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CBSE Class 9 Shaping of the Earth Surface — practice questions — page 2

Explore 121 free Shaping of the Earth Surface questions in CBSE Class 9 Social Science. Open each question or exercise to read its content, reference answers and available explanation.

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Shaping of the Earth Surface questions and exercises with answers

Showing questions 31–60 of 121.

At the Mid-Atlantic Ridge, about how fast do tectonic plates move each year?Read the answer and worked solution →What process carries the edge of one plate down under another at a convergent boundary?Read the answer and worked solution →Which planet is the only one known to have active plate tectonics today?Read the answer and worked solution →Which layer lies beneath the lithosphere and is hotter and flows more easily?Read the answer and worked solution →What drives the slow movement of tectonic plates?Read the answer and worked solution →Which type of plate boundary has two plates moving toward each other?Read the answer and worked solution →In older texts, what name was given to oceanic crust?Read the answer and worked solution →How was continental drift received when first proposed?Read the answer and worked solution →Which two continents fit together across the Atlantic?Read the answer and worked solution →What lets hot lava, ash and gases escape from a magma chamber below ground?Read the answer and worked solution →What is the scientific study of volcanoes called?Read the answer and worked solution →The word volcano comes from the name of which Roman god of fire?Read the answer and worked solution →Which volcano category has no magma source and cannot erupt at all?Read the answer and worked solution →Shield volcanoes are named for what feature?Read the answer and worked solution →What is the underground point where an earthquake's rupture first begins called?Read the answer and worked solution →What is the point on the ground directly above an earthquake's focus called?Read the answer and worked solution →What creates the seismic waves of an earthquake?Read the answer and worked solution →What mostly causes earthquakes?Read the answer and worked solution →Which human activity can induce earthquakes?Read the answer and worked solution →Which earthquake is the largest ever measured on a seismograph?Read the answer and worked solution →Which 1976 Chinese earthquake killed over 300,000 people?Read the answer and worked solution →Which field designs buildings that can withstand earthquake shaking?Read the answer and worked solution →In which decade did instrumental measurement of earthquake size begin with the Richter scale?Read the answer and worked solution →How does weathering differ from erosion?Read the answer and worked solution →Which kind of weathering breaks rock apart without any chemical change?Read the answer and worked solution →Which form of physical weathering is considered the most important?Read the answer and worked solution →By how much does water's volume increase when it freezes?Read the answer and worked solution →What is the widening of rock cracks as water freezes?Read the answer and worked solution →Where is thermal stress weathering most important?Read the answer and worked solution →Which living things grow on bare rock surfaces and help break them down?Read the answer and worked solution →

Worked practice questions

At the Mid-Atlantic Ridge, about how fast do tectonic plates move each year?

  1. 400 to 500 mm a year
  2. 100 to 150 mm a year
  3. 1 to 4 mm a year
  4. 10 to 40 mm a year
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Correct answer: D. 10 to 40 mm a year

Plates at the Mid-Atlantic Ridge move about 10 to 40 mm a year, roughly as fast as fingernails grow.

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What process carries the edge of one plate down under another at a convergent boundary?

  1. Deposition
  2. Leaching
  3. Subduction
  4. Exfoliation
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Correct answer: C. Subduction

Subduction is the process in which the edge of one plate is pushed down under the other plate.

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Which planet is the only one known to have active plate tectonics today?

  1. Venus
  2. Earth
  3. Mars
  4. Jupiter
Show answer and solution

Correct answer: B. Earth

Earth is the only planet where plate tectonics is known to be active right now.

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