6.4 - Changes in the Earth Flashcards
This includes: plate boundaries, movements of plates, fold mountains, volcanos, earthquakes (11 cards)
What natural disaster happens when a plate moves together
Fold mountains.
What are fold mountains?
Fold mountains are when rocks crumple and move upward when tectonic plates move against each other.
Explain what is plates moving together mean
Plates moving together is when a plate might slide under one another because of too much human activities like drilling and other things. This is called subduction. The plate that slid under the plate will then melt and join with the mantle. This is called a convergent boundary.
What are the 3 types of movements of plates?
Plates moving together, Plates moving away from each other, Plates sliding past one another
Explain what plates moving away from each other mean
As tectonic plates drift 4cm every year, some tectonic plates might be too thin and crack causing the magma to be exposed and become lava which then will eventually becomes a volcano. This is called a divergent boundary.
Explain what plates sliding against each other mean
All plates are always large and heavy. So, due to this they all have pressure and a lot of friction building up in them over the years. After a while, there will be too much pressure and this causes the plates to have violent movement with each other. This movement causes earthquakes.
What is the word to describe how strong an earthquake is?
The magnitude
What are the parts of a volcano -labeled on a diagram in notion-
The crater
The secondary vent
the layers of ash and lava
The main vent
The magma
The lava flow
the ash cloud.
What is a dormant/inactive volcano
It means it didn’t erupt in about 10 years and will probably not erupt again
What is an active volcano
It erupted recently and will probably erupt soon
What is an extinct volcano
It didn’t erupt more than 50-100 years and will not erupt again
