Yr9 Science Revision - Earth and Space

What is the Lithosphere?

What is the Asthenosphere

What are the 2 theories of how the tectonic plates move?

Types of tectonic plate movements

Convection Currents Theory

Gravity Theory

What did Alfred Wegener discover about the tectonic plates?

What was Alfred Wegener's theory? (Continental Drift)

What was the large landmass called before the continents split apart?

What were Wegener's 2 observations

What did Harry Hess discover?

What is the Great Global Rift System?

Where are rifts found?

Seafloor Spreading

Subduction

What does subduction occur at
oceanic - continental or oceanic - oceanic

Where can you find the older oceanic crust from seafloor spreading?

Evidence of Seafloor Spreading

Diverging Plate Boundaries

What do Diverging Plate Boundaries form? Give Example

Converging Plate Boundaries

3 types of converging plate boundaries

Density - Which is denser oceanic or continental?

Converging boundaries
Oceanic - Continental

converging boundaries
continental - continental

Converging boundaries
Oceanic - Oceanic

Transform boundaries

fault lines

Divergent plate boundaries
continental - continental

divergent plate boundaries
Oceanic - Oceanic

Slab Pull

Ridge Push

What is a volcano?

Types of Material that comes out of a volcano

Where do volcanos form

Effusive eruption

Explosive eruption

Types of volcano eruptions

Pyroclastic flow

How do volcanoes form at diverging plate boundaries

What volcanoes form at converging plate boundaries

What is a hot spot

What is sonar calculations

Hotspots on oceanic crust

Types of volcanos

what are shield volcanos?

What are Cone volcanoes?

What are Fissure volcanoes?

What are caldera volcanos?

Classifications of volcanoes

Active Volcanoes?

Erupting volcanoes?

Dormant volcanoes?

Extinct volcanoes?