[問題]GWD7-Q22~Q25

[bugubugu]

Q22 to Q25:

Earth’s surface consists of rigid
plates that are constantly shifting and
jostling one another. Plate movements
Line are the surface expressions of motions
(5) in the mantle—the thick shell of rock
that lies between Earth’s crust and its
metallic core. Although the hot rock of
the mantle is a solid, under the tre-
mendous pressure of the crust and
(10) overlying rock of the mantle, it flows like
a viscous liquid. The mantle’s motions,
analogous to those in a pot of boiling
water, cool the mantle by carrying hot
material to the surface and returning
(15) cooler material to the depths. When
the edge of one plate bends under
another and its cooler material is con-
sumed in the mantle, volcanic activity
occurs as molten lava rises from the
(20) downgoing plate and erupts through the
overlying one.
Most volcanoes occur at plate
boundaries. However, certain “mis-
placed” volcanoes far from plate
(25) edges result from a second, indepen-
dent mechanism that cools the deep
interior of Earth. Because of its prox-
imity to Earth’s core, the rock at the
base of the mantle is much hotter than
(30) rock in the upper mantle. The hotter the
mantle rock is, the less it resists flow-
ing. Reservoirs of this hot rock collect
in the base of the mantle. When a
reservoir is sufficiently large, a sphere
(35) of this hot rock forces its way up
through the upper mantle to Earth’s
surface, creating a broad bulge in the
topography. The “mantle plume” thus
formed, once established, continues to
(40) channel hot material from the mantle
base until the reservoir is emptied.
The surface mark of an established
plume is a hot spot—an isolated
region of volcanoes and uplifted terrain
(45) located far from the edge of a surface
plate. Because the source of a hot
spot remains fixed while a surface
plate moves over it, over a long period
of time an active plume creates a chain
(50) of volcanoes or volcanic islands, a
track marking the position of the plume
relative to the moving plate. The natural
history of the Hawaiian island chain
clearly shows the movement of the
Pacific plate over a fixed plume.


Q23: 請問這題為何不是D?
It can be inferred from the passage that a chain of volcanoes created by a mantle plume would most likely be characterized by

A. a curved outline
B. constituent volcanoes that differ from each other in age
C. occurrence near a plate boundary where one plate bends under another
D. appearance near many other volcanic chains
E. rocks with a wide range of chemical composition

[liwuu]

當初我也是選D...不過仔細看一遍文章,發現並沒有明確提到
而答案B在line46~52這句話則可判斷

[blue123736]

恩...B的確比D好

不過我在選的時候是考量A跟B

雖然最後選B

但是我想問問A怎麼不好？

A) a curved outline
我是解讀為=>一個彎曲（凸起）的地表輪廓

[Behemoth]

同樣囉
在原文中並沒有明確提到a
所以不選

[davidlee0222]

23.It can be inferred from the passage that a chain of volcanoes created by a mantle plume would most likely be characterized by
題目是問
一串由MP形成的一串火山
最可能有何特徵

A無關
B用水上飄就非常清楚
是講constituent vocanoes組成的火山
that後面都是次要補述結構
在講不同年齡的組成火山
還是那些組成的火山

D在很多其他火山鏈附近出現
不一定是由同一次MP所形成的火山鏈
無判斷根據
即使很像也不能選

[pcl12]

Q25:
According to the passage, a hot spot on Earth’s surface is an indication of which of the following?

A.An untapped reservoir of hot rock in the base of the mantle
B.Volcanic activity at the edge of a plate
C.Solid mantle rock under tremendous pressure
D.The occurrence of a phenomenon unique to the Pacific plate
E.A plume of hot mantle rock originating near Earth’s core
請問答案E near Earth’s core
是由L43-46 中說far from the edge of a surface plate而推知的嗎?

[agk99]

對照第43 行，這裡的hot spot還是講熔炎流，那麼就只有選E，C不像E可以直接對應出來

[汪汪北鼻]

背景知識

熱點、熱柱與洪流玄武岩

http://hcc.earth.sinica.edu.tw/earth/plate/plume.htm


Mantle plumes and hotspots


http://www.soc.soton.ac.uk/CHD/classroom@sea/carlsberg/science/plume_tectonics.html

[nicoleliu]

背景知識

熱點、熱柱與洪流玄武岩

http://hcc.earth.sinica.edu.tw/earth/plate/plume.htm


Mantle plumes and hotspots


http://www.soc.soton.ac.uk/CHD/classroom@sea/carlsberg/science/plume_tectonics.html

真是太讚了~~
不然我這篇都做的霧煞煞.......

[JS]

Q25:
According to the passage, a hot spot on Earth’s surface is an indication of which of the following?

