If you are looking for TN Board Class 8 Geography Unit 2 Weather and Climate extra que and ans, then you are at the right place.
Q: What is the difference between weather and climate?
A: Weather refers to the day-to-day conditions of the atmosphere in a place, while climate is the average weather conditions of a place over a long period, usually 35 years.
Q: What are the major elements of weather and climate?
A: The major elements of weather and climate are temperature, precipitation, pressure, humidity, and wind.
Q: How is temperature measured?
A: Temperature is measured using instruments like thermometers, Stevenson screens, and minimum and maximum thermometers.
Q: What are the three heat zones of the Earth?
A: The three heat zones of the Earth are the Torrid Zone, Temperate Zone, and Frigid Zone.
Q: How is air pressure measured?
A: Air pressure is measured using a barometer or aneroid barometer.
Q: What is humidity and how is it expressed?
A: Humidity refers to the amount of water vapor in the atmosphere. It can be expressed as specific humidity, absolute humidity, or relative humidity.
Q: What instrument is used to measure humidity?
A: Humidity is measured using a hygrometer.
Q: What are the three categories of wind systems?
A: The three categories of wind systems are planetary winds, seasonal winds, and local winds.
Q: How is wind direction measured?
A: Wind direction is measured using a wind vane or weather cock.
Q: What is the composition of Earth’s atmosphere?
A: Earth’s atmosphere contains about 78% nitrogen, 21% oxygen, 0.97% argon, 0.03% carbon dioxide, and 0.04% trace amounts of other gases and water vapor.
Q: What is the Beaufort scale used for?
A: The Beaufort scale is used for measuring wind speed based on observation rather than accurate measurement.
Q: What causes the differences in climate between Yuktha’s location in Tamil Nadu and Tiya’s in Auckland?
A: The differences are due to their locations in different hemispheres, resulting in opposite seasons and different weather conditions.
Q: What is an isobar?
A: An isobar is an imaginary line used to show the distribution of air pressure on weather maps.
Q: How is rainfall measured?
A: Rainfall is measured using a rain gauge.
Q: What is the standard air pressure at sea level?
A: The standard air pressure at sea level is 1013.25 mb.
Q: What is the lapse rate in the troposphere?
A: The lapse rate in the troposphere is 6.5 degrees Celsius per 1000 meters.
Q: Who developed the first climatic atlas of the world?
A: Al-Balakhi, an Arab Geographer, collected climatic data from Arab travelers and prepared the first climatic atlas of the world.
Q: What is the highest temperature ever recorded on Earth?
A: The highest temperature ever recorded on Earth is 56.7°C (134°F), recorded on July 10, 1913, at Greenland Ranch in Death Valley, California, USA.
Q: How do planetary winds differ from seasonal winds?
A: Planetary winds blow in the same direction throughout the year, while seasonal winds change direction according to the season.
Q: What is a wind rose used for?
A: A wind rose is a diagram used to depict the direction and periods (number of days) of prevailing winds on a map.
Q: What is the diurnal range of temperature?
A: The diurnal range of temperature is the difference between the maximum and minimum temperatures of a day.
Q: What are isotherms?
A: Isotherms are imaginary lines which connect places with the same temperatures on a map.
Q: Why does the Polar region experience extreme cold winters?
A: The Polar region receives slanting sun’s rays, resulting in little or no sunlight and extremely cold temperatures.
Q: What is insolation?
A: Insolation refers to the solar radiation that reaches the Earth’s surface.
Q: What is the dew point?
A: The dew point is the temperature at which the air becomes saturated and water vapor begins to condense.
Q: What are the three mechanisms through which the Earth receives heat energy from solar radiation?
A: The three mechanisms are radiation, conduction, and convection.
Q: What is the significance of the 100% relative humidity?
A: When relative humidity reaches 100%, the air is saturated and further cooling will condense water vapor into clouds and rain.
Q: What is a meteorograph?
A: A meteorograph, also known as a triple register, is an instrument that records wind speed and direction, sunshine, and precipitation.
Q: How does air pressure generally change with altitude?
A: Air pressure generally decreases with increasing altitude.
Q: What are trade winds?
A: Trade winds are a type of planetary wind that blow almost consistently in the same direction throughout the year.
Q: What is the lowest temperature ever recorded on Earth?
A: The lowest temperature ever recorded on Earth is −89.2°C (−128.6°F), recorded on July 21, 1983, at the Soviet Vostok Station in Antarctica.
Q: What are monsoon winds?
A: Monsoon winds are seasonal winds that change their direction according to the season, blowing from sea to land during summer and land to sea during winter.
Q: How does temperature generally vary from the equator to the poles?
A: Generally, temperature is highest near the equator and decreases gradually towards the poles.
Q: What is the difference between low pressure and high pressure areas?
A: In low pressure areas, wind blows towards the center, while in high pressure areas, wind blows outwards from the center.
Q: What is the origin of the word “climate”?
A: The word “climate” is derived from the ancient Greek word “Klimo,” which means “inclination.”
Q: What is the study of weather called?
A: The scientific study of weather is called meteorology.
Q: What is climatology?
A: Climatology is the scientific study of climate.
Q: Why do aircraft create artificial pressure in the cabin?
A: Aircraft create artificial pressure in the cabin to keep passengers comfortable, as the air pressure and oxygen levels decrease at high altitudes.
Q: What are some of the least windy places on Earth?
A: Some of the least windy places on Earth include parts of Brazil, Gabon, Congo, DR Congo in Africa, and Sumatra, Indonesia, and Malaysia.
Q: What is decompression sickness?
A: Decompression sickness can occur when people move quickly from high pressure to low pressure environments, such as ascending to high altitudes too rapidly.
