Related Questions

The most abundant element in the earth 's crust is oxygen . The second most abundant element is the earth's crust is -
A Hydrogen
B Silicon
C Nitrogen
D Brass
The mean thickness of oceanic crust and continental crust is around:
A 5 kilometer and 15 kilometer respectively.
B 10 kilometer and 30 kilometer respectively.
C 5 kilometer and 30 kilometer respectively.
D 18 kilometer and 40 kilometer respectively.
When an object enters earths atmosphere, it travels ----
A very repidly
B in a rapid manner
C fastly
D rapidly
The noble gas which occurs most abundantly in the atmosphere is
A Helium
B Neon
C Krypton
D Argon
Which of the following commercial metals is most abundantly found in India?
A Copper
B Aluminium
C Nickel
D Zinc
Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land?
A It greatly increases the crop production
B It makes some soils impermeable
C It raises the water table
D It fills the air spaces in the soil with water
Which one of the following is present in the largest amount in terms of percent by mass in the Earth's crust?
A Silicon
B Oxygen
C Carbon
D Calcium
Which one of the following elements is most abundant in the earth's crust?
A Oxygen
B Sulphur
C Silicon
D Carbon
Which one of the following is present in the largest amount in terms of per cent by man In the earth's crust?
A Silicon
B Oxygen
C Carbon
D Calcium
Find out which quotation parts of the following sentences has an error. Trenches in the ocean floor are of 'great interest' because they are lines 'where' the earth crust often is 'so weak' to resist the impact of 'frequent earthquakes'.
A great interest
B where
C so weak
D frequent earthquakes

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