Interior of Earth

In which layer of the Earth are convection currents believed to occur?

• Outer core
• Mesosphere
• Asthenosphere
• Lithosphere

What is the Earth's core believed to be made of?

• Iron
• Magnesium
• Aluminum
• Magma

What is the liquid layer called that lies beneath the mantle and surrounds the inner core?

• Mesopshere
• Lithosphere
• Asthenosphere
• Outer core

The crust is the Earth's only solid layer.

• True
• False

The soft layer in which the tectonic plates move is called?

• Mesosphere
• Asthenosphere
• Inner core
• Outer core

What layer of the Earth is liquid?

• crust
• mantle
• outer core
• inner core

Temperature and pressure increase toward the center of the Earth.

• True
• Flase

What is the solid dense layer of the Earth?

• Mesosphere
• Asthenosphere
• Inner core
• Outer core

Where is the thickest part of a tectonic plate? 

• the middle of the ocean
• a mt range
• in the center of the continent
• a costal plain

Where is the thinnest part of a tectonic plate?

• the middle of ocean
• a mt. range
• center of continent
• a coastal plain