3rd Quarter Review Test - Science 9

Opening in the earth's crust from which lava, ash, and hot gases are ejected during an eruption.

• Volcano
• Hurricane
• Earthquake
• Tornado

What is a volcanic eruption?

• A volcanic eruption is the release of molten rock, ash, and gases from a volcano onto the Earth's surface.
• A volcanic eruption is a controlled explosion conducted by scientists.
• A volcanic eruption is caused by the movement of tectonic plates.
• A volcanic eruption is the result of excessive rainfall in a region.

This is the resistance of a material to flow.

• Density
• Conductivity
• Friction
• Viscosity

What is characterized by a plinian eruption?

• Small non-explosive eruption with no ash
• Large explosive eruption with a tall column of ash and pumice
• Moderate eruption with lava flows
• Underwater eruption with steam explosions

What is a shield volcano?

• A shield volcano is a type of volcano formed by the accumulation of ash and cinders.
• A shield volcano is a type of volcano usually built almost entirely of fluid lava flows.
• A shield volcano is a type of volcano that erupts explosively with pyroclastic flows.
• A shield volcano is a type of volcano characterized by its steep, conical shape.

Which of the following describes a cinder cone volcano?

• A cinder cone volcano is a volcano with a wide crater at the summit
• A cinder cone volcano is a dome-shaped volcano made of layers of hardened lava flows
• A cinder cone volcano is a steep-sided, conical volcano made up of volcanic ash, cinders, and rocks ejected during explosive eruptions.
• A cinder cone volcano is a flat, shield-shaped volcano formed by slow-flowing lava

Which of the following describes a composite volcano?

• A composite volcano is a low, flat volcano with gentle slopes
• A composite volcano is a volcano that only erupts steam
• A composite volcano is a tall, steep-sided volcano composed of alternating layers of solidified lava flows, volcanic ash, and other volcanic debris.
• A composite volcano is a volcano made entirely of ice

Which of the following describes a phreatic volcanic eruption?

• An eruption caused by steam-driven explosions due to water-magma interaction.
• An eruption caused by meteor impact
• An eruption caused by tectonic plate movement
• An eruption caused by lava flows and ash expulsion

Which type of volcanic eruption is very explosive?

• Cinder cone volcanoes
• Shield volcanoes
• Dormant volcanoes
• Stratovolcanoes

Which of the following describes why a volcano erupts?

• Pressure from molten rock beneath the Earth's surface
• Global warming
• Alien interference
• Volcanoes are angry