No unit on cell structure and function is complete without comprehensive lessons on cellular transport. Students need a solid understanding of osmosis, diffusion, concentration gradients, solute concentrations, hypertonic and hypotonic solutions, active and passive transport, etc. This classic lab...| TPT
Teaching osmosis? Use this lab to show students how water crosses a semi-permeable membrane to reach equilibrium! In this lab, students will soak baby carrots in fresh water and salt water overnight, and calculate the percent change in mass. Materials Needed Per Group: 2 Baby carrots, electronic scale, 2 beakers, salt, distilled water, spoon or stir rod, calculator| Science Lessons That Rock
In this fool-proof lab, students observe purple onion skin under the microscope. Using both fresh water and salt water, they will observe the effects of hypertonic and hypotonic solutions on the onion cells. No dye needed! This lab worksheet is editable. Materials Needed: Microscopes, slides and cover slips, purple onion, water, salt, beakers, tweezers or scalpel, eyedroppers, and paper towels.| Science Lessons That Rock
I’m excited to share with you an EASY PEASY way for students to see osmosis in plant cells! In the past, I always used elodea leaves for this lab. Elodea can be hard to find at pet stores and is a little temperamental to keep alive. This year I decided to use onion skin from ... Read more| Science Lessons That Rock