Question

III. State true or false against each of the following statements. (1) Air expands on heating. (2) The speed of the wind is measure by hygrometer, (5) Humidity is not an element of weather.​

Answer 1

ANSWER :

1. TRUE
2. FALSE
3. TRUE

EXPLANATION :

1. As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.
2. An anemometer also measures wind, but it measures the speed of the wind. This instrument has three cups connected to rods, which rotate on one center rod. Wind speed is measured in miles per hour. A hygrometer is another instrument used to measure weather.
3. Temperature, humidity, and rainfall are the elements of weather