Daily Current Affairs 2025  

CA-27/01/2026


Contents
1. Chatergala Pass
2. Phuket Deep Sea Port
3. Deep Ocean Mission
4. New criminal laws Tableaus in Republic day parade
5. European Commission and European Council
6. India- EU Security and Defence Partnership
7. India- EU Free Trade Agreement
8. Schizophrenia
9. Radioactive Decay
10. Ashoka Chakra gallantry award
11. Palaeoclimatology
 
 
Chatergala Pass
 
Why in news?
Recently, Chatergala Pass was in the news because the Border Roads Organisation (BRO) cleared 5–6 feet of snow in a 40-hour operation, reopening the route and rescuing stranded civilians and soldiers.
 

Location & Geography
  • Altitude: ~10,500 feet (3,200 meters).
  • Region: Bhaderwah–Chatergala axis, Jammu region, Union Territory of Jammu & Kashmir.
  • Connectivity: Links Bani (Kathua district) with Bhaderwah (Doda district).
  • Mountain Range: Part of the Chamba–Doda ranges of the Greater Himalayas.
Importance of Chatergala Pass
  • Strategic Value: Provides a shorter link between Bhaderwah and Kathua, reducing travel time compared to traditional routes.
  • Tourism Potential: Offers panoramic Himalayan views, making it attractive for trekkers and adventure travelers.
  • Military Significance: Serves as a vital axis for troop movement and logistics in high-altitude areas.
 
 
 
Phuket Deep Sea Port
 
Why in news?
Phuket Deep Sea Port has undergone significant expansions to boost tourism and handle larger vessels. Recent developments include a new cruise terminal at Ao Makham Port, fully operational by mid-2025, enabling direct berthing for big ships.​
 

About Phuket Deep Sea Port
Phuket Deep Sea Port (Ao Makham) is the main gateway for cruise ships and cargo vessels in Phuket, Thailand, located about 7 km southeast of Phuket Town. It serves both international cruise liners and commercial shipping, with modern berthing facilities and easy access to the island’s tourist attractions.
 

Cruise & Passenger Services
  • Officially known as Phuket Deep Sea Port at Ao Makham.
  • Welcomes thousands of cruise travelers annually, making it a hub for tourism.
  • Commonly used for shore excursions to beaches, cultural landmarks, and city tours.
Key Considerations
  • Cruise Travelers: Expect shuttle buses or taxis to Phuket Town and Patong Beach.
  • Cargo Operations: The port also handles freight, making it a dual-purpose facility.
  • Tourism Link: Close to major attractions like Old Phuket Town, Wat Chalong, and beaches.
Risks & Limitations
  • Traffic Congestion: During peak cruise arrivals, expect delays in transport.
  • Limited Passenger Amenities: Compared to larger international cruise terminals, facilities are basic.
  • Weather Dependency: Operations may be affected by monsoon season (May–October).
 
 
 
Deep Ocean Mission
 
Why in news?
In January 2026, scientists involved in DOM were honored at the Republic Day Parade, highlighting its national importance.
 

About Deep Ocean Mission
Deep Ocean Mission (DOM), launched in 2021, is a flagship initiative of Ministry of Earth Sciences (MoES) to explore and harness ocean resources sustainably, strengthen the Blue Economy, and develop advanced technologies like the manned submersible MATSYA 6000.
  • Objective: To explore deep-sea resources, develop technologies for ocean exploration, and boost India’s Blue Economy.
  • It is part of the UN’s Decade of Ocean Science for Sustainable Development (2021–2030).
Key Components
  1. Samudrayaan Project
    • Development of MATSYA 6000, India’s first manned submersible capable of diving up to 6,000 meters.
    • In August 2025, Indian aquanauts achieved a 5,000 m deep dive, marking a historic milestone.
  2. Deep-Sea Mining & Resource Exploration
    • Focus on polymetallic nodules containing nickel, cobalt, copper, and manganese.
    • Potential to reduce import dependence for critical minerals.
  3. Marine Biotechnology
    • Research on marine organisms for pharmaceuticals, nutraceuticals, and industrial applications.
    • Example: Mumbai University received β‚Ή71.74 lakh funding for bio-prospecting marine microalgae for skincare and omega-3 products.
  4. Ocean Climate Studies
    • Advanced modeling to understand ocean’s role in climate regulation and monsoon prediction.
  5. Technology Development
    • Innovations in underwater robotics, sensors, and autonomous vehicles for exploration.
Importance for India
  • Economic: Supports fisheries, aquaculture, tourism, and mineral extraction.
  • Strategic: Enhances India’s maritime capabilities, crucial given its 7,517 km coastline and 1,382 islands.
  • Scientific: Positions India alongside nations like the USA, Russia, China, France, and Japan that have achieved deep-ocean crewed missions.
Challenges
  • Technological Risks: Extreme pressure and darkness at 6,000 m depth demand cutting-edge engineering.
  • Environmental Concerns: Deep-sea mining could disrupt fragile ecosystems.
  • High Costs: Requires sustained funding and global collaboration.
 
