What can be used to determine the relative age of two rocks?
a. vertical position
b. the presence of unconformities
c. radioactive dating of each layer
d. the relative age cannot be determined.

Which of the following statements about acidic water is true? a. acid has no effect on the h, o molecules. b. the solution contains a larger number of oh ions than h, o ions. c. the solution contains a larger number of h, o ions than qh ions. d. the solution contains an equal number of h, o ions and oh ions. none of the above e.

What are the similarities of physical and chemical change ?

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons