Download Lesson #3: Plant cells

Lesson #3: Plant cells
Objective:
- Make, draw and label plant cells
Homework Review: Parts of a Cell
• Cell wall: A tough, rigid covering made of cellulose giving
support to plant cells.
• Vacuole: A large space filled with cell sap (a weak solution
of sugar and salt) in plant cells.
• Chloroplast: Only in plant cells. Contain chlorophyll
used for photosynthesis.
• Cytoplasm: Jelly-like semifluid where all the chemical
reactions happen
• Cell Membrane: A thin skin around the cell holding it
together. It also controls what goes in and out of the cell.
• Nucleus: Controls what the cell does. Contains DNA
Making a plant slide
1. Take a single leaf from the stem of an Elodea plant.
2. Mount it in a drop of water on a slide using a mounted
needle.
3. Carefully lower a cover slip onto the slide using the
mounted needle.
4. Place the slide on the microscope stage and focus under
low power.
5. Change to a higher power lens.
6. Observe – draw two or three cells and label the visible
structures. You should be able to see the cell wall,
chloroplasts and vacuole.
7. Look at a cell from an onion root. What part of the plant
cell is missing? Why?
Let’s make a human plant and animal
cells!
Remember:
Plant cells have:
-chloroplast, cell wall and vacuole
Closer
In groups, sort the images into plant and animal
cells, be sure to explain why using the correct
vocabulary.
Remember that next class you will be assessed
on plant and animal cells next class.