Science | Prep.1 | Matter and its characteristics | Part (4|4) | Unit One - Lesson One

In This part we will study :
Substances can be classified according to electric conduction into :
A. Good conductors of electricity
(substances allow electricity to flow through)
Examples:
•Metals
as iron, silver, copper, aluminum

• Some solutions
as acidic solutions, alkaline _solutions and some salt solutions.
B. Bad conductors of electricity
(substances don't allow electricity to flow through)

Examples:
•Gases.
• Some solid substances
as sulphur, phosphorus, wood and plastic.
• Some solutions as :
- solution of hydrogen chloride in benzene.
- sugary solution.
Life applications of electric conduction :
1. Electric wires (or cables) are made up of copper or aluminum and covered with a plastic layer.
Because both of copper and aluminum are good
conductors of electricity, while plastic is a bad
conductor of electricity.

2. Electric screwdrivers are made up of steel iron, while their handles are made up of wood or plastic.
Because steel iron is a good conductor of
electricity, but wood and plastic are bad
conductors of electricity.
Substances are classified according to thermal conduction into :
A. Good conductors of heat
B. Bad conductors of heat

Chemical properties
A. Very active metals :
B. Less active metals :
C. Inactive metals:

لينك تحميل الملزمة :
Prep.1 - unit One - lesson One - First Term 2020


تم شرح هذا الدرس في (4) فيديوهات شاهدها بالترتيب
Matter and its characteristics
(Part (1/4

(Part (2/4

(Part (3/4

(Part (4/4 تشاهده الان


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بالتوفيق
مستر احمد الباشا

density,Matter and its characteristics,Matter,volume,Mass,The color,taste and smell,Melting point,Hardness,Electric conduction,Boiling point,الساينس,مستر احمد الباشا,The measuring unit of density,Life applications of the density,Equal volumes of different materials have different masses,Equal masses of different materials have different volumes,Copper – gold Alloy,Nickel – chrome Alloy,Chemical properties,Very active metals,Less active metals,Inactive metals,