Environmental Studies PYQs

The correct answer is - (A) is true, but (R) is false

Key Points

• Biomass and Fossil Fuels are indeed the two main conventional sources of energy.
• Biomass refers to organic materials such as wood, agricultural residues, and animal waste that can be burned or converted into biofuels.
• Fossil Fuels include coal, petroleum, and natural gas, which are non-renewable and derived from the remains of ancient plants and animals.
• The statement about conventional sources being renewable is false.
• Fossil fuels are non-renewable as they take millions of years to form and cannot be replenished within a human lifespan.
• While biomass can be considered renewable under specific conditions, conventional sources of energy often refer to those that are predominantly non-renewable.

Additional Information

• Conventional Sources of Energy
• These are traditional energy sources that have been widely used for many years.
• Examples include coal, oil, natural gas, and biomass.
• These sources are typically associated with high environmental impact, such as air pollution and greenhouse gas emissions.
• Renewable vs Non-Renewable Energy
• Renewable energy sources include solar, wind, hydro, and geothermal energy, which are replenished naturally.
• Non-renewable energy sources, such as fossil fuels, are finite and cannot be regenerated quickly.
• Biomass can be classified as renewable under proper management, but its inclusion as a conventional source depends on usage patterns.
• Environmental Concerns
• Fossil fuel usage leads to air pollution, global warming, and resource depletion.
• Efforts to transition to renewable energy are crucial for sustainable development.

The correct answer is - Andhra Pradesh

Key Points

• Andhra Pradesh
• Andhra Pradesh is a state located on the southeastern coast of India.
• It has a long coastline along the Bay of Bengal, spanning approximately 972 km, making it the state with the second-longest coastline in India.
• The state is known for its major seaports, including Visakhapatnam Port and Kakinada Port, which are located on the Bay of Bengal.
• Incorrect Options
• Karnataka: Although Karnataka has a coastline, it is located on the Arabian Sea, not the Bay of Bengal.
• Kerala: Kerala’s coastline is also on the Arabian Sea.
• Telangana: Telangana is a landlocked state and does not have any coastline.

Additional Information

• States/Union Territories with Coastline on the Bay of Bengal
• Besides Andhra Pradesh, the following states/UTs also have coasts on the Bay of Bengal:
• Tamil Nadu: Located to the south of Andhra Pradesh, Tamil Nadu has a significant coastline along the Bay of Bengal, including major ports like Chennai and Tuticorin.
• Odisha: Located to the north of Andhra Pradesh, Odisha’s coastline includes major ports such as Paradip and Gopalpur.
• West Bengal: The coastal areas of West Bengal, including the Sundarbans delta, lie along the Bay of Bengal.
• Andaman and Nicobar Islands: This Union Territory is located in the Bay of Bengal and consists of numerous islands.
• Bay of Bengal
• The Bay of Bengal is the largest bay in the world, bordered by India to the west, Bangladesh to the north, and Myanmar and the Andaman and Nicobar Islands to the east.
• It is an important region for trade, fishing, and biodiversity, and it significantly influences the monsoon climate in India.

In the context of assessing children's learning and progress, it is important to recognize the impact of biases on the evaluation process. Biases can affect how teachers observe and record children's abilities, leading to unfair or inaccurate assessments. 

Key PointsInformation which should be recorded as a bias:

• Social background of the child- Recording the social background of a child may unintentionally introduce bias. For example, teachers may unconsciously have preconceived notions or assumptions about a child's abilities based on their social background, which can affect how they assess that child's progress. This should not be used as a deciding factor in evaluating a child's learning.
• Prior experiences regarding the ability and performance of the children- Prior experiences regarding a child’s ability can lead to confirmation bias. If a teacher has preconceived notions based on past interactions, they might assess the child's current performance based on these experiences, rather than on the child's present abilities.
• **Previous results related to the examination of any one subject and any area thereof-**Using previous examination results can also introduce bias. A teacher might unfairly compare a student's current performance with past results, leading to biased conclusions.

Each assessment should be based on the current performance of the child, rather than past results.

Hint

• Samples of children's work collected in a portfolio reflect their actual performance and abilities, which should not be influenced by biases.
• The portfolio is a collection of tangible evidence that showcases a student's progress over time. Unlike subjective opinions or preconceived notions, a portfolio provides concrete examples of what a child has accomplished and is a fair, unbiased reflection of their abilities.

