Wind Currents Due to Uneven Heating of Land and Water

Q.

Why are ventilators provided near ceilings in the rooms of our houses?

Q.

What causes air movement from one place to another?

Q. Question 4
Why is it necessary to have a ventilator in a house? What will happen if there is no ventilator?

Q. Heat is a form of energy. Explain this statement with the help of an example.

Q. The winds coming from the sea contain more water vapour as compared to those blowing from land to sea. Why? [2 MARKS]

Q. I got a question in my class test.The question was:With the help of three examples, explain the movement of air.I wrote the answer as the following :

1. Sea breeze:When land gets heated, warm air rises and cold air from sea come towards the land. (The land here is a low pressure area. Sea is a high pressure area.This shoes that air moves from high pressure area to low pressure area.)
2. Air coming from poles towards equator:Equator area receive high heat from the sun. As a result, it becomes a low pressure area and rises up. The cold air from the polar regions come towards the equator . (Here, polar region is a region of high pressure.)
3. No winds at hill stations:On hill ststions, there will be no wind because there is high air pressure.Air moves from a region of high air pressure to low air pressure.So, there will not be any wind in hill stations.

Is this correct? If not, why not??

Q. Which of the following factors is the cause of sea breeze?

1. Convection currents
2. Cyclones
3. Conduction
4. Rains

Q.

Question 1 (b)
Fill the missing word in the blank spaces in the following statements:
(b) Winds are generated due to $\underset{–}{}$ heating on the earth.

Q.

Suggest two methods to find out wind direction at a given place.

Q.

How do convection currents in air help during ventilation?

Q. Heat is a form of energy. Explain this statement with the help of an example.

Q. Wind flows from a region of _______ pressure to a region of _______ pressure. [1 mark]

Q. Why are ventilators provided near ceilings in the rooms of our houses?

Q. Which of the given statements is correct?

1. Satellites help in predicting the path of cyclone.

2. The coastline of India is not vulnerable to cyclones.

3. During night, the winds flow from the ocean to the land.
4. During day, the winds flow from the land towards the ocean.

Q. What is the importance of Monsoon winds ?

1. They lower the temperature of areas where temperature is usually high.
2. None of the above
3. They clear up the sky and make atmosphere sunny.
4. They bring rain and play important role in water cycle.

Q.

The wind coming from the sea contain more water vapor as compared to those blowing from land to sea.

1. True

2. False

Q. How do convection currents help in ventilation of a room?

Q. What is the direction of Monsoon winds in Summer ?

1. From ocean towards the land
2. From land towards the ocean
3. From equator towards the poles
4. From poles towards the equator

Q. How are monsoon winds formed?

1. The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land, which gives rise to Monsoon winds.
2. The pressure difference in adjoining areas gives rise to air movement which leads to formation of Monsoon winds
3. Air that is warmed up near the Equator, moves towards each pole causing the Monsoon winds to blow.
4. None of the above

Q.

It is recommended that air conditioners and ventilators should be fixed near the _______________of a room.

Q.

Which of the following is/are the primary causes of cyclones?

1. High-speed winds

2. Pressure difference

3. High temperature

4. Both high-speed winds and pressure difference

Q. Define Ventilation of air.

Q. Sea breeze, a local wind system characterized by a flow from sea to land

1. During day
2. During night
3. Throughout day and night
4. None of these

Q. A house facing the sea in the north direction has some clothes hung in its balcony. The clothes will swing towards ______ in the afternoon.

1. east
2. north
3. west
4. south

Q. What is the air pressure at the sea level?

1. $4033.9g/cm-s^2$
2. $3013.6g/cm-s^2$
3. $2013.6g/cm-s^2$
4. $1013.9g/cm-s^2$

Q.

The winds coming from the sea contain more water vapor as compared to those blowing from land to sea.

1. True

2. False

Q. Which of the following area is created over land during land breeze?

1. High pressure
2. Low pressure
3. Low temperature
4. All of the above

Q. The sea breeze is caused due to the low pressure generated over

1. Land
2. Sea
3. Air
4. Both A and B

Q. A hot air balloon is drifting towards the sea. At what time of the day is this likely to be observed?

1. Morning
2. Evening
3. Afternoon
4. Night

Q. Land heats faster than the water.

1. True
2. False