E. Answer the following questions in brief.
1. What is wind? What causes it?
2. How does an air current set up between two regions?
3. Differentiate between summer monsoon winds and winter monsoon winds.
4. How does air pressure help to inflate a football?
5. List the factors affecting air pressure.
6. Why does air pressure increase in humid conditions?
7. Why does high-speed wind results in reduced pressure?
8. How does moving air produce a lift?
9. Which instrument is used to measure wind direction? How does it work?
Answers
Answer:
1. Wind is the flow of gases on a large scale. On the surface of the Earth, wind .consists of the bulk on the surface the earth.The wind is caused by differences in atmospheric pressure.
2. The air current are concentrated areas of wind found between the air layers. These air currents are formed due to influence of temperature and pressure. ... The vertically upwards movement of the air happens in the form of convergence and divergence at the different layer of the atmosphere.
3. The summer monsoon generally begins in April and lasts through late September, while the winter monsoon arrives in October and ends in March. ... Winter monsoons are usually less powerful than summer monsoons and may bring high winds in addition to drier air.
4. When air is blown in the balloon then air pressure exert on the walls of balloon due to which a force act on the walls of balloon and it push the wall outwards due to which balloon expands.
5. Temperature of air. Altitude or Elevation. Moisture.
6. As humidity increases pressure decreases. Since water vapor is less dense than dry air if both have the same temperature, the addition of water vapor decreases the overall density of the air and lowers its pressure
7. As humidity increases pressure decreases. Since water vapor is less dense than dry air if both have the same temperature, the addition of water vapor decreases the overall density of the air and lowers its pressure.
8. An airfoil generates lift by exerting a downward force on the air as it flows past. According to Newton's third law, the air must exert an equal and opposite (upward) force on the airfoil, which is lift. The airflow changes direction as it passes the airfoil and follows a path that is curved downward.
9. windvane. How does it work?
A wind vane, also called a weather vane, is a tool for measuring wind direction and was probably one of the first weather instruments ever used. ... The arrow will point to the direction the wind is blowing from so if it is pointing to the east, it means the wind is coming from the east
Explanation:
Answer:
how does the wind originate