Question

If a deep-ocean trench is located adjacent to a continent, active volcanoes would likely be found

Answer 1

WELCOME TO OS:)
Its landwd from the trench.

Answer 2

and this might help u too!
http://answers.yahoo.com/question/index?qid=20120925175923AAUown4

Answer 3

4. Which was not used in support of the continental drift hypothesis?


coastline fit of South America and Africa
ancient climate
fossil evidence
composition of meteorites

Answer 4

Its D composition of meteorites .

Answer 5

5. Continental volcanic arcs are associated with the _____ plate boundary.


convergent oceanic-oceanic
convergent oceanic-continental
transform fault
convergent continental-continental

Answer 6

Its B convergent oceanic-continental .

Answer 7

Is THAT UR HOMEWORK???

Answer 8

9. Wegener’s idea that tidal forces might cause continental drift was refuted as impossible when research _____.


determined that Earth’s overall density was too low
showed that tidal forces needed to move continents did not exist 200 million years ago
determined that Earth’s magnetic field was too strong
showed that the tidal forces needed to move continents would stop Earth’s rotation

10. Which is an example of reverse polarity?


the north magnetic pole is aligned with the present north magnetic pole
Earth’s magnetic field lines up in the same direction as the present magnetic field
Earth’s magnetic field lines up in a direction opposite of the present magnetic field
the south magnetic pole lines up with the present south magnetic pole

11. What is the name given by Wegener to the supercontinent that he proposed existed before the current continents?


Euroamerica
Atlantis
Pangaea
Panamerica

12. Volcanic island arcs are associated with which type of plate boundary?


convergent oceanic-continental
convergent continental-continental
divergent plate
convergent oceanic-oceanic

13. What did the pattern of earthquakes in the Wadati-Benioff seafloor zones show scientists?


Many earthquakes take place 700 kilometers below the seafloor.
Deep-ocean trenches cause earthquakes.
Earthquakes occur where the ocean floor reaches its highest temperatures.
Slabs of ocean floor return to the mantle in subduction zones.

14. Wegener’s continental drift hypothesis stated that all the continents were once joined together to form _____.


two major supercontinents
three major supercontinents
two major supercontinents and three smaller continents
one major supercontinent

15. Strips of alternating magnetic polarities found in rocks in the ocean basins _____.


provide evidence for sea-floor spreading
conflict with the theory of plate tectonics
indicate changes in Earth’s gravitation field
provide evidence that Earth’s magnetic field has never reversed polarity

Answer 9

LoL is this ur home . test or wht???

Answer 10

yea
home work

Answer 11

Did u try to do them first??

Answer 12

yeah i even have notes but i failed

Answer 13

9# Is, showed that the tidal forces needed to move continents would stop Earth’s rotation

Answer 14

10 # Is, Earth’s magnetic field lines up in a direction opposite of the present magnetic field .

Answer 15

11# its Pangaea

Answer 16

i got those ones now thank u do u think u can do some more??

Answer 17

ok

Answer 18

Which of the following is not a major component of magma?


partially melted mineral crystals
water
lava
dissolved gases

2. A volcanic bomb is a _____.


pocket of gas that is released suddenly
tiny particle of ejected rock less than 64 mm in size
very violent volcanic explosion
piece of semi-molten rock ejected as glowing lava

3. Which three factors affect the formation of magma?


heat, pressure, and water content
heat, mineral crystals, and dissolved gases
heat, pressure, and dissolved gases
heat, mineral crystals, and water content

4. Unlike a volcanic mountain, a batholith forms from magma that _____.


erupts and flows onto the surface as lava
collects over time in a large magma chamber
causes metamorphic changes to existing rock
cools and hardens beneath the surface

5. A hot plume of mantle material, which may extend to the core-mantle boundary, produces a volcanic region a few hundred kilometers across called a _____.


mantle plume
hot spot
Ring of Fire
volcanic arc

6. What is the Ring of Fire?


a chain of volcanoes circling the Pacific Basin
a circle of mantle plumes around the Pacific Basin
a chain of volcanoes that are entirely under water
a ring of volcanoes around the Atlantic Basin

7. What is a lava flow with a surface of rough, jagged blocks and sharp, angular projections called?


pahoehoe flow
aa flow
ash flow
pyroclastic flow

8. A caldera is a _____.


large depression in a volcano
type of volcano
type of volcanic eruption
very large volcanic bomb

9. Which statement is not true of a batholith?


It is the largest intrusive igneous body.
It may form the core of a mountain range.
It is often a small part of a sill.
It may be uplifted and then exposed by erosion.

10. The walls of the Grand Canyon are made of layers of sandstone. A dike cuts across some of the layers. When did the dike form?


at the same time as the sandstone formed and the canyon was eroded
after erosion revealed the canyon wall
after the sandstone formed and before erosion revealed the canyon wall
before the sandstone formed

11. Which factor does not help determine whether a volcanic eruption will be explosive or relatively quiet?


the composition of the lava
the temperature of the magma
the composition of the magma
the amount of dissolved gases in the magma

12. Which step is part of the formation of a batholith?


Lava flows across a mountain or plain, and then hardens into rock.
Heat and pressure change a pluton into metamorphic rock.
Many plutons clump together as they rise through the crust.
A single pluton enlarges into a huge mass by melting the rock around it.

13. The particles produced in volcanic eruptions are called _____.


volcanic stocks
pyroclastic material
calderas
laccoliths

14. How do scientists classify intrusive igneous features?


according to shape, size

Answer 19

lol

Answer 20

did u finish all of previous ones???

Answer 21

these ones i ahve no idea cause i have no notes an yea i did

Answer 22

Umm..

Answer 23

1# partially melted mineral crystals

Answer 24

2# A pyroclastic flow. So i think its A pocket of gas that is released suddenly ..

Answer 25

3# its mixture of heat, Pressure, mineral composition and the water content ..

Answer 26

Holy moly @Rina.r Are you sure you're not doing her homework for her? >.<

Answer 27

I asked her that is ur homework and did u try doing it??
She said yup its my homework, i tried even i have notes but it doesn't work.. so i need help...@wolfe8

Answer 28

So for 3 i think its D heat, mineral crystals, and water content

Answer 29

5 # is A mantle plume

Answer 30

6# a chain of volcanoes circling the Pacific Basin

Answer 31

7 # aa flow

Answer 32

thank u soo much for this

Answer 33

8 # large depression in a volcano

Answer 34

11 # the temperature of the magma

Answer 35

12 # Many plutons clump together as they rise through the crust.

Answer 36

13 # pyroclastic material

Answer 37

14 # according to shape, size

Answer 38

DONE!!

Answer 39

lol thats fast

Answer 40

what about 9 10 and 4

Answer 41

and 15

Answer 42

I helped u with the ones i know..

Answer 43

lol sorry

Answer 44

its ok

Answer 45

and could u plz close this question now!!

Answer 46

j i do that