21.On Monday the 14th June a man crosses the International Date Line at 5 p.m. from the Asian side to the American side. Which of the following will he now assume to be the correct date and time ?

22.Which of the following planets is known as Morning Star ?

23.Choose the incorrect statement :

24.The point in the orbit of a moon that is farthest from the Earth and at which the moon s velocity is at a minimum, is known as

25.The incoming short -wave solar radiation is balanced by an equal amont of long - wave radiation from Earth going back to space. This is known as