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Interior Of Earth Online Test 7th Social Science Lesson 3 Questions in English
Interior Of Earth Online Test 7th Social Science Lesson 3 Questions in English
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Question 1 |
On the basis of the study of earthquake waves the spherical earth is found to be ________ concentric Layers
2 | |
3 | |
4 | |
6 |
Question 1 Explanation:
Explanation: On the basis of the study of earthquake waves the spherical earth is found to be three concentric layers.
Question 2 |
Which is the outermost layer of the earth?
Sigma | |
Core | |
Crust | |
Mantle |
Question 2 Explanation:
Explanation: The crust is the outermost layer of the earth.
Question 3 |
The thickness of Crust Varies from
5-15 km | |
5-30 km | |
10-20 km | |
10-30 km |
Question 3 Explanation:
Explanation: The crust is the outermost layer of the earth. Its average thickness varies from 5 to 30 km
Question 4 |
How much Km is of Crust of Ocean floors?
5 km | |
10 km | |
15 km | |
30 km |
Question 4 Explanation:
Explanation: It is about 35 km on the continental masses and only 5 km on the ocean floors.
Question 5 |
The continental crust is _____ dense than the oceanic crust because it is made of both light and dense rock types.
More | |
Less | |
Equal | |
None of above |
Question 5 Explanation:
Explanation: The continental crust is less dense than the oceanic crust because it is made of both light and dense rock types.
Question 6 |
The oceanic crust is composed mostly of dense rocks such as
Sigma | |
Basalt | |
Lime | |
Gabbro |
Question 6 Explanation:
Explanation: The oceanic crust is composed mostly of dense rocks such as basalt.
Question 7 |
Earth is called as blue Planet because _____% of the earth is covered by water
68 | |
69 | |
71 | |
73 |
Question 7 Explanation:
Explanation: Earth is called as blue Planet. 71% of the earth is covered by water.
Question 8 |
The upper part of crust consists of granite rocks and forms the continents called
Sigma | |
Sial | |
Core | |
Basalt |
Question 8 Explanation:
Explanation: The upper part consists of granite rocks and forms the continents. It has the main mineral constituents are silica and alumina. So it is collectively referred to as Sial.
Question 9 |
The average density of sial is
2.1 g/cm^3 | |
2.5 g/cm^3 | |
2.7 g/cm^3 | |
3 g/cm^3 |
Question 9 Explanation:
Explanation: It has an average density of 2.7g/cm3.
Question 10 |
The lower part of crust is a continuous zone of denser basaltic rocks forming the ocean floors called
Sigma | |
Sial | |
Mantle | |
Core |
Question 10 Explanation:
Explanation: The lower part is a continuous zone of denser basaltic rocks forming the ocean fl oors, comprising mainly of silica and magnesium. It is therefore called Sima.
Question 11 |
The Sima has a average density of
2.1 g/cm^3 | |
2.5 g/cm^3 | |
2.7 g/cm^3 | |
3 g/cm^3 |
Question 11 Explanation:
Explanation: The lower part is a continuous zone of denser basaltic rocks forming the ocean floors, comprising mainly of silica and magnesium. It is therefore called Sima. It has an average density of 3.0g/cm3.
Question 12 |
The next layer beneath the crust is called the
Core | |
Sigma | |
Mantle | |
Crust Rock |
Question 12 Explanation:
Explanation: The next layer beneath the crust is called the mantle
Question 13 |
Mantle is separated from the crust by a boundary called
Lithosphere plates | |
Basalt rocks | |
Mohorovicic discontinuity | |
None of above |
Question 13 Explanation:
Explanation: The next layer beneath the crust is called the mantle. It is separated from the crust by a boundary called Mohorovicic discontinuity.
