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The Lehmann discontinuity is within the Earth's inner core.
- True
- False
Answer: True
The Lehmann discontinuity, at about 5,150 km depth, marks the boundary between Earth's liquid outer core and solid inner core. Named after seismologist Inge Lehmann, who discovered the inner core in 1936 through seismic wave analysis.
The Vindhya Range separates North and South India.
- True
- False
Answer: True
The Vindhya Range traditionally marks the boundary between North and South India. It runs east-west across central India, parallel to the Satpura Range. The Narmada River flows in the rift valley between these two ranges.
The Suez Canal is located in Egypt.
- True
- False
Answer: True
The Suez Canal is located in Egypt, connecting the Mediterranean Sea to the Red Sea. Opened in 1869, it is a vital shipping route that saves vessels from navigating around Africa. The canal was nationalized by Egypt in 1956.
India is the largest producer of turmeric in the world.
- True
- False
Answer: True
India is the largest producer, consumer, and exporter of turmeric globally, contributing about 80% of world production. Major turmeric-growing states are Telangana, Andhra Pradesh, and Tamil Nadu. Turmeric is valued for its medicinal and culinary properties.
The Indian Standard Time is based on 82.5°E longitude.
- True
- False
Answer: True
Indian Standard Time (IST) is based on the 82.5°E longitude passing through Mirzapur near Prayagraj, Uttar Pradesh. IST is 5 hours 30 minutes ahead of GMT. This single time zone is used across India despite its east-west span.
The Ring of Fire is associated with volcanic and seismic activity.
- True
- False
Answer: True
The Pacific Ring of Fire is a horseshoe-shaped zone around the Pacific Ocean characterized by frequent earthquakes and volcanic eruptions. It results from tectonic plate boundaries. About 90% of earthquakes and 75% of active volcanoes occur here.
The Chota Nagpur Plateau is rich in mineral resources.
- True
- False
Answer: True
The Chota Nagpur Plateau, spanning Jharkhand, Odisha, and Chhattisgarh, is rich in minerals like coal, iron ore, mica, and bauxite. It is known as the 'Ruhr of India' due to its industrial significance. Major cities include Ranchi and Jamshedpur.
The Bering Strait separates Russia and the USA.
- True
- False
Answer: True
The Bering Strait separates Russia (Siberia) and the USA (Alaska), connecting the Arctic Ocean to the Bering Sea. It is about 85 km wide at its narrowest. The Diomede Islands lie in the strait, with one belonging to each country.
India is the largest producer of ginger in the world.
- True
- False
Answer: True
India is the largest producer of ginger globally, contributing about 40% of world production. Major ginger-growing states include Kerala, Karnataka, and Odisha. Ginger is used in food, medicine, and beverages.
India is located entirely in the Northern and Eastern Hemispheres.
- True
- False
Answer: True
India lies entirely in the Northern Hemisphere (8°4'N to 37°6'N) and Eastern Hemisphere (68°7'E to 97°25'E). This geographical position gives India a strategic location in the Indian Ocean region for trade and security.
The Gutenberg discontinuity separates the mantle and core.
- True
- False
Answer: True
The Gutenberg discontinuity, at about 2,900 km depth, marks the boundary between Earth's mantle and outer core. It is characterized by a sudden drop in seismic wave velocity. Named after seismologist Beno Gutenberg.
The Malwa Plateau is located in central India.
- True
- False
Answer: True
The Malwa Plateau is located in central India, primarily in Madhya Pradesh and parts of Rajasthan. It is bounded by the Aravallis to the northwest and the Vindhyas to the south. The plateau is known for black soil and agriculture.
The Antarctic Circle is located at 66.5° South latitude.
- True
- False
Answer: True
The Antarctic Circle is located at approximately 66.5° South latitude. It marks the southernmost latitude where the Sun can remain continuously above or below the horizon for 24 hours (midnight sun/polar night).
India is the largest producer of chickpeas (chana) in the world.
- True
- False
Answer: True
India is the largest producer and consumer of chickpeas (chana), contributing about 70% of global production. Major producing states are Madhya Pradesh, Maharashtra, and Rajasthan. Chickpeas are a key Rabi pulse crop rich in protein.
The Indo-Gangetic Plain is formed by alluvial deposits.
- True
- False
Answer: True
The Indo-Gangetic Plain is formed by alluvial deposits brought by the Indus, Ganga, and Brahmaputra river systems. It is one of the world's most fertile regions, supporting intensive agriculture. The plain stretches from Punjab to Assam.
Red soil gets its color from iron oxide.
- True
- False
Answer: True
Red soil gets its characteristic red color from iron oxide (ferric oxide) content. It is found in Tamil Nadu, Karnataka, Andhra Pradesh, and Odisha. Red soil is suitable for crops like millets, pulses, and oilseeds but is low in nitrogen and phosphorus.
The mesosphere is the coldest layer of the atmosphere.
- True
- False
Answer: True
The mesosphere (50-85 km altitude) is the coldest atmospheric layer, with temperatures dropping to -90°C. Meteors burn up in this layer due to friction. Above it lies the thermosphere, where temperatures rise due to solar radiation absorption.
The Tropic of Capricorn passes through Australia.
- True
- False
Answer: True
The Tropic of Capricorn (23.5°S) passes through Australia, dividing it into tropical and temperate zones. It also passes through South America, Africa, and the Indian Ocean. The line marks the southernmost point where the Sun can be directly overhead.
Cyclones in the Bay of Bengal are more frequent than in the Arabian Sea.
- True
- False
Answer: True
The Bay of Bengal experiences about 4-5 times more cyclones than the Arabian Sea due to warmer sea surface temperatures, higher humidity, and favorable atmospheric conditions. This makes eastern India more vulnerable to cyclonic storms.
The International Date Line passes through the Pacific Ocean.
- True
- False
Answer: True
The International Date Line (approximately 180° longitude) passes through the Pacific Ocean. It deviates around landmasses to avoid splitting countries. Crossing it eastward subtracts a day; westward adds a day.