Lesson 2: Moving Water at the Cellular Level
Duration of Days: 4
Lesson Objective
Students will use a model to explain how water moves into or out of cells based on concentration
Why does road salt kill the grass next to the road but not in the yard?
Diffusion, Osmosis, Semi-permeable Membrane, Solute, Concentration Gradient, Turgor Pressure.
DCI: LS1.A (Structure and Function); SEP: Developing and Using Models; CCC: Energy and Matter.
Mathematics in Science: Analyzing ratios of solutes to solvents and predicting net movement based on quantitative gradients.
(DOK 3) Students use the "Osmosis Gizmo" and the "Water Movement Online Lab" to simulate water movement across membranes. They relate "Turgor Pressure" to why plants wilt (loss of water) or stand upright (gain of water).
Roadside Grass: Students explain that the high concentration of salt on the roadside creates an environment where water is "pulled" out of the grass roots via osmosis, causing the plants to dehydrate and turn brown despite spring rain.
The idea that "salt enters the plant and poisons it" rather than understanding that salt stays outside and draws water out.
Differentiation by Content:
Tiered Assignments: Create assignments with varying levels of difficulty to cater to students' abilities. For example, offer a basic level assignment, an intermediate level assignment, and an advanced level assignment.
Flexible Grouping: Group students based on their readiness levels or learning styles. This allows you to provide targeted instruction and support to different groups of students.
Choice Boards: Offer students a variety of activities to choose from, allowing them to select tasks that align with their interests and learning styles.
Differentiation by Process:
Scaffolded Instruction: Break down complex tasks into smaller, manageable steps to support students who need additional guidance.
Graphic Organizers: Provide students with visual tools like Venn diagrams, concept maps, and timelines to help them organize information and make connections.
Technology Integration: Utilize technology tools like simulations, online resources, and educational apps to engage students and provide alternative learning pathways.
Differentiation by Product:
Multiple Assessment Options: Offer students a variety of ways to demonstrate their understanding, such as written reports, presentations, models, or digital projects.
Student Choice: Allow students to choose the format for their final projects, giving them ownership over their learning.
Rubrics: Develop clear and specific rubrics to provide students with expectations and guidelines for their work.
LP 3.2 Checkpoint (Quiz)
https://drive.google.com/drive/folders/1W20yP3cX3k5nBgnRCRUJLrNFlFr3MxFV?usp=drive_link