Page 5 - Summary 6 2025
P. 5

Delta Modern Language Schools
Science department
Grade 6
1st term 2024- 2025

                               Cell needs

• The cell needs energy to carry out all its own life processes. G.R
   - To survive and get rid of waste materials.

• Cell needs food (nutrients) and oxygen. G.R

   -To get energy.

• Cell need water. G.R

   -To survive.

   * Note:-

 ➢ Water enters the cell through cell membrane.

  ➢ If there is much water enters the cell it will swell until it bursts, to prevent
     this; cells are able to maintain the proper water balance on both sides of cell
     membrane.

  ➢ New cells come from existing cells.

                     Brief history of the cell

1. The first scientist who discovered the cell is Robert Hooke.

➢ The structure of microscope: -

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