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To keep oxygen in the water for the bacteria that "eat" wastes in the water to help purify it. If the oxygen level gets to low, the bacteria die, and the water in the basin doesn't get cleaned.
The First Step of seperating sewage is called Screening! Screening: the water flows through a grate to remove large solid objects from the water. The debris that gets caught on the grate is cleaned off at regular intervals.
A water wheel
first position a pitch gets in before pitching
Not much. it increases stopping distance slightly while discs are wet, but they dry out pretty fast. Just tap the pedal a few times when stopping on a rainy day before you hold.
less water is pumped out of when it is reaplaced
it does it the water gets cleaned professionally cleaned if it is the water that we drink .
watershed
watershed
water gets cleaned with many different chemicals when it gets processed and sent to your tap at home, or put in bottles for you to drink.by a machine :)
It comes out of an auqafer in the ground and then gets filtered, then it comes to is in the stores..........
underground, through the process it gets filterd and turns into clean water, then is pumped out for ect.. uses
Fish have gills- thy are similar to lungs, but water gets pumped through them. Oxygen dissolved in the water transfers (in the gills) to the bloodstream of the fish, and carbon dioxide gets flushed out.
router
ANSWER:The answer is very simple. Blood is the fluid that gets pumped by the heart.
I live near the rockies in Colorado, so most of my water comes from the snow melt, then it gets filtered and pumped to my house.
A river gets cleaned by the process similar to wwtp.In the middle coarse of the river it's speed is slow hence all the suspended impurities setttle at the bottom and the water that reaches the sea is clean.