The water we drink today is the same water that the dinosaurs once drank. Please explain answer.
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This site has a great explanation of the water cycle.
http://www.kidzone.ws/WATER/
The water we drink here in Austin is the sewage from Lake Travis.
Water has been recycled for thousands of years: What was originally made, is still used.
http://www.lyricsmode.com/lyrics/t/tom_lehrer/pollution.html
The water we drink today is not the exact same water that the dinosaurs once drank, but rather part of the same global water cycle that has been in existence for billions of years. The water on Earth is constantly recycled and re-used, through the processes of evaporation, condensation, and precipitation.
Here's a step-by-step explanation of how the water cycle works, which will help you understand why the water we drink today is connected to the water the dinosaurs once drank:
1. Evaporation: The sun's heat causes water from oceans, lakes, and other bodies of water to rise into the atmosphere in the form of water vapor.
2. Condensation: As the water vapor rises higher into the cooler parts of the atmosphere, it begins to condense into tiny droplets, forming clouds.
3. Precipitation: When the droplets in the clouds grow too large to be held by air currents, they fall to the Earth as precipitation, which can be rain, snow, sleet, or hail.
4. Infiltration: The precipitation that falls on land can be absorbed into the ground, becoming groundwater.
5. Runoff: Some of the precipitation flows over the land's surface, gathering in rivers, streams, and eventually making its way back to the oceans.
6. Transpiration: Plants absorb groundwater through their roots and release water vapor into the atmosphere through tiny openings in their leaves, a process called transpiration.
7. Repeating the cycle: The water that enters the atmosphere through evaporation, condensation, and transpiration will eventually fall back as precipitation and continue the cycle.
So, while the specific molecules of water that were once consumed by dinosaurs have long since been recycled, the water we drink today is part of this continuous cycle. The water that filled the bodies of ancient organisms, including the dinosaurs, eventually evaporated, became part of clouds, fell as rain or snow, and then flowed through various processes until it reached our drinking water sources.