Hence, the correct answer is 'samples of the children's work in the portfolio'.

The correct answer is - Snipping grass and chewing grass respectively

Key Points

• Cows have specialized teeth for their herbivorous diet
• The short front teeth (incisors) are designed for snipping grass.
• The large and flat side teeth (molars) are adapted for chewing and grinding the grass into smaller particles for digestion.
• Snipping and chewing are distinct functions
• Snipping refers to cutting off grass close to the ground, which is efficiently done by the incisors.
• Chewing involves breaking down the grass fibers, a function performed by the molars.
• Adaptation for cellulose digestion
• Cows rely on fibrous plant material as their primary food source, which requires effective chewing to aid microbial digestion in their rumen.

Additional Information

• Cows are ruminants
• Ruminants like cows have a specialized digestive system with a multi-chambered stomach, including the rumen, which helps break down tough plant material.
• The molars play a critical role in mechanical digestion, ensuring grass is properly ground before fermentation in the rumen.
• Difference from carnivores
• Unlike carnivores, cows lack sharp canines and rely on flat molars for grinding plant material.
• This adaptation reflects their herbivorous feeding habits.
• Importance of chewing (rumination)
• Cows chew their food twice – first while eating and later during rumination, where previously swallowed food is regurgitated for further chewing.
• This process helps maximize the breakdown of cellulose, aiding in nutrient absorption.

The correct answer is - High density of sea water

Key Points

• High density of sea water
• The Dead Sea and other salty lakes contain water with exceptionally high salinity levels, making it denser than regular water.
• Density is defined as the mass per unit volume of a substance. The high salt content increases the mass of the water without significantly increasing its volume.
• Due to the high density, the buoyant force exerted by the water is much greater, allowing objects or individuals to float easily.
• Even a person who does not know how to swim can remain afloat because their body is less dense compared to the surrounding water in such lakes.
• This phenomenon is explained by Archimedes' Principle, which states that an object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced.

Additional Information

• Salinity and buoyancy
• Salinity refers to the concentration of dissolved salts in water. The Dead Sea has a salinity of approximately 34%, which is much higher than normal ocean water (about 3.5%).
• In highly saline water, the density increases, leading to greater buoyancy.
• Buoyancy is the upward force exerted by a fluid that opposes the weight of an object submerged in it.
• Dead Sea characteristics
• The Dead Sea is located between Jordan and Israel and is one of the world's saltiest bodies of water.
• Its high salinity is due to evaporation, which leaves behind salts and minerals.
• The dense water prevents most aquatic life from surviving, hence the name "Dead Sea."
• Archimedes' Principle
• States that the upward buoyant force exerted on an object is equal to the weight of the fluid displaced.
• In highly saline water, the displaced water has a higher weight due to its density, resulting in increased buoyant force.

In the context of education, particularly in environmental studies, it is important to understand the terms learning outcome, learning indicator, learning objective, and statement of competency. These terms are used to describe the various aspects of learning and teaching strategies.

Key Points

• A learning outcome describes what a learner is expected to achieve at the end of an activity or lesson.
• In this case, the statement "Child describes different skilled work related to farming and their inheritance (from elders) in daily life" reflects a clear expectation of what the child is supposed to demonstrate after engaging in the lesson.
• The child’s ability to describe farming skills and their inheritance shows the end result of their learning experience, which fits the definition of a learning outcome.

Hint

• Learning indicator: A learning indicator refers to the specific evidence or observable behavior that indicates a student’s progress toward achieving a learning outcome.
• Learning objective: A learning objective is typically more focused on what the teacher aims to teach or what the learner should know at the start of the lesson.
• Statement of competency: A statement of competency describes the skills or abilities that a learner should demonstrate in a particular area.

Hence, the correct answer is learning outcome.

The correct answer is - 2 hours

Key Points

• Boiled milk digestion time
• Boiled milk typically takes 2 hours to digest in the stomach.
• The digestion time is influenced by factors such as the composition of the milk and individual digestive health.
• Milk contains proteins like casein and whey, which are relatively easy to digest.
• Importance of boiling milk
• Boiling milk helps eliminate pathogens and makes it safer for consumption.
• Heat alters the milk proteins slightly, which can make digestion easier for some individuals.