 

 
New criminal laws Tableaus in Republic day parade
 
Why in news?
The Ministry of Home Affairs (MHA) featured a prominent tableau at India's 77th Republic Day parade on January 26, 2026, highlighting the three new criminal laws. This display emphasized their nationwide implementation and tech-driven reforms.
 

Republic Day 2026 Tableau Highlights
  • Theme: India’s most significant criminal law reform in over a century.
  • Focus Areas:
    • Tech-driven justice system – digital evidence, e-courts, and faster trials.
    • Citizen-centric reforms – victim support, rights protection, and simplified procedures.
    • Modernization – replacing colonial laws (IPC, CrPC, Evidence Act) with updated frameworks.
The Three New Criminal Laws
Law Replaces Key Features
Bharatiya Nyaya Sanhita (BNS) Indian Penal Code (IPC) Defines modern crimes, emphasizes victim rights, stricter punishments for organized crime & terrorism.
Bharatiya Nagarik Suraksha Sanhita (BNSS) Code of Criminal Procedure (CrPC) Streamlines investigation & trial processes, promotes speedy justice, integrates technology in policing.
Bharatiya Sakshya Adhiniyam (BSA) Indian Evidence Act Recognizes digital evidence, modernizes admissibility rules, strengthens transparency in trials.
 
Importance
  • Historic Reform: First major overhaul of India’s criminal justice system since independence.
  • Citizen Empowerment: Laws aim to make justice more accessible, faster, and fairer.
  • Symbolism in Tableau: By placing the new laws atop Parliament, the tableau reinforced India’s sovereignty and departure from colonial legacies.
 

 
European Commission and European Council
 
Why in news?
The European Commission and European Council recently advanced key agreements on external funding and energy security. These developments reflect ongoing EU efforts to strengthen global partnerships and reduce reliance on Russian energy.
 

Strengthening External Funding (NDICI–Global Europe)
  • NDICI–Global Europe Program: This is the EU’s main financial instrument for external action, covering development aid, neighborhood policy, and global partnerships.
  • External Action Guarantee Expansion: By enhancing this guarantee, the EU can mobilize more private and public investments in partner countries.
    • It reduces risk for investors in fragile regions.
    • It boosts EU credibility as a global development and security actor.
  • Strategic Implication: This positions the EU as a stronger player in global geopolitics, especially in Africa, Asia, and Latin America, where competition with China and other powers is intense.
Energy Independence Push
  • Stepwise Ban on Russian Gas Imports: The Council’s approval marks a decisive shift away from Russian energy dependence.
    • The EU had already reduced Russian oil imports; gas was the harder challenge due to infrastructure reliance.
    • A phased ban allows member states to adjust supply chains and expand LNG terminals, renewables, and interconnections.
  • Strategic Implication: This is not just about energy—it’s about sovereignty. Cutting Russian gas ties reduces vulnerability to geopolitical blackmail and strengthens EU unity.
Broader Context
  • These moves are part of the EU’s dual strategy, externally to Build partnerships and project influence through funding guarantees. And, internally to secure energy independence and resilience.
  • Together, they reinforce the EU’s ambition to be a geopolitical union, less dependent on adversarial powers and more capable of shaping global norms.
About European Commission and European Council
The European Commission is the EU’s executive body that proposes and enforces laws, while the European Council is the political body of EU leaders that sets the overall direction and priorities of the Union.
 

