Grade 5 - L.9 - Structure and Layers of the Earth

The hot hard ball at the centre of the Earth is...

• mantle

• core

• inner core

• crust

The only hard layers of the Earth are...

• crust and inner core

• core and mantle

• inner and outer core, mantle

• lower mantle and outer core

The crust is the layer on...

• under the mantle

• on top of the mantle

• part of the core

• right above the core

Which statement is true for the crust?

• It has the deepest depth.

• It is not hot.

• It is the hardest surface of all the three layers.

• It is the same depth everywhere.

Which is NOT true for the mantle?

• It is the deepest layer of the three.

• It has the highest temperature - up to 6000 degrees Celsius.

• It is build up from substances in semi-liquid state - magma.

• It has two layers - top and bottom layers.

Which one of the statements is wrong about what the outer layers of the Earth are?

• It contains the hard, rocky layers of the Earth.

• It contains the air layer.

• It contains the water layer.

• It is the mantle.

Which outer layer of the Earth is present in all the other layers? It is not interrupted and is a source of many riches.

• Lithosphere

• Hydrosphere

• Pedosphere

• Atmosphere

Which one is the following layer, made of bacteria, fungi, plants, animals and the human?

• Atmosphere

• Hydrosphere

• Biosphere

• Lithosphere

The hardest inner layer of the Earth is...

• Crust

• Mantle

• Inner core

• Outer core

Which inner layer is between 6 - 80 km thick?

• Mantle

• Pedosphere

• Crust

• Core