Smk green 2do partial

What is magma composed of?

• Only molten rock and minerals

• Dissolved gases and minerals only

• Molten rock, mineral particles, and dissolved gases

• Hardened lava and rock fragments

What happens to magma during a volcanic eruption when it reaches the surface?

• It immediately becomes a volcanic cone

• The gases separate from the liquid, expelling material into the air

• It forms a new magma chamber

• It creates a permanent crater

Which part of a volcano serves as the storage area for molten rock beneath the surface?

• The volcanic cone

• The crater

• The eruption column

• The magma chamber

What is the difference between magma and lava?

• Magma is hot while lava is cold

• Lava is magma that has expelled its gases

• They are exactly the same thing

• Lava is found underground while magma is on the surface

What is the eruption column composed of?

• Only volcanic ash

• Hardened lava and minerals

• Expelled gases, volcanic ash, and rock particles

• Pure molten rock

What process in Earth's mantle is responsible for plate movement in the lithosphere?

• Subduction

• Convection

• Rifting

• Faulting

When oceanic and continental plates collide, what typically occurs?

• Both plates sink into the mantle

• Mountain ranges form immediately

• The oceanic plate subducts beneath the continental plate

• A transform fault develops

Which type of plate boundary is characterized by plates moving horizontally past each other?

• Convergent boundary

• Divergent boundary

• Transform boundary

• Subduction boundary

What geological feature forms when two continental plates collide?

• Oceanic trenches

• Rift valleys

• Transform faults

• Mountain ranges

At divergent boundaries, what fills the space created when plates move apart?

• Sedimentary rocks

• Molten rock from the mantle

• Ocean water

• Continental crust