Plant Cells Under Changing Water Conditions
Written by Adi Ackerman, Head Teacher
"Plant Cells Under Changing Water Conditions" is written for 7th Grade (Ages 12-13), and it covers NGSS MS-LS1-2. 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: classify plant cells in fresh water and salt water and compute percent mass change of potato strips. Answer key included. Part of our cells living things collection. Aligned to NGSS standards.
How do I use this worksheet?
Begin with the color code sheets and the lifestyle sheet, then use the case studies and mystery cells for application. Close with the mitosis group of sheets.
What students will practice
- Students will define osmosis and turgor and describe a plant cell in fresh water and in salt water.
- Students will calculate the percent change in mass of potato strips in salt solutions.
- Students will explain what the changes in mass show about water moving across a membrane.
Curriculum Links
Next Generation Science Standards
Science · 7th Grade
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FAQ
How do I use this cells worksheet?
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Begin with the color code sheets and the lifestyle sheet, then use the case studies and mystery cells for application. Close with the mitosis group of sheets.
What does this worksheet teach?
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Classify plant cells in fresh water and salt water and compute percent mass change of potato strips. The directions on the page read: Read the text. Then use the word bank to write the state and water condition of each cell. An answer key is included.
Can I use this cells 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.
What do organelles do?
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The nucleus holds DNA, mitochondria release energy, chloroplasts capture light, lysosomes hold digestive enzymes and the endoplasmic reticulum makes proteins.
How do plant cells react to water?
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In fresh water a plant cell becomes turgid as the vacuole swells and presses against the wall. The potato strip data shows how mass changes in salt solutions.
What are the stages of mitosis?
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Interphase, prophase, metaphase, anaphase, telophase and cytokinesis. Each new cell gets a full copy of the DNA.
How does a cell membrane control what enters?
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It is a phospholipid bilayer that lets small uncharged molecules pass, needs channels for ions and blocks large molecules.
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Worksheet Details
| Grade | 7th Grade |
| Subject | Science |
| Topic | Living Things |
| Standard | MS-LS1-2 |
| Pages | 2 pages |
| Difficulty | Medium |
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