Inside The Earth - Core - Grade 7

Layers of the earth in order from top to bottom.

• 1. Core

  2. Mantle

  3. Crust

• 1. Crust

  2. Mantle

  3. Outer Core

  4. Inner Core

• 1. Mantle

  2. Crisp

  3. Outer Crust

  4. Inner Crust

• 1. Crisp

  2. Mantle

  3. Outer Crust

  4.. Inner Crust

There are ____ (number of) layers in the earth.

Core is the ____ layer of the earth.

• Outermost

• Center/Middle

• Innermost

There are ____ types of core.

The thickness of the core is ____

• 5300 km

• 3500 m

• 5300 m

• 3500 km

Recent studies have suggested that the inner core is actually found in a (1.) ____ state, due to the (2.)____ of the above layers.

• 1. Solid

  2. Pressure

• 1. Gas

  2. Force

• 1. Liquid

  2. Pressure

• 1. Solid

  2. Force

What is Lava?

• Liquid substance which is present in the core and erupts from the volcanoes.

• Red molten magma which erupts from the interior of the earth through volcanoes.

• Hard rocks which are present underground and melt due to heat and come up till the volcanoes.

The temperature increases ____ degree Celsius for every ____ m of depth in the core.

• 1, 32

• 1, 24

• 5, 62

• 7, 52

____ is a matter in a molten state because of extremely high temperature.

• Nife

• Molten

• Magma

• Lava

Average density of the core is between 3.5g to 5.5g per cubic cm.

• True

• False