4 SECTION – TheWorksheets.CoM – Page 2

4 SECTION 1 Inside the Earth - West Linn-Wilsonville School District

the Earth middle layer of the Earth inner layer of the Earth Percent of Earth’s mass less than 1% 67% 33% 2. The inner core is solid, but the outer core is liquid. Both are made of iron and nickel. 3. The lithosphere contains the crust and some of the mantle. Both the crust and the lithosphere are the outermost layers of Earth.