Question 14 |
Which of following is False
The mantle is about 2,900 km thick. | |
The upper mantle with a density of 3.4 – 4.4g/cm3. extends down to 700 km | |
The lower mantle having a density of 4.4– 5.5g/cm3 extends from 700 to 2000 km | |
All are False |
Question 14 Explanation:
Explanation: The mantle is about 2,900 km thick. It is divided into two parts. (i) The upper mantle with a density of 3.4 – 4.4g/cm3. extends down to 700 km. (ii) The lower mantle having a density of 4.4– 5.5g/cm3 extends from 700 to 2,900 km.
Question 15 |
The innermost layer of the earth is called the core. It is also known as
Barysphere | |
Lithosphere | |
Garyosphere | |
Coress |
Question 15 Explanation:
Explanation: The innermost layer of the earth is called the core. It is also known as barysphere.
Question 16 |
Core is Separated from mantle by
Mohorovicic discontinuity | |
Weichart-Gutenberg discontinuity | |
Aestenosphere | |
None |
Question 16 Explanation:
Explanation: It is separated from the mantle by a boundary called Weichart-Gutenberg discontinuity.
Question 17 |
The inner core, composed of ______and ______ which is solid in state.
Copper and Ferrous | |
Nickel and Ferrous | |
Zinc and Copper | |
Ferrous and Zinc |
Question 17 Explanation:
Explanation: The inner core, composed of Nickel and Ferrous (Nife), is solid in state.
Question 18 |
The average density of core is
13 g/cm^3 | |
10 g/cm^3 | |
15 g/cm^3 | |
23 g/cm^3 |
Question 18 Explanation:
Explanation: The average density of core is 13.0 g/cm3.
Question 19 |
The crust forms only 1 per cent of the volume of the earth, _____ % consists of the mantle and ____ makes the core.
84 and 15 | |
75 and 24 | |
90 and 9 | |
23 and 76 |
Question 19 Explanation:
Explanation: The crust forms only 1 per cent of the volume of the earth, 84 % consists of the mantle and 15 % makes the core.
Question 20 |
The radius of the earth is
6200 km | |
6371 km | |
5431 km | |
7254 km |
Question 20 Explanation:
Explanation: The radius of the earth is 6371 km.
Question 21 |
The outer core, which is rich in _____ is in liquid state
Iron | |
Chromium | |
Phosphorous | |
Nickel |
Question 21 Explanation:
Explanation: The outer core, which is rich in iron, is in liquid state. It extends between 2,900 – 5,150 km.
Question 22 |
The lithosphere is broken into a number of plates known as the
Earth plates | |
Tectonic Plates | |
Wave plates | |
Lithospheric Plates |
Question 22 Explanation:
Explanation: The lithosphere is broken into a number of plates known as the Lithospheric plates.
Question 23 |
The movement of the Earth’s lithospheric plates is termed as
Plate Movement | |
Tectonic movements | |
Plate waves | |
Lithosphere movement |
Question 23 Explanation:
Explanation: The movement of the Earth’s lithospheric plates is termed as tectonic movements.The energy required to move these plates is produced by the internal heat of the earth.
Question 24 |
Which is the is the part of the mantle that flows and moves the plates of the earth?
Lithosphere | |
Barysphere | |
Aesthenosphere | |
Garyosphere |
Question 24 Explanation:
Explanation: Asthenosphere - The asthenosphere is the part of the mantle that flows and moves the plates of the earth.
Question 25 |
When an oceanic plate collides with a continental plate, the denser oceanic plate is forced _____ the continental plate
Above | |
Below | |
To Collide | |
None |
Question 25 Explanation:
Explanation: When an oceanic plate collides with a continental plate, the denser oceanic plate is forced below the continental plate. As a result of the pressure from above the rocks heats up and melt. The molten rocks rise again forming volcanic mountains along the continental edge.
Question 26 |
The forces which act in the interior of the earth are called as
Exogenic Foreces | |
Endogenic forces | |
Gravitational Forces | |
Balanced Forces |
Question 26 Explanation:
Explanation: The forces which act in the interior of the earth are called as Endogenic forces and the forces that work on the surface of the earth are called as Exogenic forces.
