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: -
Base
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