Earth layers
What are the earth layers?
conential crust
Oceanic crust
Lithosphere
Asthenosphere
Mantle
Inner core
Outer core
What does SCUBA stand for?
Self Contained Underwater Breathing.
How are sediments formed?
The sediments are formed when weathering and erosion break down a rock into loose material in a source area.
What causes plate tectonics?
Convection currents in the molten rock in earth’s mantle below the crust
What are 3 types of volcanoes?
Cinder cones or spatter cones
Composite volcanoes
Shield volcanoes
What’s the outer layer of the earth?
The crust
What is the most common cause of diver injuries?
Diver carelessness
What is a hydrogenous sediment?
Manganese nodules
When plates move apart it's called
Divergent
What is magma?
Magma is hot liquid rock found deep below earth’s surface.
Starts at 5,150km from the earth’s surface and extends to the center of the earth.
How long should you wait to fly after your last dive?
24 hours
methods scientists used to study sediments
Clamshell samplers, piston corers, drilling ships.
When plates move towards each other it's called
Convergent
where in the world are three quarters of the world’s active volcanoes found?
Under water
What materials make up the inner core?
Primarily iron at 80% and nickel, along with trace amounts of heavy materials
SCUBA divers are at risk to a number of pressure related hazards. There is one collective term used to describe all these maladies. What is that term?
Barotrauma
What is the largest particle on sediments?
Gravel
When plates slide past each other their called:
Transform
What is volcano laca?
Magma bursts through onto earth’s surface as a bright orange liquid.
How deep is the Earth’s crust?
What should you never do while SCUBA diving?
hold your breath
what is deposition?
Dropping sediments
What drives plate movement?
Convection currents
What is a hot spot?
Occurs when magma breaks through the thinner parts of earth’s crust