Question

Weather is predicted by considering ______.

• A. Movement of air
• B. Amount of water vapour
• C. Temperature
• D. All the above

Answer 1

The correct option is D All the above

• Accurate weather prediction can be made only if all the air measurements i.e. temperature, humidity, and wind direction are considered.
• Moving air is known as the wind which is caused by differences in air pressure. It is the air that moves from an area of high pressure to an area of low pressure and causes day-to-day changes in weather. Thus the wind brings in different air masses and different weather patterns. The greater the difference in air pressure, the greater is the wind speed.
• The amount of water vapour present in the atmosphere is known as humidity. The measure of the water vapour present in the atmosphere as compared to vapour content at saturation levels is known as relative humidity. The formation of clouds and rain occurs only at 100% relative humidity and not near the surface. The rising and cooling air forms clouds and increases humidity. The fall of precipitation from the clouds occurs into layers with lower humidity.
• The measure of air's hotness and coldness is known as temperature. Temperature affects the type of precipitation that can form. If the atmospheric conditions are such that precipitation can occur and the temperature is above freezing then rain occurs. If the temperature is below freezing then, snow formation occurs.

Thus, the correct answer is option D.