Name _______________________________ Date ____________________ Per. _____

Observing Cells Lab

Instructions: Create a lab report beginning on page 70 of your INB. The title of this lab is Observing Cells Lab.

IntroductionAfter reading through the lab procedures in parts A and B, write a thorough introduction explaining the purpose of this lab. Also use your knowledge about plant and animal cells to add details to the introduction. Your introduction should be at least 7 sentences.

Materials: OnionIodine stainSlide and cover slipDropperToothpickMicroscope

Part A) ONION CELL LABMethod: 1. Obtain a thin slice of onion from the teacher.2. Put a drop of iodine stain on a slide.

- Be careful, stains can ruin clothing and other materials.3. Place onion slice in iodine stain on the slide. The slice should not be wrinkled or folded.4. Put a cover slip over the stain.5. Observe under the microscope under low, medium and high powers. 6. Draw your observations on your paper for low, medium, and high powers. a. Label the cell membrane, nucleus, cytoplasm, and any other organelles you observe (i.e. vacuoles).7. Place your used materials in the designated area.

Part B) CHEEK CELL LABMethod: 1. Obtain a clean slide and cover slip.2. Put a drop of iodine stain on a slide.

- Be careful, stains can ruin clothing and other materials.3. Gently rub the end of a toothpick on the inside of your mouth along the cheek.

- Be careful! Do not gouge out your cheek.4. Stir the toothpick in the iodine stain.5. Immediately, throw the toothpick away.6. Put a cover slip over the stain.7. Observe under the microscope under low, medium and high powers.8. Draw your observations on your paper for low, medium, and high powers.

Name _______________________________ Date ____________________ Per. _____

Observing Cells Lab a. Label the cell membrane, nucleus, cytoplasm, and any other organelles you observe (i.e. vacuoles).9. Place your used materials in the designated area.

Data TableCreate an appropriate data table under the procedures for parts A and B.

Analysis and Conclusion Save room to write a conclusion that describes what you did in the lab and what you discovered.