Social Science : Geography
ATMOSPHERE
IV. Give Reason
1. Cyclones cause huge loss of
life and property.
Because,
• Cyclones are centres of low pressure where, winds from the
surrounding high pressure area coverage towards the centre in spiral form.
Tropical cyclones often cause heavy loss of life and property on the coasts.
• During cyclones if the speed of the winds and the height of
the tidal waves increase the destruction will be massive.
2. Cloudy days are warmer than
cloudless days.
Because,
• A Visible mass of condensed water vapour floating in the air
above the ground level is called a cloud.
• This condensed water reduced the heat.
3. Fog is dangerous for traffic.
Because,
• Light cannot travels through fog. The fog reduces the
visibility.
4. Convectional rainfall is also
called 4'o clock rain.
Because,
• Convectional rainfall occurs regularly in the equatorial region
in the evening around 4 o' clock.
5. Polar Easterlies are cold and
dry. Why is it so?
Polar Easterlies
are cold and dry
Because,
• Polar Easterlies blow from the polar high pressure belt to the
sub polar low pressure belt.
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