European Commission
  • Role: Executive branch of the EU.
  • Functions:
    • Proposes new legislation.
    • Implements EU policies and budget.
    • Enforces EU law (can take member states to court if they break rules).
  • Composition: 27 Commissioners (one from each member state), led by the President of the Commission (currently Ursula von der Leyen).
  • Accountability: Answerable to the European Parliament, which can dismiss the Commission.
  • Analogy: Similar to a national government cabinet.
European Council
  • Role: Defines the EU’s overall political direction and priorities.
  • Functions:
    • Sets long-term strategy (e.g., foreign policy, enlargement, climate goals).
    • Decides on major issues like treaties, crises, and leadership appointments.
  • Composition: Heads of state or government of the 27 EU countries, plus the President of the European Council (currently Antonio Costa).
  • Accountability: Not a legislative body—does not pass laws but guides the EU agenda.
  • Analogy: Similar to a summit of national leaders.
Key Differences
Feature European Commission European Council
Nature Executive body Political body
Members 27 Commissioners (appointed) 27 Heads of State/Government (elected nationally)
Leader President of the Commission President of the European Council
Main Role Proposes/enforces laws, manages EU Sets priorities, defines strategy
Decision Power Drafts legislation, ensures compliance No legislative power, but sets agenda
Accountability To European Parliament To national governments
 
 
 
 
India- EU Security and Defence Partnership
 
Why in news?
India and the European Union formally signed a landmark Security and Defence Partnership on 27 January 2026 in New Delhi, marking a major upgrade in their strategic ties. The pact establishes cooperation in defence capabilities, counterterrorism, cybersecurity, and maritime security, alongside progress on a free trade agreement.
 

Key Highlights of the India–EU Security & Defence Partnership
  • Date & Venue: Signed on 27 January 2026 in New Delhi during the 16th India–EU Summit.
  • Signatories:
    • India: Defence Minister Rajnath Singh and service chiefs.
    • EU: Kaja Kallas, EU High Representative for Foreign Affairs and Security Policy.
  • Scope of Cooperation:
    • Defence Capabilities: Joint research, technology sharing, and potential Indian participation in European defence initiatives.
    • Counterterrorism: Intelligence sharing and coordinated strategies against global terror networks.
    • Cybersecurity: Collaboration on cyber resilience, threat detection, and digital infrastructure protection.
    • Maritime Security: Joint naval exercises, anti-piracy operations, and safeguarding Indo-Pacific sea lanes.
Strategic Context
  • Global Tensions: The pact comes amid rising geopolitical volatility, including Indo-Pacific security challenges and European concerns over Russia and Middle East instability.
  • Upgrade from 2004 Framework: Builds on the 2004 India–EU Strategic Partnership, expanding beyond trade and political dialogue into hard security cooperation.
  • Complementary Agreements: Alongside this pact, India and the EU are finalizing a Free Trade Agreement (FTA) and a mobility framework to ease student and professional exchanges.
India–EU vs. Other Defence Partnerships
Partnership Year Formalized Key Focus Areas Strategic Importance
India–EU Security & Defence Partnership 2026 Defence tech, counterterrorism, cybersecurity, maritime security Strengthens India’s ties with Europe, diversifies beyond US/Russia
India–US Defence Framework 2016 (renewed) Defence sales, joint exercises, Indo-Pacific strategy Anchors India’s role in QUAD and Indo-Pacific
India–France Strategic Partnership 1998 Defence procurement (Rafale jets), nuclear cooperation Deep bilateral defence-industrial ties
India–Russia Defence Cooperation 1971 (Treaty of Peace, Friendship & Cooperation) Arms supply, joint production Long-standing but strained by Russia’s tilt toward China

Risks & Challenges
  • Technology Transfer Sensitivities: EU states may be cautious about sharing advanced defence tech.
  • Balancing Alliances: India must manage ties with the US, Russia, and EU without overdependence.
  • Implementation Pace: Past India–EU agreements (like FTA talks) faced delays; defence cooperation may encounter similar hurdles.
  • Cybersecurity Divergence: EU’s strict data protection norms (GDPR) may complicate joint cyber operations.
Importance for India
  • Diversifies Defence Partnerships: Reduces reliance on Russia and balances US influence.
  • Boosts Indo-Pacific Strategy: EU’s involvement strengthens India’s maritime security posture.
  • Economic Linkages: Defence pact complements trade and mobility agreements, creating a holistic strategic partnership.
 

