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Hipervinculo Química
A crystal is an organized group of molecules, each with their own shape. For example, snowflakes are made of ice crystals and each snowflake is different. You can make crystals by using salt or sugar. ...
Hipervinculo Ciencias de la Tierra y Medioambiente
When we look around, we do not typically see ‘air’ so it is easy to assume that our air is clean. In reality, our atmosphere is made up of mostly invisible gases. Additionally, most air pollutants are ...
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