PHYS203 EXAM 2 NJIT-Questions 2025/2026 with
100% Correct Solutions
Molten rock below earth's surface is...
Magma
Molten rock on earth's surface is...
Lava
The violence of volcanic eruptions is mainly controlled by...
The viscosity of the magma
High viscosity of magma
More violent eruptions (Mount St. Helens)
Less viscosity of magma
Less violent eruptions (Hawaii over a hot spot)
Composition and temperature control...
Viscosity
Lower temperature gives...
Higher silica (SiO2) content gives...
Higher viscosity
Basaltic lava has low viscosity due to having...
Less than 53% silica and magma temperature of 1100-1250 Celsius
, Rhyolitic lava has high viscosity due to having...
More than 68% of silica and magma temperature of 700-850 Celsius
Volcanic gases, such as CO2, escape more...
Easily from low viscosity magma
Majority of active volcanoes are located at...
Convergent plate boundaries
A shield volcano is...
Gentle slopes that are formed by longer distance of low viscosity lava flow
A strato volcano is...
Cone shaped with steep slopes that are formed by shorter distance of high viscosity lava flow
Volcanic debris carried by prevailing winds (tephra and gasses) and flowing on the ground
(lahar) affect...
Areas hundreds of kilometers away from volcanic eruptions.
A large crater that forms when a volcano collapses into a shallow empty magma chamber
below the volcano is a...
Caldera
The tallest mountain peaks are all in the...
Himalayas
The continental crust is thickest under...
100% Correct Solutions
Molten rock below earth's surface is...
Magma
Molten rock on earth's surface is...
Lava
The violence of volcanic eruptions is mainly controlled by...
The viscosity of the magma
High viscosity of magma
More violent eruptions (Mount St. Helens)
Less viscosity of magma
Less violent eruptions (Hawaii over a hot spot)
Composition and temperature control...
Viscosity
Lower temperature gives...
Higher silica (SiO2) content gives...
Higher viscosity
Basaltic lava has low viscosity due to having...
Less than 53% silica and magma temperature of 1100-1250 Celsius
, Rhyolitic lava has high viscosity due to having...
More than 68% of silica and magma temperature of 700-850 Celsius
Volcanic gases, such as CO2, escape more...
Easily from low viscosity magma
Majority of active volcanoes are located at...
Convergent plate boundaries
A shield volcano is...
Gentle slopes that are formed by longer distance of low viscosity lava flow
A strato volcano is...
Cone shaped with steep slopes that are formed by shorter distance of high viscosity lava flow
Volcanic debris carried by prevailing winds (tephra and gasses) and flowing on the ground
(lahar) affect...
Areas hundreds of kilometers away from volcanic eruptions.
A large crater that forms when a volcano collapses into a shallow empty magma chamber
below the volcano is a...
Caldera
The tallest mountain peaks are all in the...
Himalayas
The continental crust is thickest under...