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Matter : it is any thing has mass and volume
State of matter : solid , liquid and gases
* matter change from form to another by heating or cooling
Physical change:التغير الفيزيائى
It is a change in the shape and appearance of the matter without change in its structure.تغيير فى الشكل وليس فى التركيب
Examples of physical changes:
1- grinding of sugar.طحن السكر
2- Changing of water into ice or vapour.
3- Melting of wax.انصهار الشمع
Chemical change:التغير الكيميائى
It is a change in the structure تركيب of matter producing another substance with different properties.
Examples of chemical changes:
1- Burning ( sharing ) of sugar.حرق السكر
2- Burning of paper.
3- Iron rust.صدأ الحديد
Fermentation of fruit
* iron rust when water and oxygen exist
Q1: Give reasons:
1- Melting of wax is an example of physical changes.
Because it is changed in the appearance but not in the structure
2- Burning of sugar is an example of chemical changes.
Because it is changed the structure giving a new substance with new properties.
3- Chemical change has a change in properties of matter.
Because it leads to the formation of new substances that have new properties.
Matter
Matter : it is any thing has mass and volume
State of matter : solid , liquid and gases
* matter change from form to another by heating or cooling
Physical change:التغير الفيزيائى
It is a change in the shape and appearance of the matter without change in its structure.تغيير فى الشكل وليس فى التركيب
Examples of physical changes:
1- grinding of sugar.طحن السكر
2- Changing of water into ice or vapour.
3- Melting of wax.انصهار الشمع
Chemical change:التغير الكيميائى
It is a change in the structure تركيب of matter producing another substance with different properties.
Examples of chemical changes:
1- Burning ( sharing ) of sugar.حرق السكر
2- Burning of paper.
3- Iron rust.صدأ الحديد
Fermentation of fruit
* iron rust when water and oxygen exist
Q1: Give reasons:
1- Melting of wax is an example of physical changes.
Because it is changed in the appearance but not in the structure
2- Burning of sugar is an example of chemical changes.
Because it is changed the structure giving a new substance with new properties.
3- Chemical change has a change in properties of matter.
Because it leads to the formation of new substances that have new properties.
