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Grade 8 · Biology

Grade 8 Cells & microscopy worksheet

20 questions on cells & microscopy. The answer key is a separate download.

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What is on the worksheet

  1. Supplied plant-tissue data show initial mass 9.9 g and final mass 12.9 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  2. Supplied plant-tissue data show initial mass 9.9 g and final mass 9.9 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  3. A printed image is 43 mm long at 100× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

  4. Supplied plant-tissue data show initial mass 6 g and final mass 8.3 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  5. Supplied plant-tissue data show initial mass 8.3 g and final mass 7.3 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  6. Supplied plant-tissue data show initial mass 8.4 g and final mass 10.3 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  7. Supplied plant-tissue data show initial mass 7 g and final mass 8.7 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  8. A printed image is 64 mm long at 500× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

  9. Which organelle is a site of photosynthesis in many plant cells?

    1. Chloroplast.
    2. Animal lysosome.
    3. Ribosome.

  10. Supplied plant-tissue data show initial mass 6.5 g and final mass 8.9 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  11. Supplied plant-tissue data show initial mass 4.3 g and final mass 3.6 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  12. A printed image is 46 mm long at 40× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

  13. A printed image is 30 mm long at 40× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

  14. Supplied plant-tissue data show initial mass 7.9 g and final mass 8.7 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  15. Supplied plant-tissue data show initial mass 8.6 g and final mass 11.4 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  16. A printed image is 25 mm long at 400× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

  17. Supplied plant-tissue data show initial mass 7.9 g and final mass 7.4 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  18. A printed image is 18 mm long at 40× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

  19. Supplied plant-tissue data show initial mass 13.5 g and final mass 16.3 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

  20. A printed image is 19 mm long at 100× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

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