Look at the picture of an electromagnet that has picked up one sewing pin. Which change could you make to allow the electromagnet to pick up more sewing pins? ( h O A. Use twice as many coils of wire around the nail. OB. Use a nail that is much larger than the one shown. O C. Use half as many coils of wire around the nail. O D. Use a nail made of a nonmagnetic material

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?