Do anyone know the answer to these questions?

Question

11. What is shoreline erosion caused by?

12. What's uniformitarianism?

13. What's carbon-14 dating?

14. Know how to calculate the half-life of an element.

15. What’s an isotope?

16. What's natural selection?

17. Know the 4 eras and major events in those eras.

18. Why do scientists study deep-ocean core samples?

19. What is the most abundant element in ocean water?

20. What are the 3 principle gases dissolved in ocean water?

21. What is characteristic of the intertidal zone?

Answer 1

11. Shoreline erosion can be caused by waves/ water.

12. Uniformitism is the assumption that the natural processes operating in the past are the same as those that can be observed operating in the present

13. Carbon-14 dating is a way to estimate the age of an organic compound

15. Isotopes are atoms with alternatate numbers of neutrons.

16. May the best live and weakest die.

18.  To find stuff

19.  Oxygen

Answer 2

I know those answers! I read the book for my class!