Planet Earth

• The shape of the earth is an oblate spheroid.
• The mean diameter of the Earth is 13000 kilometers.
• The earth's internal divisions are the crust, the mantle, outer core, inner core.
• The mantle is mostly molten rock
• The crust is made up of solid rock
• The outer core is liquid iron and nickel
• The crust is made up of tectonic plates that move around on top of the mantle
• The inner core is solid iron and nickel
• Label the following major divisions:

  A) tropic of cancer

  B) equator

  C) tropic of capricorn

  D) arctic circle

  E) antarctic circle

  F) north pole

  G) south pole