1. Which one among the following covers the highest percentage of forest area in the world?
(a) Temperate coniferous forests
(b) Temperate deciduous forests
(c) Tropical monsoon forests
(d) Tropical rain forests
(a) Temperature coniferous forests covers the highest percentage of forest area in the world.
2. Among the following which planet takes maximum time for one revolution around the Sun?
(a) Earth
(b) Jupiter
(c) Mars
(d) Venus
(b) Jupiter takes maximum time for one revolution i.e., 11 year 86 days. Mars take 687 days, Venus takes 267 days.
3. Assertion (A) : Thickness of the atmosphere is maximum over the Equator.
Reason (R) : High isolation and strong convection currents occur over the Equator.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
(d) The circulation of atmosphere and oceans is funda-mentally caused by the fact that the amount of incoming solar radiation varies from a maximum at the equator to a minimum at the poles. More reflection and absorption of incoming radiation takes place in high latitude because of the greater thickness of atmosphere that must be penetrated. Thickness of the earth is maximum over the pole.
4. Where is the volcanic mountain, Mount St. Helens located?
(a) Chile
(b) Japan
(c) Philippines
(d) United States of America
(d) Volcanic mountain. St. Helen is located in United States of America.
5. Assertion (A) : The same face of the moon is always presented to the earth.
Reason (R) : The moon rotates about its own axis in 23 and half days which is about the same time that it
takes to orbit the earth.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is NOT a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
(c) The moon rotates about its own axis in 27.322 days. When the Moon first formed, its rotational speed and orbit were very different than they are now. Over time, the Earth's gravitational field gradually slowed the Moon's rotation until the orbital period and the rotational speed stabilized, making one side of the moon always face the Earth.