The Dynamic Earth

What is the theory of plate tectonics?

• The that theory that the Earth moves around the sun

• the theory that the tectonic plates that make up the lithosphere are constantly shifting

• The theory that the continents remain in a fixed position

• The theory that the continents remain in a fixed position

Continental drift is ______________________.

• The change of temperatures on Earth due to the position of the sun

• The organisms who have populations that have drifted to other continents over time.

• The idea that the continents have always been separate

• The movement of continents across Earth’s surface over time

Pangea is _____________________

• The giant mountain range that runs along the Atlantic Ocean

• The continent where most people live

• The supercontinent that may have existed in the past.

• The giant canyon that runs along the deepest part of the Pacific Ocean

Which of the following are evidence that the continents have moved over time? Select all that are true

• Glacier striations have been found on continents with warmer climates

• Fossils of one type of species are found on multiple continents

• There are similar land features on multiple continents

• All tropical rainforest are near the equator

What is a mid-ocean ridge?

• The zone of the ocean floor that separates the thin oceanic crust from the thicker continental crust

• A small valley that runs along the ocean floor

• A large canyon that makes up the deepest part of the ocean

• A giant mountain range that runs along the ocean floor

Tectonic Plates are ______________________.

• Deep valleys that form when the Earth’s crust pulls apart

• Giant, irregularly shaped slabs of rock floating on the Earth’s lithosphere

• Large, pillow like rocks found on mid-ocean ridges

• Small, irregular rocks on the ocean floor

Sea-floor spreading ___________________.

• Occurs when oceanic crust returns to the mantle after it has cooled down

• Occurs when landforms develop on Earth’s surface from colliding plates

• Occurs when Magma rises through the cracks in a mid-ocean ridge, cools, and hardens to form new oceanic crust

• Occurs when oceanic crust becomes continental crust over time

A divergent boundary___________________.

• Forms when two plates move away from each other

• Forms where two plates slide past each other moving in opposite directions

• Forms where two plates create a volcano

• Forms when two plates collide with one another

Which type of stress slides rock away from each other horizontally?

• Tension

• Divergent

• Compression

• Shearing

Which of the following statements is NOT true about faults?

• All faults are the same size.

• Faults occur along plate boundaries or in the middle of a plate

• Faults from from plate movements

• Faults form when stress causes rocks to break.