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Grade 8 Integrated Science Project 2024: Teacher Step by Step Guide

M956129

Institution: Junior Secondary

Course: Integrated Science

Content Category: Research Projects

Posted By: 35824167

Document Type: PDF

Number of Pages: 12

Price: KES 80
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Summary

INTERGRATED SCIENCE
GRADE 8 2024 PROJECT
STEP BY STEP GUIDE TEACHER GUIDE
STRAND: LIVING THINGS AND THEIR ENVIRONMENT
SUB-STRAND: MOVEMENT OF MATERIALS IN AND
OUT OF THE CELL
STEP ONE: Outlining the process of Osmosis
There are two physical processes which are very important to
living organisms and these are:
a. Diffusion
b. Osmosis
They are important because they are the processes by which
many of the substances needed by living cells move in and from
place to place within the living organism.
Osmosis is a special form of diffusion which is caused by the
presence of membrane which allow some molecules to move
through it, but not others.
For example: if water is placed on one side of the membrane
(selectively permeable membrane) and a solution of sugar in
water is placed on the other side of the membrane, water will
move towards the sugar through the membrane.
Osmosis therefore is the process where solvent molecules
(water) move from a lowly concentrated solution (dilute) to a
highly concentrated solution across a semi-permeable
membrane.


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