1.Plate tectonics involveand describe how 2. The theory of plate tectonics explains

Please help (science)

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

Idon't really understand this can you me and show your work.☺☺[ chemistry b] subject [ electron transfer in lonic bonds]grade( 12)

Identify and describe the three ways that mutations affect organisms.