 
India- EU Free Trade Agreement
 
Why in news?
India and the European Union have officially signed a landmark Free Trade Agreement (FTA) on January 27, 2026, after nearly two decades of negotiations. This “mother of all deals” covers economies representing nearly 2 billion people and about 25% of global GDP, promising major tariff reductions, expanded market access, and stronger strategic ties.
  • Scope: Comprehensive agreement covering trade in goods, services, investments, energy, and technology cooperation.
  • Economic Impact:
    • Represents 25% of global GDP and one-third of global trade.
    • Expected to boost Indian exports, especially in textiles, pharmaceuticals, IT services, and renewable energy.
    • EU gains greater access to India’s fast-growing consumer market and energy sector.
Benefits for India
  • Tariff Reductions: Lower duties on Indian exports like textiles, leather, and agricultural products.
  • Market Diversification: Helps Indian exporters reduce reliance on the US and China amid shifting global trade dynamics.
  • Energy & Tech Cooperation: EU investments in India’s renewable energy sector, with targets of $100 billion in oil & gas and $500 billion in energy investments.
  • Strategic Leverage: Strengthens India’s position against protectionist measures from other economies.
Benefits for the EU
  • Access to India’s Market: Expands opportunities in consumer goods, automobiles, luxury products, and financial services.
  • Supply Chain Resilience: Reduces dependence on China by deepening ties with India.
  • Energy Security: EU firms gain entry into India’s growing energy and infrastructure sectors.
Challenges & Risks
  • Regulatory Alignment: India and EU must harmonize standards on data protection, labor, and environmental rules.
  • Agriculture Sensitivity: Indian farmers may face competition from EU agricultural imports.
  • Geopolitical Pressures: US tariffs and global trade tensions could complicate implementation.
  • Implementation Timeline: Though signed, full tariff reductions and regulatory changes may phase in over several years.
 

 
Schizophrenia
 
Why in news?
Recent research highlights advances in understanding schizophrenia, including new treatments and brain mechanisms.
 

Key Advances in Schizophrenia Research
 
Novel Drug Developments
  • KarXT (Karuna Therapeutics)
    • Combines xanomeline (muscarinic agonist) with trospium (peripheral blocker).
    • Shows promise in reducing positive symptoms (hallucinations, delusions) while minimizing side effects like weight gain and extrapyramidal symptoms.
    • Phase III trials indicate significant efficacy, potentially positioning KarXT as a first-in-class muscarinic-based therapy.
  • Cobenfy (AbbVie)
    • A new mechanism-based drug that has reshaped understanding of schizophrenia’s pathophysiology.
    • Targets non-dopaminergic pathways, offering hope for patients resistant to standard antipsychotics.
  • Other emerging compounds
  • Focus on glutamatergic modulation (NMDA receptor enhancers, glycine modulators).
  • Trials exploring TAAR1 agonists (trace amine-associated receptor 1) for improved tolerability and cognitive outcomes.
Clinical Challenges & Opportunities
  • Unmet needs remain:
    • Current antipsychotics poorly address negative symptoms and cognitive impairment, which are major contributors to disability.
    • Long-term tolerability issues (weight gain, metabolic syndrome) drive demand for safer alternatives.
  • Optimism vs. caution:
    • While breakthroughs like KarXT and Cobenfy inspire hope, past failures (e.g., muscarinic trials) remind clinicians of the difficulty in translating lab success to real-world outcomes.
About Schizophrenia
  • Schizophrenia is a chronic and severe mental health disorder that affects how a person thinks, feels, and behaves, often leading to hallucinations, delusions, and disorganized thinking. It distorts perception of reality, emotions, and social functioning.
  • It usually begins between ages 16–30 and requires lifelong treatment with medication, therapy, and social support.
  • Affects less than 1% of the global population, but is among the most disabling mental illnesses.
Key Symptoms
  • Positive symptoms (added experiences):
    • Hallucinations (hearing voices, seeing things not present).
    • Delusions (false, fixed beliefs).
    • Disorganized speech or behavior.
  • Negative symptoms (loss of normal function):
    • Reduced emotional expression.
    • Social withdrawal.
    • Lack of motivation.
  • Cognitive symptoms:
    • Difficulty concentrating.
    • Poor memory and decision-making.
Causes & Risk Factors
  • Genetics: Family history increases risk.
  • Brain chemistry: Imbalances in neurotransmitters like dopamine and glutamate.
  • Environmental factors: Prenatal complications, stress, or substance use may contribute.
Diagnosis & Treatment
  • Diagnosis: Based on psychiatric evaluation, medical history, and ruling out other conditions.
  • Treatment approaches:
    • Medication: Antipsychotics are the mainstay.
    • Therapy: Cognitive behavioral therapy (CBT), social skills training.
    • Support: Family education, community programs, vocational rehabilitation.
  • Lifelong management: Relapses are common if treatment is stopped.
Challenges & Risks
  • Many patients do not realize they are ill, making adherence to treatment difficult.
  • Untreated schizophrenia can lead to severe disability, unemployment, homelessness, or substance abuse.
  • Stigma remains a major barrier to care, especially in countries like India where awareness is limited.
Context for India
  • In India, schizophrenia is recognized under the Mental Healthcare Act, 2017, which ensures the right to treatment and protection from discrimination.
  • Access to psychiatric care is improving, but urban-rural gaps remain significant.
  • Community-based mental health programs are expanding, especially in states like Tamil Nadu and Uttar Pradesh.
 

