Question Text
Question 6 :
The water vapour which enters into air to form clouds in the sky are obtained by which of the following process?
Question 9 :
A considerable part of harmful ultraviolet radiation from the sun does not reach the surface of the earth. This is because high above the earth's atmosphere is a layer of_________<br/>
Question 10 :
The allotrope of this element is the primary absorber of UV solar radiation in Earth's atmosphere. What element is this?
Question 15 :
The average temperature of the earth's atmosphere is gradually increasing. This is due to:
Question 16 :
Which of the following phenomena take place when the top layer of soil is exposed?
Question 17 :
Paheli asked for a glass of water from Boojho. He gave her a glass of ice-cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho how these droplets of water were formed? Which of the following should be Boojhos answer?
Question 24 :
Freon is not recommended to be used in refrigerators because they:
Question 29 :
Which one of the following factors does not lead to soil formation in nature?
Question 33 :
Among the given options, which one is not correct for the use of large amount of fertilizers and pesticides?
Question 34 :
To prevent soil erosion, a farmer plants a hedge across a field. This method works because
Question 37 :
Removal of the soil by the action of wind and water is known as
Question 40 :
The soil near the surface is usually darker than about one meter down, this is because the top soil