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Heat Flow in Natural Phenomena / Heat Conductors and Heat Insulators (Heat…
Heat Flow in Natural Phenomena / Heat Conductors and Heat Insulators
Warming of the Earth by the Sun
Sea Breeze
During the day, the Sun heats up the land faster than sea. Warm air on expands, becomes less dense and rises because it is lighter.
The cold air from the surface of the sea that is more dense is drawn in to replace the warm air on land.
Heat Conductors
The bottom of a pan is made of metal that allows heat to flow quickly to the food.
The base of an iron is made of metal to enable it to conduct heat so that clothes can be ironed quickly.
Mercury in theremometers is a good heat conductor. It can detect change in temperature very quickly.
Good conductors
copper
silver
gold
Land Breeze
At night, the land cools faster than the sea. The air above the sea which is warmer becomes less dense and rises.
The cold and more dense air from land begins to move to the sea resultion in land breeze.
Head Insulators
Cooling utensils made of wood are capable of preventing heat from flowing to the hand while cooking.
Oven globes that are heat insulators can prevent your hands from getting scalded while taking food trays out from the oven.
The wall of a ice box is made of fibreglass or polystyrene, which are the heat insulators that can maintain the coolness of substance inside the box.