Additional Information

• Factors affecting digestion time
• Individual metabolism: People with faster metabolism may digest food, including milk, more quickly.
• Milk type: Whole milk may take slightly longer to digest compared to skimmed milk due to the higher fat content.
• Age: Digestion efficiency often decreases with age due to a reduction in digestive enzyme activity.
• Lactose intolerance
• Individuals with lactose intolerance may experience difficulty digesting milk due to a lack of the enzyme lactase.
• In such cases, digestion time may vary, or symptoms like bloating and discomfort may occur.
• Nutritional benefits of milk
• Milk is an excellent source of calcium, which is essential for bone health.
• It also provides key nutrients like vitamin D, protein, and potassium.

The correct answer is - Tin, Lithium, Sodium

Key Points

• Tin, Lithium, Sodium
• This group consists solely of elements, each of which is a pure substance composed of only one type of atom.
• Tin (Sn), Lithium (Li), and Sodium (Na) are all classified as chemical elements on the Periodic Table.
• These elements are not alloys or mixtures, but pure substances with distinct atomic structures and properties.
• In contrast, the other options contain alloys (e.g., bronze, steel, brass), which are mixtures of two or more elements, typically metals.
• Other Options:
• Option 1: Bronze and Aluminium are alloys or mixtures, not individual elements.
• Option 2: Steel is an alloy, and Zinc is an element, making this group inconsistent.
• Option 4: Sodium is an element, but Brass is an alloy, making this group invalid.

Additional Information

• Elements
• Elements are pure substances that cannot be broken down into simpler substances by chemical means.
• Each element is represented by a unique chemical symbol on the Periodic Table.
• Examples include Oxygen (O), Hydrogen (H), and Iron (Fe).
• Alloys
• Alloys are mixtures of two or more elements, where at least one is a metal.
• They are created to enhance properties such as strength, durability, and resistance to corrosion.
• Examples of alloys include:
• Bronze (Copper + Tin)
• Steel (Iron + Carbon)
• Brass (Copper + Zinc)
• Periodic Table
• All elements are organized in the Periodic Table based on their atomic number and chemical properties.
• Metals, non-metals, and metalloids are grouped into distinct regions of the table.
• Elements like Lithium and Sodium are classified as alkali metals, while Tin is a post-transition metal.

Tales and stories have always been an important part of children's education, particularly in the field of Environmental Studies (EVS).

Key Points

Most appropriate reason to include tales and stories:

• (B) The use of stories has often been considered important in developing children's sensitivity to environmental issues: Stories and tales are powerful tools for building awareness and sensitivity towards environmental problems. They present environmental issues in a way that is emotionally engaging for children, making the abstract concepts more tangible.
• (C) Because children easily relate themselves to the characters of the story, that is why they have been given an important place in the textbooks: Stories create characters and situations that children can easily relate to. By involving characters who experience environmental challenges, children develop empathy and a sense of responsibility towards their surroundings.

Hint

• While teachers' enthusiasm for storytelling may enhance the learning experience, the main reason stories are included in the EVS curriculum is not simply because of teachers' interest, but because of their educational value in fostering empathy and understanding of environmental issues.
• Although stories are indeed liked by society and children, the primary reason for their inclusion in the curriculum is their ability to develop children's sensitivity to environmental issues, rather than mere popularity.

Hence, the correct answer is (B) and (C).

Lesson 13 in the NCERT Class V Environmental Studies (EVS) textbook describes the amazing journey of "Gaurav Jani". In this lesson, Gaurav Jani embarks on an exciting and adventurous journey, which involves various elements of exploration and personal experience. 

Key Points

• The lesson on Gaurav Jani's journey describes an adventure where he travels and experiences different places, which involves his need for a shelter during his journey.
• In this context, "shelter" refers to the places where Gaurav stays or takes refuge while traveling.
• His journey and the focus on the places where he rests and takes shelter aligns with this theme.

Hint

• Interrelationship: This theme focuses on the relationships between living organisms and their environment.
• Work and Play: While his journey involves both work and play, this theme doesn't fully capture the core message of the lesson.
• Family and Friends: This theme primarily revolves around relationships within a family or friends,.

Hence, the correct answer is shelter.

