Answer:
because harmful substances often chemicals or microorganisms contaminate a stream, river, lake, ocean, aquifer, or other body of water, degrading water quality and rendering it toxic to humans or the environment.
Explanation:
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Answer:
It should be the persians.
Explanation:Technically it is persians since they're referred to that even today although iranians referred to themselves as aryans back then.
<span>B. Neptune, Uranus, Saturn, Jupiter, Mars, Earth, Venus, Mercury </span>
Uranus was officially discovered by Sir William Herschel in 1781
Uranus turns on its axis once every 17 hours, 14 minutes
Uranus makes one trip around the Sun every 84 Earth years
Uranus is often referred to as an “ice giant” planet
Uranus hits the coldest temperatures of any planet
Uranus has two sets of rings of very thin set of dark coloured rings
Uranus’ moons are named after characters created by William Shakespeare and Alaxander Pope
Answer:
Definition: U-shaped valleys form through glacial erosion. Glaciation develops in established v-shaped river valleys where the ice erodes the surrounding rocks to create a “U” shaped valley with a flat bottom and steep sides. Glacier movement is driven by gravity
