Dynamic Earth Interactive | Test Your Skills Answer Key | #1-30

Which of the earth layers is broken into several large tectonic plates? A. Asthenosphere B. Crust C. Lithosphere D. Outer Core

C. Lithosphere

Mid-ocean ridges are places where tectonic plates are doing what? A. Colliding B. Sliding past each other C. Spreading apart D. None of the above

C. Spreading apart

When did the supercontinent Pangaea start to break up? A. 20 million years ago B. 40 million years ago C. 100 million years ago D. 200 million years ago

D. 200 million years ag

The tectonic plates float on which semiliquid layer? A. Asthenosphere B. Crust C. Inner Core D. Lithosphere

A. Asthenosphere

Mountain formation can result when which of the following occurs? --><-- A. Two oceanic plates collide. B. Two continental plates collide. C. Two oceanic plates spread apart. D. None of the above

B. Two continental plates collide.

Which scientist is credited with proposing the ideas that led to the development of the plate tectonics theory? A. Charles Darwin D. Albery Einstein C. Issac Newton D. Alfred Wegner

D. Alfred Wegner

What is the name of this tectonic plate? A. Cocos Plate B. Nazca Plate C. Scotia Plate D. South American Plate

D. South American Plate

California's San Andreas Fault is identified as which of the following? A. Blind thrust fault B. Dip-slip fault C. Normal fault D. Strike-slip fault

D. Strike-slip fault

What is the earth's outermost layer? A. Crust B. Lithosphere C. Mantle D. Outer Core

A. Crust

What is the name of this tectonic plate? A. African Plate B. Antarctic Plate C. Arabian Plate D. Indian Plate

A. African Plate

What is the border between two tectonic plates called? A. Boundary B. Collision zone C. Rift D. Trench

A. Boundary

What leads to the creation of island arcs? A. Collision of two oceanic plates. B. Collison of two continental plates. C. Collison of a continental and an oceanic plate. D. All of the above.

A. Collision of two oceanic plates.

What type of crust is found under the continents? A. Continental crust B. Oceanic crust C. Geologic crust D. None of the above

A. Continental crust

Which of these statement is correct? A. Continental crust is thicker than oceanic crust. B. Continetal crust is thinner than oceanic crust. C. Oceanic crust is thicker than continental crust. D. Continental and oceanic crusts have the same thickness.

A. Continental crust is thicker than oceanic crust.

Which of the following geologic events can occur at a transform boundary? A. Earthquake B. Mountain formation C. Volcanic eruption D. Rift formation

A. Earthquake

Which is NOT likely to happen at a divergent boundary? <----> A. Mountain formation B. Rift valley C. Seafloor spreading D. Volcano formation

A. Mountain formation

Which kind of plate boundary is found at the meeting point of the Philippine and Pacific Plates? A. Asian boundary B. Convergent boundary C. Divergent boundary D. Transform boundary

B. Convergent boundary

What kind of plate boundary runs across Iceland? A. Convergent boundary B. Divergent boundary C. Nordic boundary D. Transform boundary

B. Divergent boundary

This solid layer of the earth is made up of mostly iron and nickel. A. Crust B. Inner Core C. Mantle D. Outer Core

B. Inner Core

What type of crust is found under the oceans? A. Continental crust B. Oceanic crust C. Geologic crust D. None of the above

B. Oceanic crust

The animation depicts which of the following? A. Earthquake B. Rift formation C. Mountain formation. D. Volcanic eruption.

B. Rift formation

When did the Himalayan Mountain Range begin to form? A. 5,000-6,000 years ago B. 20-30 million years ago C. 40-50 million years ago D. 100-150 million years ago

C. 40-50 million years ago

Which of these concepts is part of the theory of plate tectonics? A. Continents are fixed and don't move. B. A great flood shaped the earth's surface. C. Continents are in slow constant motion. D. None of the above.

C. Continents are in slow constant motion.

Which of these layers is found directly above the earth's core? A. Asthenosphere B. Inner Core C. Mantle D. Outer Core

C. Mantle

What is happening at the subduction zone of the Juan de Fuca and North American Plates? A. Plates are sliding past each other. B. Plates are spreading apart. C. One plate is being pulled under another. D. None of the above.

C. One plate is being pulled under another.

What is the name of this tectonic plate? A. Australian Plate B. Indian Plate C. Pacific Plate D. Philippine Plate

C. Pacific Plate

Approximately 225 million years ago, the earth's continents were grouped into one landmass. What is the landmass called? A. Europa B. Jurassic C. Pangea D. Pangea Ultima

C. Pangea

The animation depicts which of the following? A. Earthquake B. Mountain formation C. Subduction zone D. Rift formation

C. Subduction zone

What is the earth's only liquid layer? A. Asthenosphere B. Inner Core C. Mantle D. Outer Core

D. Outer Core

What kind of plate boundary is found where the North American and Caribbean Plates meet? A. Caribbean boundary B. Convergent boundary C. Divergent boundary D. Transform boundary

D. Transform boundary