The correct answer is - Sun-bird and Tailor bird

Key Points

• Sun-bird
• The Sun-bird is known for constructing hanging nests from tree branches or bushes.
• These nests are often oval-shaped, intricately woven, and suspended to protect the eggs from predators.
• Tailor bird
• The Tailor bird creates its nest by stitching leaves together using plant fibers or spider silk.
• Its nest is also hanging and cleverly camouflaged in bushes or trees.
• This unique nesting technique highlights the bird's exceptional skill and adaptability.
• These two birds are commonly found in India and are examples of species that build hanging nests.

Additional Information

• Weaver bird
• Weaver birds are also known for constructing hanging nests, but their nests are typically larger and more complex compared to those of Sun-birds or Tailor birds.
• Their nests are often seen on tall trees and are woven with grass, twigs, and other plant materials.
• Indian Robin
• Unlike the birds mentioned above, the Indian Robin does not build hanging nests. It prefers to nest in crevices, holes, or sheltered spots near the ground.
• Nesting Behavior
• Birds like Sun-birds and Tailor birds adapt their nesting techniques to ensure safety from predators and environmental factors.
• Hanging nests provide additional security, making it harder for ground-based predators to access their eggs or chicks.

The correct answer is - Both Assertion and Reason are true and Reason is the correct explanation of Assertion

Key Points

• Assertion
• The statement "An elephant herd has only female and baby elephants" is true.
• Elephant herds are primarily composed of females (mothers and daughters) and their offspring. Adult males do not typically remain in the herd.
• Reason
• The statement "Male elephants leave their herd after 14-15 years and move around alone" is true.
• Male elephants leave the herd during adolescence (approximately 14-15 years) and live solitary lives or form temporary groups with other males.
• This behavior is a natural part of their social structure and helps reduce competition for mates within the herd.
• The Reason correctly explains the Assertion, as the absence of male elephants in the herd is due to their tendency to leave and live independently after reaching maturity.

Additional Information

• Elephant Social Structure
• Elephants are known for their matriarchal social structure, where a senior female, called the matriarch, leads the herd.
• The herd consists of mothers, daughters, sisters, and their young calves, forming a tightly-knit group.
• Male Elephant Behavior
• Male elephants, known as bulls, leave the herd upon reaching adolescence (14-15 years).
• They typically lead solitary lives or join temporary male groups called "bachelor herds."
• This behavior is essential for preventing conflict within the herd and maintaining genetic diversity during mating.
• Ecological Importance of Elephant Herds
• Elephant herds play a vital role in maintaining the ecosystem, such as dispersing seeds and shaping landscapes.
• Understanding their social structure helps in the conservation efforts for these magnificent animals.

The correct answer is - Both I and II are true

Key Points

• Anaemia and its impact on children's physical health:
• Children with anaemia often experience stunted growth due to reduced oxygen-carrying capacity in the blood.
• Low haemoglobin levels result in low energy levels, making children fatigued and less active.
• Anaemia and its impact on children's mental health:
• Anaemia can lead to poor cognitive development, affecting learning and memory in children.
• Studies show that chronic anaemia is linked to lower academic performance and attention deficits.
• Both statements are true:
• Statement I highlights the physical effects of anaemia in children, such as stunted growth and low energy levels.
• Statement II emphasizes the mental health effects, including cognitive impairments and psychological challenges.

Additional Information

• Causes of anaemia in children:
• Iron deficiency: The most common cause, often due to insufficient dietary intake of iron-rich foods.
• Vitamin deficiencies: Lack of vitamins like B12 and folate can contribute to anaemia.
• Chronic diseases: Conditions such as infections or inflammation can lead to anaemia.
• Symptoms of anaemia:
• Pale skin and nails: A common visible sign of low haemoglobin levels.
• Fatigue and weakness: Reduced oxygen delivery to tissues causes tiredness.
• Shortness of breath: Anaemia can make physical exertion difficult.
• Preventive measures:
• Balanced diet: Include iron-rich foods such as leafy greens, beans, and fortified cereals.
• Supplementation: Iron supplements may be prescribed in cases of severe deficiency.
• Regular health check-ups: Early diagnosis and treatment can prevent complications.

The correct answer is - Bihu - Assam

Key Points

• Bihu
• Bihu is a traditional folk dance of Assam, performed during the Bihu festival.
• The dance is characterized by energetic movements, vibrant costumes, and joyous expressions, symbolizing celebration and agricultural prosperity.
• Bihu is celebrated three times a year: Bohag Bihu (spring), Kati Bihu (autumn), and Magh Bihu (winter).
• This dance is an integral part of Assamese culture, showcasing the state's rich heritage and traditions.

