Humidity in Atmosphere — Flashcards
Gujarat Board · Class 11 · Geography
24 flashcards for Humidity in Atmosphere (Gujarat Board Class 11 Geography) to test yourself on key terms and facts.
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What are the three physical forms of water in the atmosphere?
Answer
Water exists in three forms in the atmosphere: 1. Gaseous form - Water vapour near Earth's surface 2. Liquid form - Water drops in clouds at medium or low altitudes 3. Solid form - Snow particles in c…
Define Absolute Humidity.
Answer
Absolute Humidity is the actual amount of moisture present in a given volume of air at any given time. It changes with place and time, being maximum over the equator and minimum over the poles.
What is the formula for calculating Relative Humidity?
Answer
Relative Humidity = (Moisture present in specific volume of air at specific temperature / Saturation capacity of the same volume of air at the same temperature) × 100 It is measured in percentage (%)…
What is evaporation and what factors affect its intensity?
Answer
Evaporation is the process in which water turns into vapour due to solar heat. Factors affecting evaporation intensity: 1. Temperature - Higher temperature increases evaporation 2. Aridity of air - …
What is dew and under what conditions does it form?
Answer
Dew forms when water vapour near Earth's surface condenses into drops over cold surfaces. Favourable conditions: - Sufficient water vapour - Clear sky - Calm weather - Longer winter nights - Land coo…
How is frost different from dew?
Answer
Frost forms under similar conditions as dew, but when the surface temperature falls below freezing point (0°C), water vapour condenses into snow crystals instead of water drops. Frost can damage crop…
What is fog and how does it affect transportation?
Answer
Fog is condensation near Earth's surface forming minute water or snow particles that float in air, creating a cloud-like shape. Effects on transportation: - Reduces visibility - Creates obstacles for…
Describe Cirrus clouds and their characteristics.
Answer
Cirrus Clouds: - Found at altitude of 10 km or more - Made of minute icy crystals - Appear white-silver in sunlight, coloured at sunset - Scattered feather-like appearance indicates good weather - Reg…
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