Topic 4 Lesson 4 Quiz

What is magma?

• Solidified lava

• Molten mixture of rock-forming substances, gases, and water

• A type of rock formed by volcanoes

• A type of gas released during eruptions

What is the name for magma once it reaches Earth's surface?

• Lava

• Ash

• Seamount

• Crater

What is the main process that causes magma to rise toward the surface during subduction?

• Heat from the Earth's core

• Water trapped in the sinking plate mixes with the mantle

• Earthquakes cause pressure to build

• Plates moving apart at divergent boundaries

Which of the following is most commonly found at divergent plate boundaries?

• Earthquakes

• Volcanic island arcs

• Oceanic volcanoes

• Subduction zones

Where are volcanoes most likely to form?

• At mid-ocean ridges

• At plate boundaries

• At the poles

• In the middle of tectonic plates

What type of volcano forms at a divergent boundary on land?

• Shield volcano

• Stratovolcano

• Hot spot volcano

• Volcanic cone

What is a volcanic island arc?

• A large volcano that is located at the center of a continent

• A chain of islands formed by volcanoes along a subduction zone

• A single volcano in an oceanic region

• A type of volcano found only on land

How are volcanoes created at hot spots?

• By the collision of two tectonic plates

• By lava rising through plate cracks at divergent boundaries

• By mantle plumes beneath stationary plates

• By earthquakes beneath the surface

Which location is an example of a hot spot volcano?

• Mount St. Helens

• Hawaii

• Mount Vesuvius

• Mount Kilimanjaro

What does a magma chamber do?

• Creates earthquakes

• Collects magma before an eruption

• Cools the magma into solid rock

• Causes the volcano to explode