Which one of the following reflects more sunlight as compared to the three?
Correct Answer:
(C) Land covered with fresh snow
Albedo is the fraction of solar energy (short wave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the Earth’s surface. Land covered with fresh snow has a high albedo (75-95%), most sunlight hitting the surface bounces back towards space. The average albedo of Earth is 30 - 35%. The sand desert has albedo 20-30%. Paddy cropland has albedo 3-15% and Prairie land has albedo 10-20%.
Ques: 2
Consider the following statements:
The annual range of temperature is greater in the Pacific Ocean than that in the Atlantic Ocean.
The annual range of temperature is greater in the Northern Hemisphere than that in the Southern Hemisphere.
Which of the statements given above is/are correct?
Correct Answer:
(B) 2 only
More the size of the ocean, less the variation in the annual temperature. Therefore, more temperature variation is found at the Atlantic Ocean as compared to the Pacific Ocean.
Ques: 3
Which of the following statements is not true:
Correct Answer:
(B) The zone of maximum temperature is located along the equator
The average, temperature decreases from the Equator towards the higher degree latitude. It may be noted that the highest temperature is never recorded at the Equator, instead, it is recorded at the 20° N. So, it can be said that the zone of maximum temperature is not located at the equator. Therefore, statement (b) is not correct, other statements are correct.
Ques: 4
Clear sky nights are cooler than cloudy sky nights due to
Correct Answer:
(B) radiation
The cloudy night contains more water vapour than a clear night. The heat emitted from the Earth’s surface is trapped by the clouds and emitted back towards the earth. As a result, cloudy night seems warmer than clear night. If the sky is clear, heat emitted from the Earth’s surface freely escapes into space, resulting in colder temperatures.
Ques: 5
1. Consider the following statements:
1. The incoming solar radiation on earth is known as insolation 2. The farthest distance of the earth from the Sun is 152 million Km on 4th July 3. The position of the earth when it is nearest to the Sun is called Aphelion
Select the correct answer using the code given below
Correct Answer:
(B) 1 and 2 only
The amount of solar radiation received by the surface of the earth is called insolation. The word insolation means incoming solar radiation. It consists of a bundle of rays of radient energy of different wavelengths.
During its revolution around the sun, the earth is farthest from the sun (152 million km) on 4th July. This position of the earth is called aphelion.
The Earth is closest to the Sun, or at the Perihelion, about 2 weeks after the December Solstice, when it is winter in the Northern Hemisphere.