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Thermal Energy
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Use of heat energy
Warming , Cooking , Drying washed clothes , Processing food industry , Glass industry and Heating water
Give reasons/ It is made by bonding two glass sheets and leaving a space filled with air between them
To prevent the leakage of heat
Give reasons/Iron is a good conductors of heat , so the railways bars have spaces between them
To expand in hot weather without being twisted to avoid trains accidents
Write the scientific term / 1. Materials that don't let heat flow through /2. A form of energy that transfers from a higher temperature object to a lower temperature object /3. The degree of hotness or coldness of a body
1. ( Heat insulators) /2. ( Heat energy ) /3. ( Temperature )
Give reasons /Copper is considered as a heat conductor
Because it allows heat to flow through
Give reasons /Wood is considered as a heat insulators
Because it doesn't allow heat to flow through
Define heat insulators and give an example
They are the materials that do not let heat flow through / Wood, glass, plastic, paper, wool, rubber and air
Materials and its type Aluminuim and stainless steel
usages / there are used in making /a, Cooking pots \b, Kettles that are used in houses and factories
Define heat conductor and give me an example
They are the materials that let heat flow through / Copper, aluminium, iron, mercury and stainless steel
Define temperature :
It is the degree of hotness or coldness of a body
Give reasons/ When you hold a piece of ice in your hand , you feel cold
Because the heat transfers from the higher temperature object ( your hand ) to the lower temperature object ( the piece of ice
What meant by heat energy
It is a form of energy that transfers from the higher temperature object to the lower temperature object
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