Question 27 |
A sudden movement of a portion of the earth’s crust which produces a shaking or trembling is known as an
Tremor | |
Earthquake | |
Richter | |
None of above |
Question 27 Explanation:
Explanation: A sudden movement of a portion of the earth’s crust which produces a shaking or trembling is known as an earthquake
Question 28 |
From the focus, the earthquake vibrations travel in different directions in the form of
Plates | |
Seismic Plates | |
Seismic Waves | |
Tremors |
Question 28 Explanation:
Explanation: From the focus, the earthquake vibrations travel in different directions in the form of seismic waves.
Question 29 |
The point where these vibrations originate is called the
Epicentre | |
Centroid | |
Focus | |
Core |
Question 29 Explanation:
Explanation: The point where these vibrations originate is called the focus of the earthquake. The point of the earth’s surface directly above the focus is called the epicentre of the earthquake.
Question 30 |
The earthquake waves are recorded by an instrument known as
Quakemeter | |
Richter scale | |
Seismograph | |
Altimeter |
Question 30 Explanation:
Explanation: The earthquake waves are recorded by an instrument known as seismograph.
Question 31 |
The magnitude of an earthquake is measured by the
Seismometer | |
Richter scale | |
Tremor scale | |
Gyroscope |
Question 31 Explanation:
Explanation: The magnitude of an earthquake is measured by the Richter scale
Question 32 |
The numbers on this scale range from 0 to
11 | |
9 | |
10 | |
13 |
Question 32 Explanation:
Explanation: The numbers on this scale range from 0 to 9
Question 33 |
Magnitude of ____ on Richter scale is classified as a major earthquake
7 | |
6 | |
5 | |
6.5 |
Question 33 Explanation:
Explanation: An earthquake over 5.0 on Richter scale can cause damage from things falling. A 6.0 on Richter scale or higher magnitude is considered very strong and 7.0 on Richter scale is classified as a major earthquake.
Question 34 |
Tsunami_________, is the name given to the huge wave caused in the sea by an earthquake
Indonesian Term | |
Japanese Term | |
Indian Term | |
Latin Term |
Question 34 Explanation:
Explanation: Tsunami, a Japanese term, is the name given to the huge wave caused in the sea by an earthquake. Tsunamis are quite common along the coasts of Japan and other regions in the Pacific Ocean.
Question 35 |
TSunami in the Indian Ocean swept coastal area of Indonesia, India, Srilanka, Thailand on
26th Dec 2004 | |
26th Nov 2004 | |
26th Dec 2005 | |
26th Nov 2005 |
Question 35 Explanation:
Explanation:On 26th Dec 2004 TSunami in the Indian Ocean swept coastal area of Indonesia, India, Srilanka, Thailand etc., They caused immense damage to life and property in the coastal area.
Question 36 |
How many percent of of earthquakes occur in Pacific ring of fire belt?
68 | |
70Explanation: The world’s distribution of earthquakes coincide very closely with that of volcanoes. Regions of greatest seismicity are circum-Pacific areas, with the epicenters and the most frequent occurrences along the Pacific Ring of Fire. It is said that about 68 percent of earthquakes occur in this belt. | |
72 | |
61 |
Question 36 Explanation:
Explanation: The world’s distribution of earthquakes coincide very closely with that of volcanoes. Regions of greatest seismicity are circum-Pacific areas, with the epicenters and the most frequent occurrences along the Pacific Ring of Fire. It is said that about 68 percent of earthquakes occur in this belt.
Question 37 |
In India, the Himalayan region and the ________ valley are prone to earthquake
Siwalik | |
Narmada | |
Ganga-Brahmaputra | |
None of above |
Question 37 Explanation:
Explanation: India, the Himalayan region and the Ganga-Brahamaputra valley are prone to earthquakes.
Question 38 |
Which of following is not a type of earth quake waves?
