Q. No 1. Encircle the correct option.
1) The place of origin of an earthquake inside the crust is called the —————-.
a) Fault
b) Epicenter
c) Focus
d) Chamber
2) Outer core of earth is ——–km thick.
a) 2400
b) 2300
c) 2500
d) 2600
3) Diameter of inner core of earth is ——- km.
a) 2400
b) 2300
c) 2500
d) 2600
4) Interior of the earth is comprised of —– layers.
a) 1
b) 2
c) 3
d) 4
5) There are ——- major tectonics plates.
a) 3
b) 5
c) 7
d) 9
6) Faults are the large cracks in the earth’s ———.
a) Mantle
b) Core
c) Crust
d) None
7) Tsunamis create up to —- meters huge waves in the ocean.
a) 10
b) 20
c) 30
d) 40
8) Seismic waves are recorded by an instrument called———.
a) Anemometer
b) Hygrometer
c) Barometer
d) Seismograph
9) The mouth of the volcano is called ——–.
a) Caldera
b) Vent
c) Crater
d) None
10) The ring of fire is a 25000 miles long zone around the ——- Ocean.
a) Atlantic
b) Indian
c) Pacific
d) Antarctic
11) Breakdown of rocks into smaller fragments is called ——–.
a) Erosion
b) Weathering
c) Rusting
d) None
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