7Class Science Air winds and Cyclones

Air exerts

• Cooling
• Heating
• Rain
• Pressure

Air expands on

• Cooling
• Heating
• itself
• No answer

Hot air is

• More dense
• Less dense
• No density
• No answer

This part of the globe gets more heat from the sun

• Polar region
• Between poles and Equator
• Near Equator
• Between arctic circle and Pole

Tropical cyclones are like

• Giant engines
• Friendly army
• Enemies
• Friends

Most cyclones tend to occur towards

• Indian ocean
• Pacific Ocean
• Arabina Sea
• Bay of Bengal

The other name of cyclones is

• Typhoons
• Hurricanes
• Cyclones
• Typhoons, Hurricanes

Cyclone watch is issued in advance of

• 24 hours
• 36 hours
• 48 hours
• 60 hours

The instrument that measures wind speed is

• Anemometer
• Spherometer
• Speedometer
• Barometer

In India cyclone usually occur in

• January
• April
• May - June
• December