The vibration direction parallel to the wave direction in the vertical plane is present in
  • P-waves
  • S-waves
  • Surface waves
  • L-wave
The interior of the earth can only be understood by ______________
  • Direct methods
  • Indirect methods
  • Both the indirect and direct methods
  • None of the Above
Which is not a type of volcano?
  • Shield volcano
  • Composite volcano
  • Ridge volcano
  • Caldera
Volcanoes are
  • indirect source of information about the earth's interior.
  • direct source of information about the interior of the earth.
  • not a source of information about the interior of the earth.
  • good source to ascertain earth's temperature.
Which one of the following describes the lithosphere?
  • Upper and middle mantle
  • Crust and upper mantle
  • Crust and core
  • Mantle and core
The magnitude of an earthquake is measured in
  • Richter Scale
  • Mercalli scale
  • Measuring scale
  • Seismograph
Magma refers to ____
  • Rocks
  • Material in the upper mantle
  • Material in the upper core
  • Material in the crust
What is the thickness of the earth's crust in the Himalayan region?
  • 75 kms
  • 60 kms
  • 70 kms
  • 65 kms
Earthquake waves are recorded on the
  • Seismograph
  • Barograph
  • Pantograph
  • Ergograph
The upper portion of the mantle is known as
  • Asthenosphere
  • Crust
  • Lithosphere
  • Fossil Sphere
Which one of the following is a direct source of the information about the interior of the Earth?
  • Earthquake waves
  • Volcanoes
  • Gravitational force
  • Earth magnetism
What is the density of the rocks between the adjoining line on mantle and core?
  • 3-4 gm. per sq. cm
  • 5 gm. per sq. cm
  • 4-5 gm. per sq. cm
  • 6 gm. per sq. cm
What is the approximate depth of the mantle?
  • 2400 km
  • 2900 km
  • 3200 km
  • 3500 km
The Deccan trap is a large
  • flood plain
  • flood basalt province
  • lava plain
  • shield volcano
What is the thickness of the crust?
  • 10 km to 200 km
  • 5 km to 30 km
  • 30 km to 400 km
  • 100 km to 200 km
What is the mean thickness of oceanic crust?
  • 5 km
  • 30 km
  • 10 km
  • 70 km
The intensity of an earthquake is measured in
  • Richter Scale
  • Mercalli scale
  • Measuring scale
  • Seismograph
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