Wind Currents

Q. Describe an experiment to show that air expands on heating.

Q. Wind currents are formed due to of earth.

1. uneven heating
2. gravity
3. uniform heating

Q. What causes convection currents in the air?

1. The revolution of the earth around the sun.
2. The rotation of earth around itself.
3. The heat on the surface of the earth.
4. The uneven shape of the earth.

Q. The _____ effect is due to the rotation of the Earth which causes deflection in the direction of winds blowing from the poles towards the equator.

1. Tyndall
2. Fleming
3. Coriolis
4. Lorrentz

Q. How does uneven heating between the equator and the poles generate wind currents? [3 MARKS]

Q.

Define wind.

Q.

Why is a ventilator provided in a room?

Q. Define convection

Q. What causes wind currents on the Earth?

1. Change in seasons.
2. Uneven heating between the equator and the poles.
3. Gravitational pull of the Sun.
4. Rotation of the Moon.

Q. Winds bend towards the in the northern hemisphere. They bend towards the in southern hemisphere.

1. right
2. forward
3. left
4. backward

Q.

As we move towards the earth atmosphere we get closer to the sun then why do they say that the temperature get lower as we move up

Q. What causes wind currents across the globe?

1. Change in seasons
2. Uneven heating between the equator and the poles
3. Rotation of the earth
4. Gravitational pull of the sun

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. north
2. west
3. south
4. east

Q. What do you mean by ventilation?How does convection currents help us during ventilation

Q.

Q-1 : Why are ventilators situated high up near the ceiling of a room ?

Q-2 : Why does smoke rise ?

Q-3 : What happens when we touch a cold metal spoon ? Why does it feel cold ? Explain

Q.

The factor/factors that is/are directly responsible for winds:

1. Coriolis force

2. gravitational force

3. The uneven heating by the Sun

4. Magnetic force

Q.

The process by which warm air goes out of a room from the top and cold air moves in from doors and windows naturally is called

1. air circulation

2. ventilation

3. air rotation

4. none of the above

Q.

What causes winds?

Q. Name an instrument to measure wind speed.
[1 mark]
[Lakhmir Singh]
[Cyclone]

Q. To expel hot air out of the kitchen, A has an exhaust fan fitted on the window of her kitchen and B has a similar exhaust fan fitted on the wall near the ceiling of her kitchen. Which of the exhaust fan will expel the hot air more effectively?

Q. To expel hot air out of the kitchen, ‘A’ has an exhaust fan fitted on the window of her kitchen and ‘B’ has a similar exhaust fan fitted on the wall near the ceiling of her kitchen. Which of the exhaust fan will expel the hot air more effectively? Explain why? [3 MARKS]

Q. The main cause of wind is uneven heating of Earth.

1. True
2. False

Q.

1. Pressure difference will be less

2. Pressure difference will be same as temperature and pollution has no relation with pressure.

3. None of these

4. Pressure difference will be high

Q. Which of the following statement is correct when we drink the water by straw?

1. Can't say anything about the pressure inside the straw.
2. The pressure inside the straw is more than atmospheric pressure.
3. The pressure inside the straw is less than atmospheric pressure.
4. The pressure inside the straw is equal to the atmospheric pressure.

Q. Convection currents are produced in my layer. Who am I -------

Q. What causes wind currents on the Earth?

1. Rotation of the Moon.
2. Change in seasons.
3. Uneven heating between the equator and the poles.
4. Gravitational pull of the Sun.

Q.

1. Pressure difference will be less

2. Pressure difference will be same as temperature and pollution has no relation with pressure.

3. Pressure difference will be high

4. None of these

Q.

Which of the following option correctly defines wind?

1. Humid air

2. Hot air

3. Moving air

4. Cold air

Q. Wind speed in a region depends on which of the following factors?

1. Humidity
2. Latitude/Longitude
3. Air pressure
4. Pollution

Q.

Winds are generated due to ________ heating on the earth.

1. even

2. either even or uneven

3. can't be said

4. uneven