Understanding Earth's Structure

What is the shape of the Earth?

• Cube

• Oblate spheroid

• Flat disc

• Perfect sphere

How many main layers does the Earth have?

• Five

• Three

• Nine

• Seven

What is the primary composition of the Earth's inner core?

• Magnesium and aluminum

• Silicon and oxygen

• Iron and nickel

• Carbon and hydrogen

Which layer of the Earth is liquid?

• Crust

• Lower mantle

• Outer core

• Inner core

What is the main characteristic of the mantle's magma?

• It is gaseous

• It flows very slowly

• It is completely liquid

• It is solid and immovable

What is the asthenosphere?

• A layer within the upper mantle

• The outermost layer of the Earth

• A type of oceanic crust

• The core of the Earth

What is the Earth's crust primarily made of?

• Gaseous elements

• Liquid magma

• Metallic core

• Solid rock

Which type of crust is denser?

• Neither is dense

• Both are equally dense

• Oceanic crust

• Continental crust

What process involves the movement of Earth's lithospheric plates?

• Volcanism

• Sedimentation

• Erosion

• Plate tectonics

What is the lithosphere composed of?

• Only the crust

• Only the mantle

• The crust and uppermost mantle

• The core and mantle