Volcanoes, Eruptions, Stars & Constellations

What are the three main types of volcanoes?

• Fissure vents

• Mud volcanoes

• Lava domes

• Shield volcanoes, stratovolcanoes, cinder cone volcanoes

Define a shield volcano and give an example.

• Mount St. Helens in Washington is a shield volcano.

• Kilauea in Hawaii is a stratovolcano.

• Mauna Loa in Hawaii is an example of a shield volcano.

• Mount Fuji in Japan is an example of a shield volcano.

What type of eruption is characterized by explosive activity?

• Plinian eruption

• Strombolian eruption

• Hawaiian eruption

• Fissure eruption

Name a famous stratovolcano and its location.

• Kilimanjaro, Tanzania

• Mauna Kea, Hawaii

• Mount St. Helens, Washington, USA

• Mount Fuji, Japan

What is the difference between a dormant and an active volcano?

• A dormant volcano erupts frequently; an active volcano is silent for centuries.

• A dormant volcano is inactive but may erupt again; an active volcano is currently erupting or has erupted recently.

• A dormant volcano is always extinct; an active volcano is never dormant.

• A dormant volcano is one that has erupted in the past year; an active volcano has not erupted for decades.

What is a lava dome?

• A lava dome is a flat, shield-like structure formed by basalt lava.

• A lava dome is a mound-shaped volcanic feature formed by the slow extrusion of viscous lava.

• A lava dome is a large crater formed by the collapse of a volcano.

• A lava dome is a type of explosive volcanic eruption.

Describe the characteristics of a cinder cone volcano.

• Cinder cone volcanoes are primarily composed of solid rock and do not erupt.

• Cinder cone volcanoes have multiple vents and erupt gently.

• Cinder cone volcanoes are flat and wide, formed from lava flows.

• Cinder cone volcanoes are steep, conical, formed from volcanic debris, have a single vent, and erupt explosively.

What is the primary gas released during a volcanic eruption?

• Sulfur dioxide

• Carbon dioxide

• Nitrogen gas

• Water vapor

How do constellations help in navigation?

• Constellations help in navigation by providing reference points to determine direction and position.

• Constellations provide weather forecasts for sailors.

• Constellations are used to measure time accurately.

• Constellations are primarily used for agricultural planning.

Name the largest constellation in the night sky.

• Cassiopeia

• Hydra

• Scorpius

• Orion