Wednesday, January 23, 2008


In a World without Water as we know it

Since water molecules form hexagonal structures when they freeze, they are more spread out then when they are in the liquid form. Therefore the liquid form is denser then the solid form. If the molecule changed so that it was denser when it froze, it would sink. Ice fishing wouldn’t exist. Life could not exist on top of ice such as penguins and polar bears. Plant life wouldn’t exist in the winter because it would be crushed by the sinking ice. Fish would have a hard time finding food and could possibly go extinct.
Capillary Action occurs when the hydrogen atoms from the water molecules are attracted to the hydrogen atoms in glass molecules. It involves both adhesive and cohesive forces which pull the water molecules upward. Cohesive are forces are between molecules of one substance, and adhesive are forces between two different substances. If capillary action did not exist, candles wouldn’t work because oil couldn’t move up the wick. Back when candles were the only form of light it would have been impossible to see in the dark. Also, all the plants on earth would die because the water from the roots would not be able to travel up to the leaves. Diabetics would need a different way of checking their blood because pricking their finger would not get any blood up the tube. Another example would be that measurements would be more accurate when measured in a tube or cylinder.
Hydrogen bonds are what keep water held together. They are very strong bonds so that waters surface is hard to break. Hydrogen bonding pulls all molecules to one center. The result of this is beading on nonabsorbent surfaces and rain droplets in the shape of water. Water bugs wouldn’t exist because they use high surface tension to walk on the water. Water wouldn’t fall in drops it would just come down in a mist, and flat objects that usually float would sink because the high surface tension wouldn’t accommodate to its shape.
Water’s high heat capacity is due to the fact that the water molecule is polar, therefore it sticks together really well. More energy is required to break apart polar molecules because it is harder to do. Water can absorb more heat before it evaporates because it takes more heat to break it apart. If water didn’t have a high heat capacity, it would boil at a smaller temperature, and cool much more quickly. Food would not stay hot for very long so you would have to eat much more quickly. Islands tend to have less extreme temperatures then other places because they are surrounded by water so the temperature of the water keeps the temperature of the land constant.
Water freezes from the top down, because the surface of the water is in contact with the air, which is more cold then the bottom of the lake. The top layer freezes and sinks a tiny bit. It is then replaced by warmer water. This freezes on top of the first layer and sinks it more. So the cycle of this is what makes water molecules freeze from the top down. If it froze from the bottom up, we would not be able to walk on the ice, we would have to wait until the whole body of water froze. Also, it would kill all of the vegetation and then the fish would die form not eating.
Since the melting and freezing point are both 0 degrees Celsius, ice and water can co-exist at a certain temperature. There is a cycle so that all three faces happen at the same time. When water freezes it also melts, and when it evaporates, it also condenses. It couldn’t rain if all the water was permanently frozen. Our bodies wouldn’t function because our blood would not circulate. Ice bergs would not be found in the ocean. We couldn’t cook food by boiling. Your glass would never become sweaty. Water would never purify itself if it never evaporated and then condensed. We depend on water in each state so we would all die.

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