Landforms Flashcards
Divergent plate boundaries
Divergent boundaries are places where two plates of the lithosphere move away from each other
- Usually located on the ocean floor’s
- magma moves upward between the plates creating new rock
- volcanic activity is common (the mid Atlantic ridge is an example)
Transform plate boundary
- A place for side-by-side plates grind past each other
- this creates friction which often causes an earthquake
- the San Andreas Fault near San Francisco is a transform fault
Convergent plate boundary
A place where two plates come together
- the constant pressure against each other cause of the edges of the plates to compress and push up
- they become fold mountains
- when one underwater plate and continental plate collide the ocean plate is forced under the continental plate creating a trench
- the pressure along the trench create earthquakes
- magna for book from below burst to the surface three to broken layers near by creating a volcano
What is a volcano
A volcano is a mountain that forms when magma reaches the surface of the earth
- magma rises because it is less dense than the solid rock around
- Pressure builds up, eruptions occur
- eruptions can cause lateral blasts, lava flows, hot ash flows, mudslides, avalanches, following ash and floods
- an erupting volcano can trigger Sue Nami’s, flash floods, earthquakes, mudflows, and rockfalls
More about volcanoes
A volcano is an opening or rupture and planet surface or Crust
- it allows hot magma and gases to escape
- the word volcano is derived from the name of vulcano island off Sicily
- that was named after Vulcan the Roman god of fire
Shield volcano
- Quiet eruptions, producing runny lava
- A dome shape mountain
Cinder volcano
- Ash and cinders are spewed out
- they only have explosive, loud eruptions
Compisit volcano
- Alternating quiet and explosive
- alternating lava and Ash layers
- Tallest of all volcanoes
The dangers of earthquakes
The ring of fire is the earthquake zone and stringy ball Cano’s that surround the Pacific Ocean
- it is where pressure builds and also where plates meet
- The epicenter is a place on the earth’s surface directly above where the main shock occurs
- after the first shock there can be a series of smaller shocks called aftershocks
- earthquakes can trigger Sue Nami’s
- Sunol me is formed when earthquake shakes the ground mini
- they can move it of speeds of up to 800 km/h
- shock tremors race through the water out word in a circular pattern
Parts of the volcano
The vet is the opening from which lava flows. Just ash and rock particles can be thrown out of the vent
- the crater is a funnel shaped pit at the top of the volcano it is formed when just ash and Brock are thrown out of the vent
- volcanic cone is the pile of lava ash dust and rock particles that surround the vet they can be found in many different sizes and shapes
Mountain
There is one on every continent there are several different types two types are the fold and volcano they are formed by a large movement in the earths crust
Planes
Planting usually at a low elevation. They are usually very flat but can have gently rolling hills. They are great for agriculture. Some were formed at the bottom of an ocean
Valleys
It is the area of land between two areas of Hylande. It is usually low. They often have a river or stream running through them. I V-shaped valley is created when rivers run over the surface and carry way materials. Are you shaved valley is formed when rock runs over the surface and carried away materials
Shield
Shields are layers of old rock that make up the continents they are sometimes exposed and sometimes covered in vegetation
Platoz
Mainly large areas of flat high elevated land. Found in mountain regions and sometimes between two mountains
Landform
Natural features that make up the earths surface. Sometimes disasters on the news reminders of how landforms affect people. Earthquakes can trigger much sides of landslides and Sue Nami’s. Earthquake is the release of energy through the Earth’s crust due to changes taking place beneath it
Check yourselves against volcanoes
In volcanic irruption leave the area immediately
Protecting ourselves in earthquakes
When an earthquake occurs get to an open field with no trees or buildings as fast as possible
What is an earthquake
- Sudden movement in the earths crust which is the upper mantle of the earth
- Pressure builds a long deep crack or fault in the earths crust. The rock on one side of the fault pushes against the rock on the other side of the fault
- All of that release energy causes the ground to undelete for miles
- the impact when the two sides of the fault come together make the ground shutter
- earthquakes caused a tremendous amount of devastation due to the great upheaval. There is also debris everywhere
