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Unit 1 - Lesson 2 : Matter Construction

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Ahmed Hussein

on 24 August 2016

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Transcript of Unit 1 - Lesson 2 : Matter Construction

Unit 1 - Lesson 2 : Matter Construction
Mr.Ahmed Elbasha
The living organism consists of a group of organs and each organ is composed of a number of cells …
thus the cell is the structural unit of the living organism.
The matter is formed of very small structural units known as molecules.
Matter Construction
1. Put some perfume in a glass bottle and measure its mass, using a
sensitive balance.
2. Open the bottle for a period of time, then take it to another side of
the classroom.
• What do you observe? ......................................................................................
• Conclusion: ................................................................................
3. Measure the mass of the bottle again.
• What do you observe? ................................................................................
• Conclusion: ..........................................................................
(Matter is composed of molecules)
1. Put a small amount of potassium
permanganate in a glass beaker
containing water.
2. Leave the beaker a period of time.

Activity 2 Motion of molecules
alcohol to 300 cm3 of water
in a measuring cylinder, then
measure their volume.
• What do you observe? ............
• Conclusion: ...............................
The volume of the mixture is
less than 500 cm3, this means
that some of alcohol molecules are distributed in the intermolecular
spaces found among water molecules. This proves that there are
intermolecular spaces between molecules
Activity 3 :Matter molecules are in a continuous motion.
1. Matter molecules are in continuous motion, limited in solids, more free in liquids and completely free in gases.
2. Intermolecular spaces are found among molecules which are tiny in solids, little big in liquids and very large in gases.
3. Attraction forces among molecules are very strong among solids, weak in liquids and almost not existed in gases.
From the previous, we can summarize molecules properties as follow:
1. Try to fragmentize a piece of iron with your fingers or by hammering it.
2. Try to divide an amount of water on small cups.
• What do you observe? .....................
• Conclusion:..............
Activity 4 (Forces of attraction among molecules)
Wait for part 2 of lesson 1
Thanks
The perfume particles are divided into tiny particles that can not be
seen via naked eye nor even by a microscope, these particles are spread and carried through the air in the room having the perfume properties.
These particles are called molecules.
Molecule:
is the smallest particle of a matter which can be existed
freely and it has its own matter properties.
Permanganate salt
is dissociated into particles and spread in the water
gradually in all directions until all the water has been coloured in violet,
and this proves that permanganate particles are in continuous motion
allowing them to spread among water molecules.