BES: Osmosis and Diffusion Please open your journal to warm ups! May 10, 2019 Please open your journal to warm ups!

Check out your plants… Measure all your seedlings and calculate the average for DAY 7. Record in your data table. Record the control measurements in your data table. Make sure you have water.

Warm Up 5-10-19 Complete the questions below: How is life organized at different levels? How do animal cells differ from plant cells? How do plants phytoremediate at the cellular level? Atom – Molecule – Organelle – Cell – Tissue – Organ – Organ System - Organism Plants have a cell wall , chloroplasts and large vacuoles, animal cells do not. Hyperaccumutors will store copper and zinc in vacuoles so those metals don’t interfere with the photosynthesis occurring in the chloroplasts.

QUIZ over Mod 6 on TODAY! 14 pt multiple choice All journals should be closed. No other tabs should be open on your computer. Go to “Quizzes” and complete Mod 6 Quiz. When finished, put your laptop lid down. While waiting, think about how you are going to inform to the local Maple Valley community about your research findings.

5/10/19 Osmosis and Diffusion Introduction Let’s watch a video first for an introduction. Make sure to listen to the concepts, you will be completing an activity afterward. Define these key terms during the video: Diffusion Concentration Gradient Osmosis Semi-permeable membrane Osmosis & Diffusion Video Clip

Notes: Important Terms… Diffusion The movement of particles from an area of high concentration to low concentration down a concentration gradient. Concentration Gradient Gradual change in concentration between two particles in a solution. Osmosis The movement of water molecules, usually from an dilute solution to a concentrated solution. Semi-permeable membrane This is a membrane that allows some particles through but not others, usually dependent upon size.

Notes: More terms… Names for Concentration Gradient Situations An isotonic solution has an environment where the concentration of solutes outside the cell equals the concentration of solutes inside the cell. ‘Iso-’ means ‘same’. A hypertonic solution is one in which the concentration of solutes outside a cell is greater than the concentration inside (‘hyper’ means ‘over’). A hypotonic solution is one in which the concentration of solutes outside the cell is lower than the concentration inside (hypo means ‘under’).

Solution Images

Chara Cells Cheek Cells Red Onion Cells

Set up Red Onion Cells again! In your NOTES section: 5/10/19 “Osmosis in Red Onion Cells” Set up two wet mount slides. Use the red part of the onion. On slide 1 use an onion in water. On slide 1 use an onion that has been sitting in salt water. Draw a sketch of each sample at the medium power. Label at least two organelles. Red Onion in TAP water. 100 x Red Onion in SALT water. 100 x

Explain what happened to the cells in the salt water. Draw a picture showing salt and water molecules and where the molecules were moving. Tell me whether the solution the onion cells were sitting in were hyper, hypo, or isotonic. Red Onion in TAP water. No salt molecules Red Onion in SALT water.

Work on the handout scenarios Work on the handout scenarios! You may need to search for some answers online, use a laptop! DUE: Tuesday, May 14th