P Waves | |
N Waves | |
L waves | |
S waves |
Question 38 Explanation:
Explanation: There are three types of earthquake waves: 1. P waves or longitudinal waves 2. S waves or transverse waves 3. L waves or surface waves
Question 39 |
_______a vent or an opening in the earth’s crust through which hot magma erupts from deep below the surface.
Mountains | |
Lava | |
Volcanoes | |
Earthquakes |
Question 39 Explanation:
Explanation: A volcano is a vent or an opening in the earth’s crust through which hot magma erupts from deep below the surface. Th e opening is usually circular in form.
Question 40 |
The Latur earthquake happened in the year?
1991 | |
1993 | |
1999 | |
2003 |
Question 40 Explanation:
Explanation: Th e Deccan Plateau, which was supposed to be comparatively free from the dangers of the earthquakes, has experienced two severe earthquakes in the past, the Koyna earthquake in 1967 and the Latur earthquake in 1993.
Question 41 |
Th e molten rock material within the earth, together with gases, is called
Lava | |
Vent | |
Crater | |
Magma |
Question 41 Explanation:
Explanation: molten rock material within the earth, together with gases, is called magma.
Question 42 |
Magma Rises to the surface and it forms
Lava | |
Vent | |
Crater | |
Volcanoes |
Question 42 Explanation:
Explanation: The molten rock material within the earth, together with gases, is called magma. Aft er it rises to the surface, it is called as lava.
Question 43 |
If the crater of a volcano is of great size and is shaped like a basin it is called
Cratera | |
Caldera | |
Vent | |
Volcanic basin |
Question 43 Explanation:
Explanation: If the crater of a volcano is of great size and is shaped like a basin it is caldera
Question 44 |
The scientifi c study of valcanoes are called
Volcanists | |
Volcanology | |
Lavalogism | |
Magamology |
Question 44 Explanation:
Explanation: The scientifi c study of valcanoes are called volcanology. People who study valcanoes are called volcanologists.
Question 45 |
______has only active volcano along the chain from sumatra to Myanmar
Barren Island | |
Sumatra Zone | |
Mandalay | |
None of abaove |
Question 45 Explanation:
Explanation: Barren island is situated in the Andaman Sea, and lies about 138 km northeast of the territory's capital. It is only in active volcano along the chain from sumatra to myanmar. Last eruption occurred in 2017.
Question 46 |
Which of following is not a type of Volcanoes?
Shield Volcano | |
Cinder Cone Volcano | |
Composite Volcano | |
Sharp Volcanoes |
Question 46 Explanation:
Explanation: The shape of a volcano depends on the type of lava and the force of the eruption. On the basis of shape, there are three types of volcanoes. Th ey are: 1. Shield volcano 2. Cinder-cone volcano 3. Composite volcano.
Question 47 |
______ world’s biggest active volcano
Mt.popa | |
Mt.Etna | |
Mauna Loa | |
Mt.Hawaii |
Question 47 Explanation:
Explanation: Th ere are about 600 active volcanoes in the world, such as Mt. Stromboli in Mediterranean Sea, St.Helens in USA, Pinatubo in Philippines. Mauna Loa in Hawaii (3,255m.) is the world’s biggest active volcano.
Question 48 |
_______is known as the ‘light house of Mediterranean sea
Napoli | |
stramboli | |
Venice | |
Bologna |
Question 48 Explanation:
Explanation: Stramboli is known as the ‘light house of Mediterranean sea.
Question 49 |
How many major zones of volcanic activities in the world?
2 | |
3 | |
5 | |
6 |
Question 49 Explanation:
Explanation: There are three major zones of volcanic activities in the world. They are: 1. The Circum – Pacific belt 2. The Mid continental belt 3. The Mid Atlantic belt.
Question 50 |
The pacific ring of fire is estimated to have_____ of worlds active volcanoes.
1 third | |
2 third | |
3 fourth | |
Half |
Question 50 Explanation:
Explanation: Circum belt includes the volcanoes of the eastern and western coastal areas of Pacific Ocean. This zone is popularly termed as the Pacific Ring of Fire which has been estimated to include two-thirds of the world’s volcanoes.
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