Temperature of the inner portion of the Mantle is
a) 550°C
b) 870°C
c) 4,000°C
d) 3,600°C
Crust:
Outmost layer of earth is………………….
a) Mountain
b) Crust
c) Trench
d) Ridge
Which of the following is the lightest and thinnest layer of the earth?
a) Core
b) Crust
c) Mantle
d) none of these
Thickness of crust under continents is (average)
a) 20-70 km
b) 30-30 km
c) 50-80km
d) None of these
Minimum thickness of crust under oceans is…
a) 5-10 km
b) 12-15 km
c) 15-18 km
d) 20-25 km
