I!
what is one reason that rock layers are not horizontal
a) they were formed at an angle

b) the area was once covered by water

c) a force push the rock layers after they formed

d) they were formed veritcally

Complete the table for ion charge based upon their losing or gaining electrons in the outer shell. (use the periodic table as necessary.) group most likely ionic charge # of valence electrons i +1 ii +2 iii +3 iv +4 or -4 v -3 vi -2 vii -1 viii 0

What forms when chemical reactions combine pollution with sunlight?

Which of the following would not diffuse through the plasma membrane by means of simple diffusion? 1 oxygen 2 glucose 3 a steroid hormone 4 a lipid soluble vitamin