1. Which two elements are mainly found in the inner and outer core?
A. Fe and Ni
B. Fe and Si
C. Ni and Si
D. Ni and C

2. Why is the inner core solid?
A. Even though it is as hot as the surface of the Sun, it has immense pressure upon it
B. Iron and Nickel are only solid
C. Nickel is not dense
D. It is made up mostly of granite and basalt.