Grade 9 Cells & microscopy worksheet

What is on the worksheet

1. A printed image is 38 mm long at 50× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

2. Supplied plant-tissue data show initial mass 8.2 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 %.

3. Supplied plant-tissue data show initial mass 6 g and final mass 6.3 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

4. Supplied plant-tissue data show initial mass 14.8 g and final mass 13.8 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 4 g and final mass 6.3 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

6. A printed image is 7 mm long at 500× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

7. Supplied plant-tissue data show initial mass 12 g and final mass 12.1 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

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

9. A printed image is 80 mm long at 200× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

10. A printed image is 77 mm long at 40× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

11. Supplied plant-tissue data show initial mass 9.2 g and final mass 11.6 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

12. A printed image is 26 mm long at 100× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

13. A printed image is 75 mm long at 500× 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 2.1 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 %.

15. Supplied plant-tissue data show initial mass 3.9 g and final mass 6.6 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

16. An object is 20 µm long and its image is 2000 µm long. Find magnification.

17. A cell is modeled as a cube of side 14 µm. Find surface area divided by volume. This geometry is a simplified model. Round to 3 decimal places if needed. Answer in µm⁻¹.

18. A printed image is 72 mm long at 500× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

19. A printed image is 8 mm long at 100× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

20. Supplied plant-tissue data show initial mass 4.2 g and final mass 5.6 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.