 
Radioactive Decay
 
About Radioactive Decay
Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, transforming into a more stable state. The most common types are alpha, beta, and gamma decay, each releasing different particles or energy.
 

Forces Involved:
  • Weak nuclear force - responsible for beta decay.
  • Electromagnetic & strong nuclear forces - govern alpha and gamma decay
Types of Radioactive Decay
Type of Decay What is Emitted Example Effect on Nucleus
Alpha (α) Helium nucleus (2 protons + 2 neutrons) Uranium-238 to Thorium-234 Mass decreases significantly
Beta (β) Electron (β⁻) or positron (β⁺) Carbon-14 to Nitrogen-14 Proton/neutron ratio changes
Gamma (γ) High-energy photon (electromagnetic radiation) Cobalt-60 to Cobalt-60* Energy decreases, no change in mass/charge
 
Applications of Radioactive Decay
  • Medicine: Radiation therapy for cancer, diagnostic imaging (PET scans).
  • Archaeology: Carbon dating (using C-14) to determine the age of fossils and artifacts.
  • Energy: Nuclear power generation relies on controlled radioactive decay.
  • Environmental Science: Tracking pollutants and studying geological processes.
Risks & Safety
  • Radiation exposure can damage living tissue, causing burns, mutations, or cancer.
  • Shielding: Lead or concrete is used to block radiation.
  • Regulation: Strict safety protocols in nuclear plants, hospitals, and labs.
 

 
Ashoka Chakra gallantry award
 
Why in news?
Group Captain Shubhanshu Shukla, an Indian Air Force officer and astronaut, was recently awarded the Ashoka Chakra, India's highest peacetime gallantry honor. 
 

Achievements of Group Captain Shubhanshu Shukla
  • First Indian to set foot on the International Space Station (ISS) under the Axiom-4 mission in 2025.
  • Displayed exceptional courage, swift decision-making, and commitment to duty during the mission.
  • Conducted pioneering experiments, including agricultural trials in space (cultivating fenugreek and mung beans).
Significance: Recognized as a landmark in India’s growing strategic role in the space sector.
 

About Ashoka Chakra gallantry award
The Ashoka Chakra is India’s highest peacetime gallantry award, given for acts of extraordinary bravery, valor, or self-sacrifice away from the battlefield.
 

Key facts
  • Established: 1952
  • Nature: India’s highest peacetime military decoration
  • Eligibility:
    • Officers of the Armed Forces, Territorial Army, militia, and other lawfully constituted forces
    • Members of nursing services of the Armed Forces
    • Civilians, police, paramilitary forces, and Railway Protection Force
  • Awarded For:
    • Most conspicuous bravery
    • Acts of daring or pre-eminent valor
    • Self-sacrifice in non-combat situations
  • Equivalent: Param Vir Chakra (wartime)
  • Post-nominal letters: AC
Historical Context
  • First Recipients (1952): Havildar Bachittar Singh and Naik Narbahadur Thapa for bravery during Operation Polo in Hyderabad.
  • Total Awardees (1952–2026): 87 recipients, including 68 posthumous honors.
 
 
 
Palaeoclimatology
 
About Palaeoclimatology
Palaeoclimatology is the scientific study of Earth’s past climates, using natural records like ice cores, tree rings, sediments, and fossils to reconstruct how climate has changed over millions of years. It helps us understand natural variability, the causes of ice ages, and provides context for current global warming.
 

