Volcanoes
A crack in Earth’s crust where slabs of rock can slip past, move away from, or push against each other
Fault
Melted rock that flows from a volcano onto Earth’s surface
Lava
The shaking of the ground usually caused by the movement of Earth’s crust or by a volcano
Earthquake
A large section of Earth’s crust and outer mantle that slowly moves
A plate
Melted rock beneath Earth’s surface
Magma
Earth’s three main layers
Crust, mantle and core
The surface of the Earth is always
Changing
The slow movement of Earth’s plates can push and pull on the rock in the crust, which leads to these
Faults
A mountain or hill on Earth’s crust through which lava, gas, and ashes can erupt
Volcano
Three directions in which plates can move
Slide past each other, move away from each other, and push against each other
A seismograph measures the intensity of
Earthquakes
These can change the course of rivers and land, damage buildings, bridges, roads, and other structures
Earthquakes
Many eruptions include globs of molten rocks that cool in mid air. These hot rocks are called
Volcanic bombs
Small cone volcano with steep sides
Cinder Cone Volcano
Made of layers of lava sandwiched between layers of ashes and rock pieces.
Composite Volcano
Volcanos can create new
Landforms
Eruptions from these volcanos are mostly ashes and larger pieces of rock.
Cinder Cone Volcano
Cone-shaped, but is much taller than cinder cones
Composite Volcano
This from volcanos can eventually become good soil for growing crops
Ash
Eruptions are mostly liquid lava that spurts in the air of flows out gently
Shield Volcano
These can set off landslides as their powerful explosions loosen rock from the side of a mountain
Volcanic eruptions
Rapid movement of rock, soil, and other material down a hill or mountain
Landslide
Earth’s layer where earthquakes and volcanoes occur
Crust
This is a wide volcano with gently sloping sides
Shield Volcano
This island chain was created from volcanic eruptions
Hawaii