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Flashcards in 6.1 Deck (18):
1

Molten rock.

Magma

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Magma that flows onto Earth's surface.

Lava

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Areas of Earth's surface through which magma and volcanic gases pass.

Volcano

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Dust-sized particles from a volcano.

Ash

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A body of molten rock deep underground that feeds a volcano.

Magma Chamber

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Cracks in the Earth's crust.

Vents

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Rock that can float in water.

Pumice

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Forms when magma is blasted into the air and hardens.

Pyroclastic Material

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Cool, stiff lava that oozes from a volcano and forms jumbled heaps of sharp-edged chunks.

Blocky Lava

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Lava that forms underwater in rounded lumps.

Pillow Lava

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Lava that flows slowly and has a glassy surface and rounded wrinkles.

Pahoehoe Lava

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Lava that pours out quickly and forms a brittle crust.

Aa Lava

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Large blobs of magma that harden in the air.

Volcanic Bombs

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Pebblelike bits of magma that harden before they hit the ground.

Lapilli

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Tiny, glasslike slivers.

Volcanic Ash

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Pieces of solid rock erupted from a volcano.

Volcanic Blocks

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A dangerous type of volcanic flow.

Pyroclastic Material

18

The thickness of lava.

Viscosity