GEOGRAPHY HIGH SCHOOL

Tectonic plate movement is created by _____ in the underlying mantle.rigidity
low temperatures
convection
condensation

Answers

Answer 1
Answer: Tectonic plate movement is created by convection in the underlying mantle. The correct option among all the options given in the question is the third or the second last option. The convection current is caused due to the temperature difference in the mantle. The material of the mantle near the core is very hot while the mantle material near the Lithosphere is cooler in comparison to the core.

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Where is the Strait of Gibraltar?

Answers

it is the entry into the Mediterranean sea from the Atlantic Ocean. It borders Africa and Europe.
Between Spain & Africa

The continental crust is made largely ofa. gneiss.
b. granite.
c. basalt.
d. limestone.

Answers

Answer: b. granite.

The continental crust is made largely of granite.

Explanation:

Granite is an igneous rock which consists of grains. It can be white, pink or gray in colour depending on its mineralogy.  It is made up of feldspar and quartz with little mica, amphiboles and other minerals. It is buried beneath kilometers of rock and sediment in order to produce enough heat to melt rock during its formation.  It is used to make paving stone, curbing, stair treads, building veneer, floor tiles and so on and also the continental crust is made largely of it.
The continental crust is made largely of, B.Granite rocks 

The United States has two major oceanographic research institutions. They are located in: Massachusetts and California California and New York Massachusetts and Florida Florida and Maine

Answers

The United States has two major oceanographic research institutions. They are located in Massachusetts and California.

Earth revolves around the , which is at the center of our solar system. the revolves around earth as a natural satellite

Answers

The Earth moves around the Sunwhile it, in turn, is also moving.  

A natural satellite is a celestial body orbiting a planet. The Moon is the only natural satellite on Earth, which revolves around it.  

The answer is: The sun and the moon, in that order.

Answer:

The Earth moves around the Sun while it, in turn, is also moving.  

A natural satellite is a celestial body orbiting a planet. The Moon is the only natural satellite on Earth, which revolves around it.  

The answer is: The sun and the moon, in that order.

Explanation:

  • The Earth is the third planet from the Sun and it rotates and revolves around the sun on an imaginary line of its axis. For completing one rotation it takes 24 hours and for completing one revolution it takes 365 days.
  • The Sun is in the center of our solar system and all the planets revolve around the sun at their axis.
  • The Moon is the natural satellite of the earth.

When oceanic crust is pulled under continental crust at a convergent plate boundary what is created?A.subduction zone
B.mid-ocean ridge
C.rift valley
D.landslide

Answers

Answer:

c

Explanation:

Answer: The answer is a subduction zone.

Explanation:

The crustal surface varies in density—the oceanic crust is heavier than the continental crust. composition, density, and thickness. isostasy, density, and rock competence. thickness—the oceanic crust is thinner than the continental crust.

Answers

Answer:

Yes, The oceanic crust is more dense but thinner than the continental crust,

Explanation:

  • As the continental crust is  35-40 km, more thicker than that of the oceanic crust and it accounts for a mean surface elevation of three miles. Hence the continental crust is lighter than the oceanic crust and thus the less dense crust floats or stays at the top but the thickness of the oceanic crust is 7 to 10 km.
  • As the surface crust is a layer of the granitic and the sedimentary and metamorphic rocks and about 40% of the earth's surface is formed by this plate or continental crust and rest 60% is by the oceanic crust which is made of basalt. Both are less dense than the mantel.
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