21. The Mid-Atlantic ridge  is an example of 

10.  How does sedimentary rock from the ocean floor sometimes end up in highland and mountainous regions on Earth? 

16. The Earth’s magnetic field is generated in 

33. Minerals that have the same combination of elements but with different atomic arrangements are called

10.  How does sedimentary rock from the ocean floor sometimes end up in highland and mountainous regions on Earth? 

26. The two most abundant elements in the Earth’s crust are

24. What is the primary cause of volcanoes, earthquakes, and mountain building?

20. Movement of the lithosphere 

3.  Secondary waves can travel through all areas of the Earth except the

8. Mohs scale is defined on the basis of minerals that have different