Hawaii Volcanoes

Which process commonly builds Hawaiian shield volcanoes?

• Sediment deposited only by rivers
• Wind piling up snow
• Movement of glacial ice
• Many flows of relatively fluid lava

Why are valleys often more deeply developed on older Hawaiian islands?

• Erosion has acted on them for longer
• Their rocks contain no minerals
• They have never experienced rainfall
• The ocean cannot reach them

How did repeated eruptions help form the Hawaiian Islands?

• They moved every island onto the mainland
• They stopped ocean currents
• They built volcanic mountains upward from the seafloor
• They deposited continental ice

What is lava?

• Solid rock deep in the mantle
• A cloud of rainwater
• Salt deposited by tides
• Molten rock at Earth’s surface

What is magma?

• Molten rock below Earth’s surface
• Ocean water heated by sunlight
• Frozen volcanic ash
• Loose beach sand

What shape is typical of a shield volcano?

• A tall rectangular cliff
• A narrow ice column
• A flat-bottomed canyon
• Broad with gentle slopes