by a plant and label each line.
- Students will calculate a rate of water loss from a table and use it to answer questions.
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FAQ
How do I use this photosynthesis and respiration worksheet?
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Start with Where Plant Mass Comes From so students know the equation, then use Stomata, Transpiration and Water Loss Data to apply it. The page 1 passage and table on the stomata sheet are the reference for the graph on page 2.
What does this worksheet teach?
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Read about stomata, graph three sets of plant water loss data and compare the rates. The directions on the page read: Read the passage, study the diagram and read the table. You will graph the data next. An answer key is included.
Can I use this photosynthesis and respiration worksheet for homeschool or classroom?
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Yes, both. We made it for 7th grade living things, and it works the same at home or at school. At home, a student can work through it alone and then go over it with you, which shows quickly what is solid and what needs another look. In class it works as independent practice, homework or a warm-up, and you can print one copy or a full set.
Where does a plant's mass come from?
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Van Helmont's willow gained about 164 pounds while the dried soil lost only about 2 ounces, so the soil was not the main source. The tree built its mass from water and from carbon dioxide in the air. Where Plant Mass Comes From has students count the atoms in the photosynthesis equation.
What are stomata?
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Stomata are tiny pores on the underside of a leaf, each surrounded by two guard cells. Open stomata let carbon dioxide in for photosynthesis and let water vapor out in transpiration.
Why do plants lose water through their leaves?
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Water vapor leaves through open stomata, and this loss is called transpiration. Stomata, Transpiration and Water Loss Data compares plants in shade, in sun and in sun with wind.
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Worksheet Details
| Grade | 7th Grade |
| Subject | Science |
| Topic | Living Things |
| Pages | 2 pages |
| Difficulty | Medium |
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