1. Evaporation is the escape of water molecules from their liquid phase to gas phase that go up into the atmosphere. Evaporation can occur anywhere where open liquid water is exposed to sunlight or any other source of energy. Transpiration, on the other hand, is the loss of water (by evaporation) from plants through the stomata. Evaporation and transpiration move water from the biosphere to the atmosphere.
2. Condensation is the return of water molecules from gaseous phase (vapor) back to liquid form. Precipitation, on the other hand, is the coming down of condensed water from the atmosphere to the earth (biosphere), which is a significant part of the water cycle.
3. Exchange pool is the pool from (or approximate amount) which water or other elements are shared (back and forth) between different spheres (such as biosphere, atmosphere, and hydrosphere) in a cycle. A reservoir on the other hand is analogous to a ‘container’ that holds large masses of water or other elements such as a lake and the atmosphere.
4. The answer is No. because, today’s waters, due to increased pollution from industrialization that spews a lot of pullutans into the atmphere, ae contamiated. The water that precipitates is tainted by gases such as sulphuric dioxide tha makes it acidic. The water also gets polluted by other pollutants in the atmpshre and biosphere and hence become a health risk to animals and humans that drink it.
During pregnancy the fetus depends on its mother for nourishment and oxygen since it cannot breathe air it's blood circulates differently than it does after birth.
Due to the circumstances stated above the mothers womb develops an organ known as the placenta that develops and implants in the mother's womb during pregnancy to provide oxygen and nutrients to the growing baby and remove waste products from the baby's blood
The fetus is connected to the placenta by the umbilical cord which contains blood vessels that transport nutrients and oxygen from the mothers blood to the baby and also transports waste products and carbon dioxide from the baby to the placenta and then to the mothers circulatory system to be eliminated.
