Multiple choice questionsA. Choose the correct option.Air exerts pressurea) downwardsc) upwardsb) sidewaysd) in all directionsA tin roof may blow off when wind speedsare high because ofa) high pressure due to high wind speedb)low pressure due to low wind speedc) low pressure due to high wind speedd) excessive rainfallIf a region is heated up more than itssurroundings, aa) low pressure area b) high pressure areac) monsoondevelops above it.d) liftDuring a thunderstorm,a) lightning is followed by thunderb) only thunder occursc) thunder is followed by lightningd) thunder and lightning occur separatelyWhich of these is seen only in a tornado?

Multiple choice questionsA. Choose the correct option.Air exerts press

1.	Multiple choice questionsA. Choose the correct option.Air exerts pressurea) downwardsc) upwardsb) sidewaysd) in all directionsA tin roof may blow off when wind speedsare high because ofa) high pressure due to high wind speedb)low pressure due to low wind speedc) low pressure due to high wind speedd) excessive rainfallIf a region is heated up more than itssurroundings, aa) low pressure area b) high pressure areac) monsoondevelops above it.d) liftDuring a thunderstorm,a) lightning is followed by thunderb) only thunder occursc) thunder is followed by lightningd) thunder and lightning occur separatelyWhich of these is seen only in a tornado?
Answer» <p>1) air exerts pressure in all directions.</p><p>2)When the velocity of thewindis great enough, the air pressure above the surface is lower compared to that underneath. This cause therooftoblow off. The aeroplane work in the same principle (lower pressure on top surface)hence option (c)</p><p>3) option(a)If a region is heated more than its surrounding a low pressure area develops above it.</p><p>4) option (a) We see the lightning before we hear the thunderbecause light travels faster than sound. The light from thelightningtravels to our eyes much quicker than the sound from thelightning.</p>