Additional Information

• Lavani
• Lavani is a traditional dance form of Maharashtra, not Tamil Nadu.
• It is performed to the beats of Dholki and is known for its expressive storytelling and rhythmic footwork.
• Bharatnatyam
• Bharatnatyam originates from Tamil Nadu, not Odisha.
• It is one of the oldest classical dance forms in India, characterized by intricate hand gestures (mudras), expressions (abhinaya), and rhythmic footwork.
• Kathak
• Kathak is a classical dance form of North India, particularly Uttar Pradesh, not Karnataka.
• It is known for its storytelling through facial expressions, hand gestures, and rhythmic patterns.

The correct answer is - Option 4 (74 km/hr)

Key Points

• Average Speed Formula
• The formula for average speed is:

Average Speed = Total Distance / Total Time

• Given Data
• Total Distance = 1776 km
• Departure Time = 17:00 on 30^th January 2023
• Arrival Time = 17:00 on 31^st January 2023
• Total Time = 24 hours
• Calculation
• Using the formula:

Average Speed = Total Distance / Total Time

• Average Speed = 1776 km / 24 hours = 74 km/hr
• Correct Answer
• The average speed of the train is 74 km/hr, which matches Option 4.

Additional Information

• Units of Speed
• Speed is measured in units of distance per unit of time, such as km/hr, m/s, etc.
• 1 km/hr = 5/18 m/s when converting to meters per second.
• Key Differences Between Speed, Velocity, and Average Speed
• Speed: The distance traveled per unit time, regardless of direction.
• Velocity: Speed with a specific direction.
• Average Speed: Total distance divided by total time, irrespective of changes in speed.
• Practical Applications of Average Speed
• Used in estimating travel time for journeys.
• Essential for planning transportation schedules and logistics.

In a child-centered Environmental Studies (EVS) classroom, the focus is on active learning where children engage in a variety of activities that foster curiosity, critical thinking, and hands-on experiences.

Key PointsActivities likely to occur in a child centered EVS classroom:

• The seating arrangement will be seen to change according to the activity of the children- This is a common feature in child-centered classrooms. Seating arrangements are flexible and can be modified based on the activity (e.g., group discussions, experiments, project work), promoting collaboration and interaction among students.
• Children will also be seen sharing their experiences while discussing in the class- Sharing experiences is a key component of a child-centered classroom. It allows students to connect personal knowledge to the topic being studied, encourages peer learning, and enhances critical thinking.
• Children will be seen actively working in a variety of activities- This is a fundamental characteristic of a child-centered EVS classroom. Students engage in a variety of hands-on activities, such as field trips, experiments, and group work, which helps them understand environmental concepts more effectively.

Hint

• In a child-centered classroom, students are encouraged to be active participants in the learning process. While the teacher may facilitate learning, the goal is to minimize passive listening and focus on engagement. Therefore, this option is the least likely to occur in a child-centered classroom, as it emphasizes passive learning instead of active involvement.

Hence, the correct answer is 'Children will be seen in the classroom, listening to the teacher'.

The correct answer is - Singapore

Key Points

• Singapore's time zone
• Singapore operates in the Singapore Standard Time (SST), which is UTC+8.
• India operates in the Indian Standard Time (IST), which is UTC+5:30.
• There is a 2.5-hour time difference between India and Singapore.
• Time alignment
• When it is 10 A.M. in India, it is 12:30 P.M. in Singapore.
• This aligns with the statement that it is "around noon" in Singapore.

Additional Information

• Time zones of other cities mentioned
• Karachi
• Karachi operates in Pakistan Standard Time (PST), which is UTC+5.
• When it is 10 A.M. in India, it is 9:30 A.M. in Karachi.
• This does not align with the statement "around noon."
• Japan
• Japan operates in Japan Standard Time (JST), which is UTC+9.
• When it is 10 A.M. in India, it is 1:30 P.M. in Japan.
• This is beyond "around noon."
• London
• London operates in Greenwich Mean Time (GMT) or UTC+0 during standard time.
• When it is 10 A.M. in India, it is 4:30 A.M. in London.
• This is far earlier than "around noon."
• Understanding UTC offsets
• Coordinated Universal Time (UTC) is the primary time standard by which the world regulates clocks and time.
• UTC offsets represent the number of hours ahead (+) or behind (-) UTC for a specific region.
• Knowing UTC offsets helps determine the local time in different regions accurately.

