6 Sci Test 5 Ch 3A
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| active | a volcano that has erupted recently or is considered likely to erupt in the near future
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| caldera | a huge, bowl-shaped depression formed when an empty magma chamber collapses after a volcanic eruption
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| chemical weathering | natural acids slowly eat into a rock and break it apart
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| cinder cone volcano | a volcano formed when eruptions composed mostly of tephra build up cone-shaped mountains
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| composite volcano | a volcano formed when alternating layers of fluid lava & tephra build up a steep symmetrical mountain, often with a small crater at the top
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| core | the innermost region of the earth
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| crater | a depression at the top of a volcano
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| crust | the outermost layer of the earth
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| dormant | a volcano that erupted many years ago and although now inactive, may erupt again
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| earthquake | any trembling or shaking of the earth's crust
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| epicenter | the place at ground level that is directly above the focus of an earthquake
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| extinct | a volcano that has not erupted in recorded history or is unlikely ever to erupt again
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| fault | the break that appears at the boundary between two moving masses of rock
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| focus | the point underground where an earthquake begins
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| fumaroles | holes or cracks that serve as escape vents for underground gases
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| geologist | a scientist who studies the structure of the earth
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| geology | the study of the earth & its structure
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| Hawaiian eruption | fluid lava surges from the vent like water from a fountain
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| lapilli | fragments of tephra that are smaller than bombs and blocks but larger than volcanic ash; means "little stones"
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| lava | molten rock after it reaches the earth's surface
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| magma | melted rock underground
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| magma chamber | a large reservoir located a few miles beneath the earth's surface containing magma
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| magnitude | the strength of an earthquake
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| mantle | the middle layer of the earth
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| mid-oceanic ridges | an underwater mountain range in the ocean where plates of the earth's crust are moving away from each other
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| Moho | the boundary between the crust & the mantle
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| physical weathering | physical forces such as flowing water, ice, or windblown sand break down the rock
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| Plinian eruption | hot clouds of gas and dust are expelled high into the air, usually quite violently
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| Richter scale | the scale used to measure the strength of an earthquake
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| Ring of Fire | a zone of volcanoes that encircles the edge of the Pacific Ocean
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| seismic belts | the regions of the earth where most of the world's earthquakes occur
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| seismology | the study of earthquakes
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| shield volcano | a volcano formed when large amounts of fluid, runny lava gradually build up a dome-shaped mountain
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| Strombolian eruption | globs of hot lava are flung into the air where they harden into volcanic bombs in a series of noisy but mild eruptions
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| tephra | fragments of volcanic rock that form when thick magma explodes into pieces as it leaves the volcano
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| tsunami | an enormous wave that can be caused by an earthquake
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| vent | an opening in the ground through which a volcano erupts
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| volcanic ash | the smallest fragments of tephra: resembles dust or fine sand
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| weathering | a process that causes rocks to gradually break and crumble into smaller pieces
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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