Methods & Evidence (Proxies)
Palaeoclimatologists rely on proxy data—natural archives that preserve climate signals:
  • Ice cores (Antarctica, Greenland): Trap bubbles of ancient air, revealing past COβ‚‚ levels and temperatures.
  • Tree rings (Dendroclimatology): Width and density reflect rainfall and temperature year by year.
  • Sediments & boreholes: Contain pollen, isotopes, and microfossils that indicate vegetation and ocean conditions.
  • Corals & shells: Record ocean temperatures and chemistry.
  • Glacial deposits: Show the extent of ice sheets during past ice ages.
Major Insights from Palaeoclimatology
  • Ice Ages: Identified cycles of glaciation driven by Earth’s orbital changes (Milankovitch cycles).
  • Warm Periods: Evidence of warmer climates like the Medieval Warm Period and the Holocene Climatic Optimum.
  • Carbon & Climate Link: Past records show strong correlation between greenhouse gases and global temperatures.
  • Mass Extinctions: Climate shifts contributed to events like the end-Permian extinction.
Importance Today
  • Context for Global Warming: By comparing current warming trends with natural variability, scientists confirm that modern climate change is unprecedented in speed and scale.
  • Predictive Models: Past climate data improves accuracy of future climate projections.
  • Policy & Awareness: Helps governments and communities understand risks like sea-level rise, droughts, and extreme weather.
 
 
 
 

Question & Answer
 
Q1. With reference to Palaeoclimatology, consider the following statements:
  1. It reconstructs Earth’s past climate using indirect evidence known as proxies.
  2. Instrumental records are the primary data source for palaeoclimatic studies.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
 
Explanation: Palaeoclimatology relies on proxy records like ice cores and sediments, not instrumental data, which are limited to the recent past.
 
 
Q2. Ice cores extracted from Antarctica are important for palaeoclimatic studies because they:
  1. Trap ancient air bubbles revealing past atmospheric composition.
  2. Provide direct records of volcanic eruptions and temperature changes.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
 
Explanation: Ice cores preserve COβ‚‚ levels, temperature proxies, and volcanic ash layers, making them invaluable climate archives.
 
 
Q3. Consider the following climate proxies:
  1. Tree rings
  2. Coral reefs
  3. Borehole temperatures
Which of the above can be used to infer past climatic conditions?
(a) 1 and 2 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
 
Explanation: All listed proxies help reconstruct past temperature, rainfall, and ocean conditions.
 
 
Q4. The Milankovitch cycles are related to:
(a) Plate tectonic movements
(b) Solar flares and sunspots
(c) Variations in Earth’s orbital parameters
(d) Volcanic activity patterns
 
Explanation: Milankovitch cycles involve eccentricity, axial tilt, and precession, driving long-term glacial–interglacial cycles.
 
 
Q5. With reference to palaeoclimatology, consider the following statements:
  1. The Holocene Climatic Optimum was warmer than the last Ice Age.
  2. The Medieval Warm Period occurred before the Industrial Revolution.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
 
Explanation: Both were natural warm phases identified through palaeoclimate records.
 
 
Q6. Carbon-14 dating is primarily useful in palaeoclimatology for:
(a) Dating rocks older than a million years
(b) Determining age of organic remains up to ~50,000 years
(c) Measuring past atmospheric oxygen levels
(d) Identifying ocean circulation patterns
 
Explanation: Radiocarbon dating works on organic material and has a limited age range.
 
 
Q7. Which of the following best explains the significance of palaeoclimatology in present times?
(a) It replaces modern climate models
(b) It proves climate change is purely natural
(c) It provides baseline data to compare current warming trends
(d) It eliminates uncertainty in climate projections
 
Explanation: Past climate records show that current warming is unusually rapid and human-driven.
 
 
Q8. Consider the following statements regarding glacial deposits:
  1. They indicate the extent of ice sheets in the past.
  2. They provide evidence of sea-level rise during warm periods.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
 
Explanation: Glacial deposits reveal ice advance–retreat cycles, linked to sea-level changes.
 
 
Q9. Which of the following are direct indicators of past ocean temperatures?
  1. Coral growth bands
  2. Oxygen isotope ratios in shells
  3. Volcanic ash layers
Select the correct answer using the code below:
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
 
Explanation: Corals and isotopic ratios record sea surface temperatures, while ash layers indicate eruptions.
 
 
Q10. Palaeoclimatic evidence suggests that mass extinctions in Earth’s history were often linked to:
(a) Sudden asteroid impacts only
(b) Rapid and large-scale climate changes
(c) Ocean tides and lunar cycles
(d) Human activities
 
Explanation: Events like the end-Permian extinction were driven by severe climate shifts.
 
 
Q11. With reference to predictive climate models, palaeoclimatic data is important because it:
(a) Eliminates the need for satellite observations
(b) Provides long-term validation of climate sensitivity
(c) Focuses only on regional climate variability
(d) Applies only to ice age studies
 
Explanation: Past climate responses help test and refine future climate projections, improving reliability.

 

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