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9Sci Earth Science Revision 2021 Flashcards | StudBud
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9Sci Earth Science Revision 2021
9Sci Earth Science Revision 2021
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1
Where is the youngest rock found when plates diverge in seafloor spreading?
All of the rock is the same age
Furthest away from where the plates are separating
The core of the Earth
Where the plates are seperating
2
How do ocean trenches form?
Subduction of an oceanic and contenential crust
Subduction causes volcanoes to puch up
Magma swells up causing oceanic plates to move apart
Though tsunamis that arise from earthquakes
3
What location has the most volcanoes on Earth?
Pacific Ring of Fire
On mountains
Underwater
Venus
4
What boundary is this?
Convergent
Transform
Divergent
Subduction
5
What is the process that drives seafloor spreading?
Seafloor spreading
Subduction
Conduction
Convection currents
6
What
process
is happening along the Ring of Fire to create so many volcanoes?
Continental drift
Subduction
Seafloor spreading
Transform
7
What evidence supports Wegners Theory of Continental Drift?
Marine fossils found in the Himalayan mountains
All of the above
The shape of the continents (jigsaw)
New rock formation at the site of seafloor spreading from convection curren
8
What boundary is this?
Divergent
Convergent
Subduction
Transform
9
What plate boundaries are located at the Ring of Fire to create so many volcanoes?
Divergent
Convergent
Continental drift
Transform
10
Primary seismic waves (P waves):
Move in an up and down motion
Travel fast through solids, liquids and gases
Move side-to-side
Only travel through solids and are more destructive
11
Why is it so dangerous to live on the Ring of Fire?
All of the above
Volcanoes
Earthquakes
Tsunami
12
Eutrophication is when there is a lack of oxygen from increased fertilisers in the water system. It results in: (pick 3)
Lower oxygen levels in the water
More apex predators
Algal blooms (growth)
Decreased fish levels
13
How do ocean ridges form?
Though tsunamis that arise from earthquakes
Subduction causes volcanoes to puch up
Magma swells up causing oceanic plates to diverge ( seafloor spreading)
Subduction of an oceanic and contenential crust
14
What kind of plate movement causes mountains?
Transform
Subduction
Convergent
Divergent
15
What boundary is this?
Subduction
Transform
Divergent
Convergent
16
Where is the oldest rock found when plates diverge in seafloor spreading?
Furthest away from where the plates are separating
All of the rock is the same age
The core of the Earth
Where the plates are seperating
17
What is the
process
here called?
Convergent
Subduction
Seafloor spreading
Transform
18
What kind of plate movement causes earthquakes?
Convergent
Transform
Subduction
Divergent
19
Secondary seismic waves (S waves):
Only travel through solids and are more destructive
Move in an up and down motion
Travel fast through solids, liquids and gases
Move side-to-side
