Q. What is the approximate average thickness of the Earth’s continental crust?
(A) 5 miles
(B) 15 miles
(C) 25 miles
(D) 35 miles

The answer is: (C) 25 miles ☑

Q. According to the scientists, how many galaxies are there in the universe?
(A) 10 million
(B) 100 million
(C) 10 billion
(D) 100 billion

The answer is: (D) 100 billion ☑

Q. What is the maximum temperature that the human skin can endure without getting blisters?
(A) 40°C
(B) 60°C
(C) 80°C
(D) 100°C

The answer is: (A) 40°C ☑

Q. Which of the following substance is NOT a conductor?
(A) Aluminum
(B) Silicon
(C) Graphite
(D) All are conductors

The answer is: (D) All are conductors ☑

Q. What is the most abundant form of matter in the universe?
(A) Plasma
(B) Liquid
(C) Gas
(D) Solid

The answer is: (A) Plasma ☑

Q. About how much energy entering earth’s atmosphere is from the sun?
(A) 70%
(B) 80%
(C) 90%
(D) 99.9%

The answer is: (D) 99.9% ☑

Q. Deficiency of Vitamin-D results in
(A) night blindness
(B) rickets
(C) scurvy
(D) hair fall

The answer is: (B) rickets ☑

Q. During winter in cold countries, the __________ is mixed to melt the ice on the icy roads.
(A) Salt
(B) Chlorine
(C) Carbon dioxide
(D) Water

The answer is: (A) Salt ☑

Q. The planet that moves round the Sun at the highest speed is
(A) Jupiter
(B) Venus
(C) Mars
(D) Mercury

The answer is: (D) Mercury ☑

Q. Oxidation is a chemical reaction involving the
(A) Gain of Electrons
(B) Loss of Electrons
(C) Gain of Protons
(D) Loss of Protons

The answer is: (B) Loss of Electrons ☑

Q. The position of an element in the Periodic Table is determined by its __________ number.
(A) Electron
(B) Proton
(C) Neutron
(D) Positron

The answer is: (B) Proton ☑

Q. At night
(A) The land cools faster than the water in the sea
(B) The water in the sea cools faster than the land
(C) The land and the water in the sea cools together
(D) None of these

The answer is: (A) The land cools faster than the water in the sea ☑