1.1 Plate Tectonics Theory

• At convergent boundaries, plates collide, leading to subduction or mountain building
• Match the plate boundary type with its tectonic features:

  Convergent ↔️ Oceanic trenches, volcanoes

  Divergent ↔️ Mid-ocean ridges, rift valleys

  Transform ↔️ Fault lines, earthquakes
• New crust is created at transform boundaries.

  False
• Match the driving force with its primary boundary type:

  Convection Currents ↔️ Divergent boundaries

  Slab Pull ↔️ Convergent boundaries
• Slab pull is a key driving force at divergent boundaries.

  False
• What is an example of a transform boundary?

  San Andreas Fault
• Transform plate boundaries are associated with fault lines and earthquakes.
• Slab pull occurs at convergent boundaries due to the sinking of dense oceanic crust.
• What is the main composition of oceanic plates?

  Basalt
• What is a real-world example of a convergent boundary feature?

  Mariana Trench
• The Mariana Trench is an example of a convergent
• Order the processes associated with a convergent plate boundary:

  1️⃣ Plates move towards each other

  2️⃣ One plate subducts under another

  3️⃣ Compression occurs

  4️⃣ Volcanoes or mountain ranges form
• Match the driving force of plate movement with its description:

  Convection Currents ↔️ Heated mantle material rises and spreads

  Slab Pull ↔️ Weight of subducting plate drags
• Match the geological feature with the plate boundary type it is associated with:

  Oceanic trenches ↔️ Convergent

  Mid-ocean ridges ↔️ Divergent

  Fault lines ↔️ Transform
• The subduction process at convergent boundaries is driven by the difference in density
• How many main types of plate boundaries are there?

  Three
• Transform boundaries involve plates sliding past each other horizontally.


  True
• At divergent boundaries, plates move apart, creating new crust
• What is slab pull, and how does it drive plate movement?

  Weight of dense plate pulls
• At convergent boundaries, the dense oceanic crust sinks under the lighter continental crust due to slab pull.
• At divergent boundaries, plates move apart, creating mid-ocean ridges and rift valleys.
• What type of plate boundary creates new crust as plates move apart?

  Divergent
• What is the primary force driving convection currents in the mantle?

  Radioactive decay
• Match the plate boundary type with its geological features:

  Convergent ↔️ Oceanic trenches, volcanoes

  Divergent ↔️ Mid-ocean ridges, rift valleys

  Transform ↔️ Fault lines, earthquakes
• Order the steps of subduction at a convergent boundary:

  1️⃣ Dense oceanic crust sinks

  2️⃣ Slab pull drives plate movement

  3️⃣ Geological features form
• The San Andreas Fault is a transform boundary where the Pacific and North American plates slide past each other.


  True
• Which plate boundary is responsible for the San Andreas Fault?

  Transform
• What geological features are associated with a transform boundary?

  Fault lines, earthquakes
• Convection currents create circular currents that drag on overlying plates
• Continental plates are less dense than oceanic plates.


  True
• What geological features are created at divergent boundaries?

  Mid-ocean ridges, rift valleys
• What happens to plates at convergent boundaries?

  They collide
• Order the steps in the formation of a convection current:

  1️⃣ Mantle material is heated by Earth's core

  2️⃣ Heated material rises

  3️⃣ Material spreads and cools

  4️⃣ Circular currents are created
• What causes convection currents in the Earth's mantle?

  Radioactive decay
• What are examples of tectonic features created at convergent boundaries?

  Himalayas, Mariana Trench
• Match the plate boundary type with its associated example:

  Convergent ↔️ Himalayas

  Divergent ↔️ Mid-Atlantic Ridge

  Transform ↔️ San Andreas Fault
• Each type of plate boundary results in unique geological features.

  True
• Convection currents provide the initial push for plate movement at divergent boundaries.

  True
• Continental plates are less dense than oceanic plates due to their composition of granite.
• The Mid-Atlantic Ridge is a prime example of a divergent boundary where new oceanic crust is created.