Grade 9 / Science / Abeka / Chapter 8
66 Questions
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The study of the earth
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Science of the physical creation grade 9 chapter 8 practice test
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- 2.
Volcanoes which pour out large quantities of highly fluid lava in rather mild eruptions produce a broad, gently sloping volcano
- 3.
Earth's outer layer of rock; portion we are most familiar with
- 4.
The middle layer of the earth
- 5.
Central part of the earth
- 6.
Any trembling or shaking of the earth's crust; sudden movement of rock masses along a fault
- 7.
The point on the earth's surface directly above the focus of an earthquake
- 8.
The study of earthquakes
- 9.
The point at which an earthquake begins
- 10.
A volcano which has erupted many years ago, but is now inactive
- 11.
An arch like structure
- 12.
The most famous scale used to measure earthquake strength
- 13.
If a volcano has erupted within the past 50 years
- 14.
Slow convection currents in the plastic rock of the upper mantle
- 15.
Trough like structure
- 16.
Horizontal sheetlike mass of igneous rock
- 17.
Occurs when rocks along one side of a fault sink vertically
- 18.
Molten rock that may lie 3-4 miles beneath the surface
- 19.
The molten rock that flows from volcanoes
- 20.
Primary waves; consist of a rhythmic push-pull motion in the direction of wave travel such as when spiring is alternately pushed pulled along its length
- 21.
The study of volcano-related phenomena
- 22.
The most abundant element in the earth's crust; makes up 50% of the earth's crust by weight
- 23.
"float" like rafts on the plastic rock of the upper mantle
- 24.
Marks the lower boundary of the crust
- 25.
Formed when molten rock erupts from a hole in the earth's crust
- 26.
Appear to be formed when molten rock is forced beneath an overflying rock layer, forcing the layer upward into a blister like dome
- 27.
Weak earthquakes
- 28.
Elastic strip along a strike-slip fault in western California
- 29.
When P and S waves reach the earth's surface, they generate a third type of seismic wave called a __________
- 30.
Seismologists record and study the vibrations caused by earthquakes using an instrument called a ____________
- 31.
The central feature of a volcano through which gases, has, and rock are ejected
- 32.
A volcano which will probably not erupt again
- 33.
The most important belt; a narrow zone of active volcanoes that nearly encircles the Pacific Ocean Basin
- 34.
Any substance which is emitted by an active volcano
- 35.
Lava that hardens to form a smooth or ropy surface
- 36.
Occurs when rocks along one side of a fault move horizontally along the fault
- 37.
Smaller earthquakes or tremors following an earthquake at frequent intervals for days or even months, gradually decreasing in intensity
- 38.
When a layer of rock breaks under the strain of the forces upon it and moves
- 39.
Formed by the bending or buckling of rocks under great force
- 40.
There are twelve degrees of intensity as shown in the accompanying table
- 41.
Volcanoes made of erupted volcanic ash and rock fragments
- 42.
Consists of pyroclastic particles less than 4 mm
- 43.
Ejecta that are larger than volcanic dust particles but less than 32 mm in diameter
- 44.
"growing cloud" consists of a superheated incandescent cloud of gas and volcanic ash that travels swiftly down the volcanic slope as an avalanche
- 45.
The portion of the crust underlying the continents; a rock chiefly composed of silica and alumina
- 46.
The surest under the oceans; a denser rock that contains silica and significant amounts of magnesium
- 47.
Marks the lower boundary of the mantle and lies roughly 2900 km beneath the surface
- 48.
Pyroclastic ejecta which are formed when lava is thrown high into the air in a liquid or semiliquid state and hardens into rock before it hits the ground
- 49.
A vertical sheetlike mass of igneous rock
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Mar 21, 2022Quiz Edited by
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Mar 10, 2015Quiz Created by
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