SCUBA
What does SCUBA mean?
Self-contained underwater breathing apparatus
What is magma?
A molten mixture of rock-forming substances, gases, and water from the mantle.
What is Pangaea?
The supercontinent that existed millions of years ago.
What are the three major layers of the earth?
Crust, mantle and core.
When does weathering occur?
When rock is exposed at the surface.
What is a ¨squeeze¨?
A pressure imbalance that pushes tissues into an air space.
What is the ring of fire?
A major belt of volcanoes.
What is continental drift?
Hypothesis that the earths continents have moved over geologic time relative to each other.
What elements form the composition of the mantle?
Silicon, oxygen, iron, magnesium.
What is erosion?
The transport of sediments.
When selecting scuba equipment, what are the three most important factors?
Suitability, fit, and comfort.
What is a volcanic belt?
A volcanic belt forms along the boundaries of earths plates.
What is a convergent boundary?
The boundary formed by the collision of two lithospheric plates. One plate eventually slides beneath the other.
What determines the separation of earths layers?
Density.
What are some ways sediments can be transported?
Running water, glaciers, wind.
How do you prevent nitrogen narcosis?
Avoiding deep dives.
What is a hotspot?
An area where material form deep within earths mantle rises to the crust and melts to form magma.
What is a divergent boundary?
The boundary between two tectonic plates that are moving away from each other.
What are the two types of crust?
Continental and oceanic.
What is the result of a glacier?
Results in deposits that are composed of all sizes.
How do you avoid decompression sickness?
By not exceeding established depth and time limits when diving and then surfacing.
What is a vent?
Molten rock and gas leave the volcano through and opening.
What is a transform boundary?
The boundary between tectonic plates that are sliding past each other horizontally.
Which layers floats on which other layer?
Lithosphere on Asthenosphere.
What is lithification?
The process by which unconsolidated sediments are transformed into solid sedimentary rock.