Best Answer: The initial size of the star is what decides. A star is huge, I mean really big, and all that gravity wants to pull itself together (everything attracts). So, the star wants to collapse. But, it creates nuclear fusion, and that is the force that pushes the star out.
2015-11-20T10:18:22-05:00. agricultural. The largest use of the world's water is used for irrigation or agriculture. This is because the high demand of food thus agricultural products are demanded to supply at a rapid amount in just a short time. The population growth influences mainly the use of resources and one is water. Fresh water only amounts little to the drastic needs of society today and much is used for agriculture as studies suggest.
Water filters like the one shown in Figure 4.4.1 can be used to remove impurities in areas where this is a problem. Some people use filters to clean their water of impurities. Figure 4.4.1 Water world 98% of the worldâs water is salt water in the oceans. 77% of all fresh water is ice in Antarctica. SciFile Water sources Many of the major water sources for Australiaâs towns are lakes, rivers (such as the one shown in Figure 4.4.2) and water from below the ground.