A.An untapped reservoir of hot rock in the base of the mantle
B.Volcanic activity at the edge of a plate
C.Solid mantle rock under tremendous pressure
D.The occurrence of a phenomenon unique to the Pacific plate
E.A plume of hot mantle rock originating near Earth’s core
請問答案E near Earth’s core
是由L43-46 中說far from the edge of a surface plate而推知的嗎?

NO the answer is not from line43-46 but instead from the passage below

Most volcanoes occur at plate
boundaries. However, certain “mis-
placed” volcanoes(the one cause hot spot) far from plate
(25) edges result from a second, indepen-
dent mechanism that cools the deep
interior of Earth. Because of its prox-
imity to Earth’s core, the rock at the
base of the mantle is much hotter than
(30) rock in the upper mantl

[chihhan123]

因為心急如焚...只好全篇翻譯，以求看懂...(徐天后，我對不起你...)

如果你也程度不好，看懂在去考試吧!!

第一段
地球的表面是由經常漂移且互相擠壓的建硬板塊組成，板塊運動是地函運動的表層顯現現象 (地函: 在地殼與金屬地核中間的薄層岩石)，雖然炙熱的地函岩石是固體，但是在地殼與地函底層岩石間極大的壓力之下，他流動地像是黏稠的液體。地函的運動，比喻成沸騰的水，將熱的物質帶到表面然後變成較冷的物質回到深處，用以降低地函的溫度。當板塊的邊緣彎曲到另一個板塊的下方，他較冷的物質被地函所吸收，火山運動以熔化的熔岩由隱沒的板塊升起，並經由在上層的板塊噴發的形式發生。

第二段

許多的火山發生在板塊的邊緣，然而，第二種獨立的冷卻地球內部機制造成了某些「跑錯位置」的火山離板塊的邊緣很遠。因為接近地核，地函底層的岩石比上地函的岩石要熱多了，地函岩石越熱，越抵抗不住流動。這些炎熱岩石的儲存，集中在地函底部(下地函) 當這些儲存夠多，半球狀的岩石迫使他透過上地函到地球表面，形成一個廣闊的突出地形。「熱柱」因此形成了，一但他被建立便會持續地引自地函底層導熱物質，直到所有儲存耗盡，熱柱在表層所留下的記號稱作「熱點」，一個遠離表面板塊的獨立火山及上升的地形區域。因為熱點的來源保持固定但表面的板塊會移動，長時間下來，活躍的熱柱造成了一系列的火山及火山島，相當是一個熱柱與板塊相對位置的軌道標記。夏威夷島鏈地自然歷史清楚地呈現了太平洋板塊通過固定熱柱的運動

[lunar916]

Q25:
According to the passage, a hot spot on Earth’s surface is an indication of which of the following?

A.An untapped reservoir of hot rock in the base of the mantle
B.Volcanic activity at the edge of a plate
C.Solid mantle rock under tremendous pressure
D.The occurrence of a phenomenon unique to the Pacific plate
E.A plume of hot mantle rock originating near Earth’s core
請問答案E near Earth’s core
是由L43-46 中說far from the edge of a surface plate而推知的嗎?

NO the answer is not from line43-46 but instead from the passage below

Most volcanoes occur at plate
boundaries. However, certain “mis-
placed” volcanoes(the one cause hot spot) far from plate
(25) edges result from a second, indepen-
dent mechanism that cools the deep
interior of Earth. Because of its prox-
imity to Earth’s core, the rock at the
base of the mantle is much hotter than
(30) rock in the upper mantl

我覺得是32-43:

Reservoirs of this hot rock collect in the base of the mantle.
...continues to channel hot material from the mantle base until the reservoir is emptied
...an established plume is a hot spot

也就是說
reservoirs > plume > hot spot
hot spot 的石頭是reservoir 來的, reservoir在lower mental, so rock originating near Earth’s core

[lunar916]

GWD-7-Q24:
The author’s reference to the Hawaiian Islands serves primarily to

A. provide an example of a type of volcanic activity that does not occur elsewhere
B. identify the evidence initially used to establish that the Pacific plate moves
C. call into question a theory about the source of the volcanoes that created the Hawaiian Islands
D. illustrate the distance from plate edges at which volcanoes typically appear
E. provide an example of how mantle plumes manifest themselves on Earth’s surface

ans: E

====

未啥是E? 怎麼看阿??
我選B.. @@

[小智]

我也選B 不過看了看 還是E對
因為Hawaiian Islands這個例子是出現在第二個機制 要選mantle plumes才對
而B講的重點是第一段的板塊運動邊緣會產生火山
雖然第二段最後一句又提到太平洋板塊運動 但跟第一段無關
因為Hawaiian Islands的火山並非在板塊邊緣

[jinoliway]

我可以請問 25題的
A.An untapped reservoir of hot rock in the base of the mantle
是怎麼個錯法嗎？
我第一次做。糊里糊塗選A選對了
今次做的仔細。卻選到了E
怎生辦法阿