Class 8    Geography    Example [GEO-8.8]

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Q 1. The inner core predominantly comprises ---------- and ----------.
 
  • Nickel , Iron
  • Zinc, Calcium
  • Silica, Zinc
  • Silica, Calcium
 
Q2. The temperature at the centre of the earth is estimated to be ----------.
  • 45000 C
  • 52000 C
  • 51000 C
  • 50000 C
 
Q3. The rocks in the upper ---------- km of the mantle melt due to heat.
  • 250 to 350
  • 100 to 200
  • 200 to 300
  • 300 to 400
 
Q4. What is the approximate thickness of the core ?
  • 4471 Km
  • 3741 Km
  • 3471 Km
  • 3147 Km
 
Q5. The study of ---------- waves has helped in determining the different layers of the interior of the earth and their boundaries.
  • earthquake
  • electromagnetic
  • mechanical
  • sound
Q6. The density of materials in the crust is ----------.
  • 4.7 to 5 g/cm3
  • 2.7 to 3 g/cm3
  • 5 to 6 g/cm3
  • 1 to 2 g/cm3
 
Q7. The inner core of the Earth is in which state ?
  • solid
  • liquid
  • gas
  • vapor
 
Q8. What is the thickness of the mantle ?
  • about 2270 Km
  • about 3170 Km
  • about 2870 Km
  • about 3870 Km
 
Q9. In the interior of the earth the temperature is ---------- compared to the outer body.
  • lower
  • unchanged
  • zero
  • higher
 
Q10. State True or False: "the interior of the earth is unstable."
  • Blank
  • TRUE
  • FALSE
  • Blank
   
 
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