Shield volcanoes
What do shield volcanoes look like?
They have large, wide, slopes.
What do divergent plates do?
They divide.
Magma is molten rock below earths surface. Lava is molten rock that erupts onto the surface.
How are shield volcanoes formed?
Repeated eruptions as the crust separates.
List one thing that happens at divergent boundaries
Rift valleys, volcanoes and earthquakes.
Tiny particles of pulverized volcanic rock and glass.
What is one example of a shield volcano?
Kilauea, Mauna Loa, Piton de la Fournaise and Erta Ale.
What layer of the earth does the plates move?
Lithosphere
What is convection?
Circulation of material caused by differences in temperature and density.
They are normally formed at? List 2.
Mid ocean ridges and plate boundaries.
Mid-Ocean ridges are at almost every divergent plate boundary. What is a mid-ocean ridge?
Mountain ranges in the middle of the ocean.
What is Viscosity?
Liquids resistance to flow.
What are sheild volcanoes made of?
Basaltic and andesitic lava flows.
List one of the places where a divergent boundary has created mountains, valleys or ridges.
Basin and Range, Great Rift Valley in Africa, Pacific rise and Mid Atlantic ridge.
What is ridge push?
The force that moves the lithosphere in opposite directions from the mid-ocean ridge.