Test: Wind & Storm - Class 7 MCQ

Wind is caused due to the differences in air pressure. Air moves from high pressure areas to low pressure areas, causing wind.

Hot air balloons rise due to the buoyancy of hot air. The air inside the balloon is heated using burners, which causes the air to expand and become less dense than the air outside. This difference in density causes the balloon to rise. In the past, hydrogen gas was used to fill the balloons, but now helium is used due to safety concerns.

Monsoons are seasonal winds that bring heavy rainfall to the Indian subcontinent. These winds blow from the southwest during the summer months and from the northeast during the winter months.

Air pressure is the force exerted by air on a surface. It is measured using a device called a barometer.

Thunderstorms are characterized by lightning and thunder. They are caused by the rapid upward movement of warm, moist air, which leads to the formation of cumulonimbus clouds.

A barometer is a device used to measure air pressure. It consists of a long glass tube filled with mercury, which rises or falls based on changes in air pressure.

Wind energy is the energy generated by wind turbines. Wind turbines convert the kinetic energy of wind into electrical energy.

Sea breeze is a type of wind that blows from the sea towards the land. It is caused by the temperature difference between the land and the sea.

Storms can cause a range of effects, such as flooding, landslides, and soil erosion. However, they do not cause reduced air pressure.

Lift is the force that keeps an object, such as an airplane or a bird, in the air. It is generated by the shape of the object and the movement of air around it.

A cyclone is a type of storm that forms over warm ocean waters. It is characterized by low air pressure at the center and high winds that spiral around it.

A tornado is a violent, rotating column of air that extends from a thunderstorm to the ground. It is characterized by high winds and can cause significant damage.

Wind plays an important role in pollination and seed dispersal for many plants. However, strong winds can also damage plants and cause them to lose leaves or branches.

An anemometer is a device used to measure wind speed. It consists of a set of cups that rotate in the wind, and the rotation is used to calculate wind speed.

During a cyclone, it is important to stay indoors and away from windows, evacuate to higher ground if possible, and keep emergency supplies on hand.

Cyclones are much larger than tornadoes and can cause damage over a much larger area. Tornadoes are smaller in size but can be very destructive.

Cyclones can cause strong winds and storm surges, which can lead to significant damage in coastal areas.

Tornadoes can cause damage to buildings in a variety of ways, including lifting roofs off buildings, shattering windows, and causing buildings to collapse.

Wind turbines are the main source of wind energy. They convert the kinetic energy of wind into electrical energy.

Winds play an important role in ocean currents and wave formation. They can cause the movement of water and create waves, which can have significant impacts on coastal areas.