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Lesson: Cells

Lesson: Cells. All living things are made up of cells. Your body has about 100 million million cells. Cells are very small. We use a microscope to look at cells. Parts of a microscope. Eyepiece. Objective lens. Coarse focus. Stage. Fine focus. Light.

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Lesson: Cells

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  1. Lesson: Cells

  2. All living things are made up of cells. Your body has about 100 million million cells.

  3. Cells are very small. We use a microscope to look at cells.

  4. Parts of a microscope Eyepiece Objective lens Coarse focus Stage Fine focus Light

  5. Click to discover the function of each labelled part. Eyepiece To magnify the image Objective lens Coarse focus To focus on image To find an image Stage Fine focus To hold slide To find a clear image Light To illuminate image

  6. Can you find these parts on your own microscope? Eyepiece Objective lens Coarse focus Stage Fine focus Light

  7. Using the microscope to look at onion cells. What do you need for this experiment?

  8. A plant cell cell wall cell membrane vacuole nucleus cytoplasm chloroplast

  9. An animal cell cell membrane small vacuole nucleus cytoplasm

  10. What parts do plant cells and animal cells have in common? cell membrane cytoplasm nucleus

  11. What parts do plant cells and animal cells NOT have in common? cell wall large vacuole chloroplast

  12. What is the function of each part? Controls what enters and leaves the cell cell membrane Holds cell contents cytoplasm Controls the activities of the cell nucleus

  13. What is the function of each part? cell wall Provides support large vacuole Stores food chloroplast Makes food

  14. Review Question Label each part in the diagram. A F B E D C

  15. Question to think about Why do animal cells not have a (i) cell wall or (ii) chloroplasts? cell wall chloroplast

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