Air Pressure

Q. Answer the following questions related to atmospheric pressure.
(i) What is atmospheric pressure?
(ii) Name the instrument used for measuring atmospheric pressure.
(iii) How do altitude, temperature and humidity influence atmospheric pressure?

Q.

State the forecast when barometric pressure does not change.

Q. What is the relative humidity for a saturated air?

1. 0%
2. 33%
3. 50%
4. 100%

Q. Air molecules are not in a constant state of collision.

1. True
2. False

Q. Which instrument is used to measure Earth's air pressure ?

1. Barometer
2. Thermometer
3. Micrometer
4. Gaugemeter

Q. Which of the following does not happen when you blow air into a balloon?

1. More air molecules get packed into a smaller space
2. The air molecules reduce the air pressure operating on the walls of the balloon
3. The air molecules start exerting pressure on the walls of the balloon
4. Air pressure changes inside the balloon

Q.

1. Wind is __ air.
2. How is the wind measured??

Q. Which of the following instruments is used to measure the air pressure of an area?

1. Thermometer
2. Barometer
3. Hygrometer
4. Hydrometer