Tectonic Plate Boundaries

What are the layers of the Earth according to their chemical composition?

• Atmosphere, Hydrosphere, Lithosphere

• Crust, Mantle, Core

• Rock, Magma, Ocean

• Lithosphere, Asthenosphere, Mesosphere

Answer explanation

The crust is made of solid rock (mostly basalt and granite) and minerals, the mantle is made of molten iron and magnesium-rich rocks. The core is rich with iron and nickel.

The rigid rocky layer formed by the crust and upper mantle is called the:

• Asthenosphere

• Lithosphere

• Inner core

• Oceanic and continental crust

Answer explanation

Convection currents occur at the ______ which causes tectonic plates to move.

• Crust

• Asthenosphere

• Lower mantle or mesosphere

• Outer Core

• Inner core

Which layer of the Earth is liquid Iron and Nickle?

• Crust

• Mantle

• Outer Core

• Inner Core

Which layer of the Earth is a dense solid ball of Iron and Nickle?

• Crust

• Mantle

• Outer Core

• Inner Core

In convection currents

• Hot magma rises, cool magma sinks

• Hot magma sinks, cool magma rises

What type of boundary is this?

• convergent

• divergent

• transform

What type of boundary is this?

• convergent

• divergent

• transform

What kind of plate boundary is shown here?

• divergent

• convergent

• transform

New crust forms along a(n)

• divergent boundary

• convergent boundary

• transform boundary

Answer explanation