Sodium hydroxide is added to solution M. A reddish-brown precipitate is formed, solution M contains: a) iron(||) ions

b) iron(|||) ions

c) copper (||) ions

d) silver (|) ions ​

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist

The most common form of matter in the universe