Answer: Option A. -> Anemometer
:
A

An anemometer is a device used for measuring wind speed and is a common weather station instrument. The term is derived from the Greek word anemos, which means wind, and is used to describe any wind speed measurement instrument used in meteorology.
Barometer measures pressure.
Thermometer measures temperature.
Ammeter measures electric current.

Answer: Option A. -> True
:
A

The density of warm air is lesser than cold air. On heating, air expands and its density decreases.

Answer: Option B. -> To decrease the air pressure difference between the two faces of hoardings.
:
B
In windy conditions, the air pressure difference over the two faces of a hoarding can create a massive force. This force can easily topple or destroy the huge hoardings. Holes in the material allows the wind to pass through which greatly reduces the overall pressure difference on the structure.

Answer: Option A. -> High-speed winds
:
A and B

Cyclones are caused around a low-pressure area distinguished by swift and often destructive air circulation. Therefore both high-speed winds and pressure difference are the primary characteristics of cyclones.

Answer: Option C. -> Satellites help in predicting the path of cyclone.
:
C
During night, the winds flow from the land to ocean and this is known as land breeze. During daytime, the winds flow from the ocean to land and this is known as  sea breeze.
Satellite images help to predict the path of cyclone to some extent. The whole system of clouds and winds spinning at high speed is captued by satellites.
The coastline of India is vulnerable to cyclones as cyclones form over the sea.

Answer: Option B. -> typhoon
:
B

A cyclone is also called as typhoon in Philippines and Japan.
It is called hurricane in the American continent. 
Tornadoes are also circular winds but they are much faster and narrower than cyclones.
Thunderstorm is not a cyclones rather it is a storm with thunder and lightning.

Answer: Option C. -> 300 km/hr
:
C

A tornado is a violently rotating column of air that is in contact with both the surface of the earth and a cloud, or in rare cases, the base of a cloud. It travels at a speed of about 300 km/hr.

Answer: Option A. -> satellite
:
A
Satellite images helps us to predict cyclonic path. The use of satellites in disaster management is becoming more integral in reducing reaction time and providing accurate information for rescue and disaster control operations. Satellites are used in disasters for communications, remote sensing and mapping. Meteorological and storm warning satellite technology can help in predicting disasters and setting up precautionary activities.

Answer: Option A. -> hurricane
:
A

A cyclone is also called as hurricane in the American continent. 
Typhoon is a name for tropical cyclones in Japan regions.
Tornadoes are also circular winds but they are much faster and narrower than cyclones.
Thunderstorm is not a cyclones rather it is a storm with thunder and lightning.

Answer: Option C. -> Follow the eye of the cyclone.
:
C
In case of a cyclone, one should listen to the warnings issued by the meteorological department through TV, radio, or newspapers. Driving through waterlogged roads should be avoided, as floods may have damaged the roads. It is safe to stay in the house and not move outside. In case of a cyclone, do not drink river or lake water as the water can be contaminated, therefore better to store drinking water.