Because warm air is lighter, it rises while cold air moves down to take the warm air's place.

Question

This circular movement of air is called a convection current. Where the air rises, there's
higher air pressure; where it falls, the pressure is low. Since cooling air can't hold as much
water vapor as warm air can, the result may be rain, whether as a simple summer
thunderstorm or a big hurricane.
A cyclone is a weather system where the air rushes into a low-pressure area, and winds
rotate inward in a counterclockwise direction. Cyclones can be very powerful and
destructive. A tornado is a very intense, small cyclone. As the very fast winds spiral inward
and upward they can pick up large objects like trees, trucks and even rooftops.
The most powerful storms of all are called hurricanes (in Asia they are called typhoons).
These huge cyclones can cover hundreds of square miles. Formed over warm tropical
oceans, hurricanes can have winds of more than 125 miles per hour. These storms can cause
incredible damage due to floods, waves, rain, and wind.
hurricane are?
not created by air masses.
formed over arctic oceans.
a kind of cyclone.
less powerful than tornadoes.

Answer 1

Hurricanes are a kind of cyclone. They are large storm systems that form over warm tropical oceans and are characterized by powerful winds, typically exceeding 125 miles per hour.

To clarify the other options:

• Hurricanes are created by air masses, particularly warm, moist air from tropical oceans.
• They are not formed over arctic oceans; instead, they require warm ocean waters to develop.
• Hurricanes are more powerful than tornadoes on a larger scale, although tornadoes can have much faster winds on a very localized level.