1. AIM: What do the organelles of plant cells look like under a microscope? DN: How do we find the magnification of a microscope? Find the magnification of low power (yellow) and high power (blue) under the microscope in front of you. HW: Castle Learning- cells Cells Exam- Tuesday – Cellular organization, cell theory, life functions, cell organelles, microscope

2. Total Magnification Ocular Lens X Objective lens= total magnification Low Power (yellow): 10 X 10 = 100X High Power (blue): 10 X 40 = 400X

3. Pre-Lab Questions 1.What is an organelle? Structure inside a cell that carries out a specific function. 2. What is the difference between a plant cell and an animal cell? Plant cell: chloroplast and cell wall Animal Cell: centrioles

4. 3. What is the function of the following organelles? Cell Wall: Protection and Support Cell membrane: determines what can enter and leave the cell Vacuole: storage of water/nutrients/waste Chloroplast: photosynthesis Cytoplasm: where all cellular activity takes place Nucleus: controls all cellular activity

5. Elodea

6. Elodea: Invasive Species in NYS

7. Naja

8. How to make a wet mount slide

9. 1.Prepare a wet mount slide 2.Focus under scanning on microscope (red) 3.Switch to low power (yellow) 1.Can turn coarse and fine adjustment to focus 2.Draw one row of cells across the middle- be sure to count how many cells fit across!! 4.Switch to high power- don’t move coarse adjustment before switching!! 1.Can only turn fine adjustment 2.Draw one row of cells across the middle 3.Label the chloroplasts and cell wall

10. Elodea: yellow- low power 100X

11. Elodea: blue- high power 400X

13. Cell Measurement 1mm = 1000um FOV= 2mm 2mm = _______________ um Divide FOV (um) by # of cells that fit across To convert: mm  um: multiply by 1000 (move decimal 3 places to right) Um  mm: divide by 1000 (move decimal 3 places to the left)