It takes less time for smaller rocks to wear away because they are constantly moving
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Green Roofs and Vegetation Cover
Green roofs present a great method of lessening the impacts of urban heat islands. Green roofing is the practice of planting vegetation on a roof, just like they are planted in a garden. ... Plants also cool the surrounding environments, thereby reducing air conditioning demands.
Evolution of the brain and more interaction with the world. With the evolution of there brain they got more curious
That statement is true
an HR Diagram would plotted the absolute magnitude of the stars against their color. The resultant plots of this diagram showed that the relationship between the luminosity and temperature of the Star are not Random