Science MCQ (1 Marks)

Air expands on heating. As hot air expands, its density decreases and it becomes lighter and rises up in atmosphere.

The wind energy comes from the blow of wind. See breeze and land breeze together constitute the wind energy.

The eye is a region of mostly calm weather at the centre of strong tropical cyclones. In all storms, however, the eye is the location of the storm's minimum barometric pressure where the atmospheric pressure at sea level is the lowest.

Cyclones are called hurricanes in American continent and typhoons in Philippines and japan.

We know that increased wind speed is accompanied by reduced air pressure. Hence, the region inside the house, where there is no wind will be at a higher pressure.

Coriolis Effect.

Advanced Technology like satellites and radars, helps to issue cyclone warning in advance as they are continuously monitoring Earth from above and urgent messages can be broadcast to disaster-affected people via television and radio, these are the roles that advanced technology plays.

Sea breeze.

Anemometer.

A thunderstorm, also known as an electrical storm or a lightning storm, is a storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere, known as thunder.

The air pressure inside the bottle is more than that at the mouth.

Because a car or a bus is a safe place to take shelter in such a situation.

The uneven heating of the air takes place due to the greater intensity of sunlight at the equator as compared to that of poles. The equator receives the sunlight directly and hence gets heated up easily. But the sunlight reaches the pole obliquely and hence causes less heating of the land.

Mausam.

During a thunderstorm, lightning is seen first and thunder is heard later on because light travels faster than sound. Lightning always comes with thunder. If you see a lightning flash but cannot hear any thunder, the thunderstorm is most likely be quite far away from you. The thunderclap must have been deflected up the sky. The longer the sound travels, the more it will be deflected away from the ground.

Cyclones can be very destructive. Strong winds push water towards the shore even if the storm is hundreds of kilometers away. These are the first indications of an approaching cyclone. The water waves produced by the wind are so powerful that a person cannot overcome them.

The uneven heating of the air takes place due to the greater intensity of sunlight at the equator as compared to that of poles. The equator receives the sunlight directly and hence gets heated up easily. But the sunlight reaches the pole obliquely and hence causes less heating of the land.

If a strong wind blows along the corridor, then the air pressure there increases and the curtain gets pushed outside the room.

Hence, all these factors are associated with cyclones.

The warm air is heavier than cold air.

More.

Cyclones can be very destructive. Strong winds push water towards the shore even if the storm is hundreds of kilometres away. These are the first indications of an approaching cyclone.

We know when there is difference in atmospheric pressure, air moves from the higher to the lower pressure area, resulting in winds of various speeds. Hence during a cyclone, air moves from region of high pressure to low pressure.

Take shelter under isolated tree.

A cyclone is known by different names in different parts of the world. It is called a ‘hurricane’ in the American continent. In Philippines and Japan it is called a ‘typhoon’.

Decreases.

We know air flows from region of higher pressure to region of lower pressure.
As the pressure of an area reduces, wind speed increases because air from surrounding region of high pressure flow to this region of low pressure.
Thus, High speed winds at a place are due to reduced air pressure at that location.

On heating, the fluid expands and occupies more space. When the same amount of fluid occupies more space, it becomes lighter. The warmer fluid is, therefore, lighter than the colder fluid.

Cyclone is an intense circular storm formed due to the formation of low atmospheric pressure center, strong winds etc. and results in heavy rain.
Coastal areas are most prone to Cyclones. Among the given options, Amritsar doesn't have a coast. So, it unlikely to be affected by a cyclone.

As air exerts pressure, it is easier to row a boat along the direction of wind.

High speed winds are accompanied by reduced air pressure.

Tropical climate.

An anemometer is a device used for measuring wind speed and direction. It is also 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 instrument used in meteorology.

The eye of a cyclone is a calm area because above the eye, the sky is clear, winds are relatively light, and the strong surface winds that converge towards the center never reach it.

An anemometer is a device used for measuring wind speed and direction. It is also 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 instrument used in meteorology.

Pressure inside the can is less than that outside.

Exhaust fans are used to expel excess smoke and heat being generated while cooking in the kitchen. As smoke and hot air rise up in the air fast, exhaust fan should be set up on the top part of the window.