The answer to the question is the total surface area increases and chemical composition changes. Consider the breakdown of rock into smaller pieces, these fragments vary from huge rocks to smaller sizes. As they are so crushed and broken they tend to occupy much of the surface area than when its just a huge rock.
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They receive about 75 percent of what men earn. They take on less of the unpaid domestic labor. They make up approximately 2/3 of the workforce. They no longer work in the lower paying jobs. They receive about 75 percent of what men earn.