Plate tectonics ORA

What is the innermost layer of the Earth called?

• Inner Core

• Outer Core

• Mantle

• Crust

Which layer of the Earth is shown in the diagram?

• A) Crust

• B) Mantle

• C) Inner Core

• D) Outer Core

What is the outermost layer of the Earth called?

• Mantle

• Crust

• Outer Core

• Inner Core

Which layer of the Earth is semi-solid and can flow slowly over time?

• A) Crust

• B) Mantle

• C) Outer Core

• D) Inner Core

The outer core of the Earth is composed mainly of ______.

• iron and nickel

• silicon and oxygen

• carbon and hydrogen

• magnesium and aluminum

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

• Solid ball of iron and nickel

• Liquid layer of iron and nickel

• Silicate minerals

• Tectonic plates

Tectonic plates are:

• large slabs of Earth's lithosphere that move over the asthenosphere

• small pieces of Earth's crust that float on water

• layers of Earth's atmosphere

• types of rocks found in Earth's crust

The theory that explains how the Earth's plates are moving over time is called:

• Plate Tectonics

• Continental Drift

• Seafloor Spreading

• Subduction Zones

Why are the plates constantly moving?

• Due to gravitational forces

• Because of tectonic activity

• As a result of ocean currents

• Because of wind patterns

Convection currents in the mantle are caused by:

• the rotation of the Earth

• the heat from the core

• the gravitational pull of the moon

• the movement of tectonic plates