All About Volcanoes

Multiple Choice

Molten rock above the ground is called

• Magma

• Lava

Multiple Choice

Where do volcanoes NOT occur?

• Convergent plate boundaries

• Divergent plate boundaries

• Transform plate boundaries

• Hot Spots

Multiple Choice

The United States is part of the Ring of fire

• True

• False

Multiple Select

What 2 things determine how explosive a volcanic eruption is?

• Silica Content

• Sulfur Content

• Dissolved Gases

• Plate boundary

Multiple Choice

Magma that reaches the surface is called:

• Vent
• Hot spot
• Lava
• Cinders

Multiple Choice

Explosive eruption that hurls ash, gases, cinders, and bombs from the main vent.

• Volcano bomb
• Geyser
• Geothermal energy
• Pyroclastic flow

Multiple Choice

Magma's resistance to flow, or how thick it is, is called:

• silica
• viscosity
• hot spot
• caldera

Multiple Choice

Where are volcanoes most likely to form?

• along plate boundaries

• near the center of continents

• near water

• on the moon

Multiple Choice

An area where material from deep within Earth's mantle rises through the crust and melts to form magma.

• hot spot

• rift zone

• hot soup

• hot mamma

Multiple Choice

Shield volcanoes form at _________ plate boundaries while ______________ volcanoes form at destructive plate boundaries

• constructive, composite

• destructive, composite

• composite, constructive

• composite, destructive

Multiple Choice

What is a volcano?

• A weak spot in Earth’s crust where magma can come to the surface.

• A mix of rocks, minerals, gases, and water from the mantle.

• Hot semifluid rock that becomes solid rock as it cools off.

• A special kind of mountain.

Multiple Choice

What is magma?

• Hot semifluid rock that becomes solid rock as it cools off.

• A mix of rocks, minerals, gases, and water from the mantle.

• A weak spot in Earth’s crust where magma can come to the surface.

• Hardened rock.

Multiple Choice

What is lava?

• A weak spot in Earth’s crust where magma can come to the surface.

• A mix of rocks, minerals, gases, and water from the mantle.

• Hot semifluid rock that becomes solid rock as it cools off.

• A really hot part of the mantle.

Multiple Choice

Where do volcanoes typically form?

• At plate boundaries.

• In the middle of tectonic plates.

Multiple Choice

What is an explosive eruption?

• When trapped gases build up pressure until they explode with incredible force.

• When magma flows easily and erupts quietly with gases bubbling out gently and lava oozing out quietly.

Multiple Choice

What is the name that scientists gave to the area around the pacific ocean where most of the volcanoes in the world exist?

• The Ring of Fire

• The Fire Ring

• The Ring of Volcanoes

• The Volcano Ring

Multiple Choice

A boundary on Earth's crust where two plates collide

• Convergent boundary
• Divergent boundary
• Transform boundary
• Indirect boundary

Multiple Choice

A plate boundary where the plates divide

• Indirect boundary
• Transform boundary
• Convergent boundary
• Divergent boundary

Multiple Choice

Which theory helped scientists understand how and where volcanoes erupt?

• Theory of Plate Tectonics

• Theory or Relativity

• Theory of the Rock Cycle

Multiple Choice

The Earth's crust is broken into pieces called

• glass

• rocks

• plates

• lava

Multiple Choice

Where is magma formed?

• In the Earth's core

• On the Earth's surface

• In the Earth's mantle

Multiple Choice

What provides the force that causes magma to erupt to the surface?

• the silica in the magma
• dissolved gases trapped in the magma
• gravity in the lithosphere
• the density of the magma

Multiple Choice

What is the principal ingredient to all types of magma?

• Iron
• Magnesium
• Silica
• Water