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Practice these Understanding the Weather questions for Class 7 Social Studies, each with the correct answer and a step-by-step explanation. Sign up free to practice all 27+ questions with adaptive difficulty.
Explanation: Atmospheric pressure is measured using a barometer, which detects changes in air pressure caused by weather systems. This is essential for predicting storms and cyclones, as low-pressure systems often indicate impending bad weather.
Explanation: Precipitation refers to any form of water falling from the sky, such as rain, snow, sleet, or hail. Fog, on the other hand, is a suspension of tiny water droplets or ice crystals in the air and does not fall to the ground.
Explanation: Automated Weather Stations (AWS) are designed to collect and transmit weather data automatically. They provide real-time monitoring of various weather elements, which helps in making accurate forecasts and preparing for potential disasters.
Explanation: At higher altitudes, atmospheric pressure decreases, leading to thinner air with less oxygen. This reduction in oxygen can cause people to feel breathless, dizzy, or tired as their bodies struggle to get enough oxygen.
Explanation: The motto highlights the connection between solar energy and the process of evaporation, which leads to cloud formation and ultimately rain. It reflects the ancient understanding of how weather phenomena are interconnected with solar activity.
Explanation: Atmospheric pressure is measured using a barometer. This instrument is crucial for predicting weather changes, especially storms and cyclones, as it detects variations in air pressure.
Explanation: The troposphere is the lowest layer of Earth’s atmosphere and is where weather phenomena like rain, snow, and storms take place. It extends up to about 10-15 kilometers from the Earth’s surface.
Explanation: An anemometer measures wind speed by detecting the rotation of its cups or blades, which is directly proportional to the wind’s velocity. This is essential for aviation, agriculture, and weather forecasting.
Explanation: A hygrometer measures the amount of water vapor in the air, expressed as relative humidity. This helps in understanding weather conditions, especially for predicting rain or fog.
Explanation: The normal atmospheric pressure at sea level is around 1013 millibars. A drop below 1000 millibars often indicates an approaching storm or cyclone.
Explanation: Precipitation refers to any form of water falling from the sky, such as rain, snow, sleet, or hail. Fog is a suspension of water droplets in the air and does not fall to the ground.
Explanation: Automated Weather Stations (AWS) provide continuous data on weather conditions, such as temperature, humidity, and wind speed, which are essential for accurate weather forecasting and disaster preparedness.
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