A fan is a cooling device. It makes a hot room feel cold fast when you turn it on either manually or with a remote control. A fan converts electrical energy into mechanical energy through an electric motor. The motor powers the rotation of the fan blades, which in turn …
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A refrigerator is a cooling device for food. It can be described as a heat pump that moves heat from the inside to the outside. A refrigerator vents heat out of the appliance in order to keep your food fresh. It uses a closed system that relies on refrigerant travelling in …
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An air conditioning unit is a cooling device for a room. It can be described as a heat pump that moves heat from the inside to the outside. The air conditioning unit takes the warm air from inside your home, draws it in, and passes it through an expansion valve …
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Alligator is a reptile that is large with a powerful tail used in defence and in swimming. Its eyes, ears, and nostrils are placed on top of its long head. It has a U-shaped snout and its teeth of the lower jaw fit within the teeth of the upper jaw. …
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Crocodile is a reptile that is the largest and heaviest of this animal group. It has a long and massive tail, jaws with many conical teeth and short legs with clawed webbed toes. Its eyes, ears, and nostrils are placed on top of its long head. It has a V-shaped …
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