The graph of a function never has two different points with the same x-coordinate because_ A. the graph of a function
B. the graph of a function is a vertical line
C. each input value is mapped to a single output value
D. each input value is mapped to more than one output value

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?