Siddhi, the teacher, is introducing the game of Kabbadi to her class and explaining the rules before they begin playing. This is an important step as it ensures that the children understand how the game is played and the expectations for their behavior. 

Key PointsMost appropriate reason in the above context:

• A) She wants to draw the attention of the children that in life, like in sports, we make rules: It emphasizes the connection between sports and life. By explaining the rules of the game, the teacher is teaching the children that just as sports require rules, so do various aspects of life.
• B) So that all the work is done properly: It is important because explaining the rules ensures that everyone knows how to play the game. Clear instructions help prevent confusion, ensure fairness, and allow the game to be conducted smoothly and effectively.
• C) We are all bound by the rules in the same way in society by which we settle differences and conflicts among ourselves: It connects the rules of the game to broader social principles. It explains that just as rules help organize games, they also serve to manage interactions and resolve conflicts in society.

Hint

• By explaining the rules of the game, the teacher is not only ensuring the game is played properly but is also using the game as an opportunity to teach a broader life lesson about the importance of rules. Therefore, all three reasons (A, B, and C) are relevant and complement each other.

Hence, the correct answer is (A), (B), and (C).

In environmental studies, it is crucial for students, especially at the primary level, to learn by interacting with the environment and engaging in hands-on activities.

Key Points 

• At the primary stage, children are highly receptive to social learning, and their understanding is often enhanced through peer interactions.
• By dividing them into groups and having them classify objects based on properties, the teacher is fostering an environment where children can engage with each other, share ideas, and learn collaboratively.
• This interaction helps children develop a deeper understanding of concepts like classification, properties, and categorization, which can be difficult to grasp through passive learning methods.
• This approach also encourages active participation, which is a critical factor in enhancing children's learning experiences.

Hint

• By doing the activity, children make very few mistakes in understanding the definition and facts - Mistakes are a natural part of the learning process, and the goal is not to eliminate them but to foster deeper understanding through experience.
• Activity strengthens the cognitive domain to a greater extent than the other domains of learning in children - The activity also strengthens the affective (social and emotional) and psychomotor (physical) domains in addition to the cognitive domain.
• The activity develops the child's understanding of all the concepts - The activity focuses mainly on classification and properties, not all concepts in environmental studies.

Hence, the correct answer is 'at the primary stage, children learn better by interacting with each other'.

The correct answer is - Both A and B are correct and B explains A

Key Points

• Statement A: During the cold season, lizards go into a long and deep sleep.
• This refers to a biological phenomenon called hibernation, a state in which certain animals, including lizards, significantly reduce their metabolic activity during unfavorable seasons like winter.
• Cold-blooded animals like lizards are particularly dependent on external temperatures to regulate their body functions, making hibernation essential for survival during colder months.
• Statement B: Some animals go into a long, deep sleep in certain seasons.
• This statement is a general description of hibernation or its counterpart, aestivation (sleep during hot and dry seasons).
• It broadly applies to various species, including mammals, reptiles, and amphibians, who enter such states during extreme environmental conditions.
• Explanation: Statement B explains Statement A because it provides a general understanding of hibernation, which is specifically mentioned in Statement A as a survival mechanism for lizards during cold seasons.

Additional Information

• Hibernation
• Hibernation is a state of prolonged inactivity and reduced metabolism that helps animals conserve energy during periods of food scarcity or extreme cold.
• Animals like bears, bats, and hedgehogs are known for hibernating during winter.
• Reptiles and amphibians, such as lizards and frogs, also hibernate but their mechanisms differ from those of mammals.
• Aestivation
• Aestivation is similar to hibernation but occurs during hot and dry seasons to prevent dehydration and overheating.
• Examples include snails, frogs, and certain lungfish species that aestivate to survive harsh summer conditions.
• Cold-blooded vs Warm-blooded Animals
• Cold-blooded animals (ectotherms) rely on external environmental conditions to regulate their body temperature, making hibernation or aestivation essential for survival during extreme temperatures.
• Warm-blooded animals (endotherms) can regulate their body temperature internally but may still hibernate to conserve energy during food scarcity.