Dynamic Crust Quiz 1

Which part of Earth's interior is inferred to have convection currents that cause tectonic plates to move?

• rigid mantle
• asthenosphere
• outer core
• inner core

For a mid-ocean ridge, where is the youngest bedrock found?

• Middle of Africa

• At a trench

• At the center of the ridge

• Closest to the continents

The only 100% liquid layer of Earth is...

• Inner Core

• Mantle

• Lithosphere

• Outer Core

Two most abundant elements by mass in Earth's crust are...

• Iron Nickel

• Oxygen Silicon

• Aluminum Potassium

• Oxygen Iron

What causes the crust to move?

• convection
• conduction
• tension
• radiation

Process by which new ocean crust forms.

• Seafloor spreading

• Continental drift

• Mid-ocean ridge

• Rift

Magnetic field that points south.

• Modern polarity
• Past polarity
• Normal polarity
• Reversed polarity

The OLDEST seafloor is located? 

• Closest to the mid-ocean ridge
• Farthest from the mid-ocean ridge

What is label G

• Trench
• Mid ocean ridge
• abyssal plain
• sea mount

This scientist was the first to propose seafloor spreading

• William Watts

• Harry Hess

• Alfred Wegener

• Tenzing Norgay