Structure of the Earth

What is the main cause of earthquakes?

• large ocean waves called tsunamis

• movement of tectonic plates

• erosion of topsoil by rivers

• animals burrowing underground

Most of the energy in Earth's atmosphere, oceans and living systems comes from ______.

• the Sun

• magma

• Earth's core

• lightning

Which of the following lists Earth's compositional layers starting with Earth's center and ending with the outermost layer.

• mantle, crust, core

• crust, mantle, core

• crust, core, mantle

• core, mantle, crust.

The Earth's surface is divided up into several large movable tectonic plates. Which of the following is true about these plates?

• The Earth has only continental tectonic plates.

• The Earth has both continental and oceanic tectonic plates.

• The Earth has only oceanic tectonic plates.

• The Earth has neither continental nor oceanic

Faults are:

• found only in the center of the Earth's oceans.

• cracks that prevent tectonic forces from moving pieces of the Earth's crust.

• cracks where pieces of the Earth's crust move past each other due to tectonic forces.

• found only in the center of the Earth's continents.

Which choice correctly completes the sentence?

___ reaches the Earth's surface through ___, then turns into ____.

• Magma; earthquakes; lava

• Lava; volcanoes; magma

• Lava, earthquakes,; magma

• Magma; volcanoes; lava

What do we call the center of the Earth?

• Mantle
• Crust
• Apple
• Core

What layer is between the inner core and the mantle?

• asthenosphere
• crust
• outer core
• lithosphere

Which is the coolest layer of the planet?

• inner core
• outer core
• mantle
• crust

Which two metals are thought to be found in the core?

• iron and steel
• iron and nickel
• gold and silver
• iron and copper