The Earth's layers are arranged from outside to inside as follows.................

• crust, core and mantle.

• mantle, crust and core.

• crust, mantle and core.

• core, mantle and crust.

The inner layer of the Earth is called the................

• mantle.

• crust.

• core.

• pole.

The outer layer of the Earth is called...............

• crust.

• mantle.

• inner core.

• outer core.

The thickness of the mantle layer is about................km approximately.

• 2250

• 2900

• 2885

• 2270

The layer which consists of molten metals is the..............

• crust.

• mantle.

• outer core.

• inner core.

The Earth's inner core contains in a solid state.

• iron and copper

• nickel and copper

• iron and nickel

• copper and aluminium

The outer core of the Earth exists in ..................state.

• solid

• gaseous

• liquid

• molten

The radius of the inner core is about.............. km approximately.

• 50

• 1350

• 2100

• 2885

.....................is the smallest Earth's layer in thickness.

• Crust

• Inner core

• Mantle

• Outer core

True or False. The Earth's crust is thick melted rock

• True
• False