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NCERT Solutions for CBSE Class 6 Science Chapter 7: Temperature and its Measurement

Temperature measurement forms the foundation of scientific observation, yet most Class 6 students initially rely on touch to judge whether water is hot or a room is cold. CBSE Class 6 Science Chapter 7 Temperature and its Measurement bridges this gap by introducing thermometers as objective instruments that replace subjective sensation with numerical Celsius readings. The 2024-25 NCERT curriculum devotes this chapter to clinical and laboratory thermometers, the Celsius scale's construction, and basic heat transfer concepts that explain why mercury rises when the bulb contacts warm skin. These NCERT solutions decode every textbook exercise, show how to read mercury column positions against printed scales, and clarify why a clinical thermometer's kink matters for accurate fever diagnosis. Whether your child is preparing for term exams or building conceptual clarity, the step-by-step answers below align perfectly with NCERT pedagogy and include real-world applications every parent will recognise from daily life.

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Key takeaways

  • ✓CBSE Class 6 Science Chapter 7 Temperature and its Measurement distinguishes subjective sensation (hot/cold) from objective measurement using thermometers calibrated in degrees Celsius.
  • ✓Clinical thermometers have a constriction (kink) near the bulb to prevent mercury from falling immediately, enabling accurate body temperature recording between 35°C and 42°C.
  • ✓Laboratory thermometers lack a kink, measure a wider range (-10°C to 110°C), and must be read while still immersed in the substance being measured.
  • ✓The Celsius scale defines 0°C as the freezing point of pure water and 100°C as the boiling point at standard atmospheric pressure, providing a universal reference.
  • ✓Heat always flows from hotter objects to colder objects until thermal equilibrium is reached, a principle demonstrated when a thermometer bulb warms up in contact with the body.
  • ✓Normal human body temperature is approximately 37°C; readings above 38°C typically indicate fever, making clinical thermometers essential diagnostic tools.
  • ✓NCERT Solutions for CBSE Class 6 Science Chapter 7 include worked examples on reading thermometer scales, converting observations into correct Celsius values, and explaining safety precautions during mercury handling.

Understanding Hot and Cold: Subjective Sensation vs Objective Measurement

CBSE Class 6 Science Chapter 7 opens by challenging students to rely on instruments rather than their hands for temperature judgements. The NCERT textbook presents an activity where one hand is placed in cold water, the other in hot water, then both are plunged into lukewarm water simultaneously. Surprisingly, the lukewarm water feels hot to the cold-adapted hand and cold to the hot-adapted hand, proving that human skin is an unreliable thermometer. This demonstration underscores why scientists invented thermometers: to provide a consistent, universal measure independent of individual perception. In exam questions, students often encounter scenarios asking them to explain why two people might disagree about room temperature despite standing in the same space; the answer lies in their prior exposure (one may have just entered from outdoors in summer, the other from an air-conditioned car). The NCERT solutions for Class 6 Science Chapter 7 emphasise writing precise explanations that cite the subjective nature of touch versus the objective Celsius scale. This distinction lays groundwork for understanding temperature as a physical quantity measured in standardised units, preparing students for calorimetry and thermodynamics in Classes 7–10.
  • Hot and cold are subjective terms; the same object can feel different to different observers depending on prior temperature exposure.
  • Thermometers eliminate subjectivity by using liquid expansion (mercury or alcohol) calibrated against fixed reference points like ice and steam.
  • NCERT activities in this chapter encourage hands-on exploration, making abstract temperature concepts tangible for Class 6 minds.
  • Exam questions test the ability to distinguish sensation from measurement, often awarding 2 marks for a well-reasoned explanation citing the activity.

Clinical Thermometers: Structure, Range, and the Crucial Kink

Clinical thermometers are designed exclusively for measuring human body temperature, with a narrow range of 35°C to 42°C printed on their glass stems. The NCERT textbook for CBSE Class 6 Science Chapter 7 describes the key structural feature: a constriction or 'kink' in the bore just above the mercury bulb. This kink prevents the mercury thread from sliding back into the bulb immediately after the thermometer is removed from under the tongue or armpit, allowing the healthcare provider time to note the reading. Without the kink, mercury would contract so rapidly that accurate measurement would be nearly impossible. Students must understand that the normal body temperature is around 37°C, and readings above 38°C generally indicate fever. In NCERT exercise questions, a common 3-mark query asks students to draw a labelled diagram of a clinical thermometer showing the bulb, stem, kink, and scale. The solutions provided here include exact NCERT-aligned labels and emphasise safety: clinical thermometers contain toxic mercury, so they must be handled carefully, never shaken violently near hard surfaces, and disposed of according to local regulations. Modern digital alternatives are mentioned as safer, faster options, yet the chapter focuses on mercury-in-glass models because they illustrate thermal expansion principles clearly.
  • Range: 35°C to 42°C, covering the physiological spectrum from hypothermia risk to high fever.
  • Kink: prevents mercury backflow, enabling leisurely reading after removal from the body.
  • Usage: placed under the tongue (oral) or in the armpit (axillary) for 1–2 minutes until mercury stabilises.
  • Precautions: wash with antiseptic before and after use, never dip in boiling water (mercury would expand beyond scale and break glass), store in a protective case.

Laboratory Thermometers: Wider Range and Continuous Reading

Laboratory thermometers measure a much broader temperature range, typically from -10°C to 110°C, making them suitable for science experiments involving ice-salt mixtures (below 0°C) and boiling water (100°C at sea level). Unlike clinical thermometers, laboratory models have no kink; mercury flows freely back into the bulb as soon as the heat source is removed. Consequently, NCERT Solutions for CBSE Class 6 Science Chapter 7 stress that laboratory thermometers must be read while the bulb remains immersed in the substance being measured. If a student lifts the thermometer out of hot water to check the scale, the mercury will drop instantly, yielding an incorrect (lower) reading. Exam questions often present a scenario where a student mistakenly removes a laboratory thermometer from boiling water and records 85°C instead of 100°C, then ask what error occurred. The correct answer explains the absence of a kink and the rapid mercury contraction in cooler air. The NCERT textbook includes a comparative table (reproduced below) to help students choose the right instrument for each task, a table format frequently tested in 2-mark questions on the CBSE Class 6 Science term exams.

The Celsius Scale: Freezing Point, Boiling Point, and Degree Divisions

CBSE Class 6 Science Chapter 7 Temperature and its Measurement introduces the Celsius scale (symbol °C) as the standard metric unit for temperature in India and most of the world. The scale is anchored by two fixed points: 0°C is defined as the temperature at which pure water freezes under standard atmospheric pressure (101.3 kPa at sea level), and 100°C is the temperature at which water boils under the same conditions. The interval between these two points is divided into 100 equal parts, each representing one degree Celsius. Students learn that the symbol '°C' must always accompany numerical temperature values (writing '37 degrees' alone is incomplete; the correct form is '37°C'). NCERT exercises ask learners to arrange given temperatures in ascending order (e.g. -5°C, 0°C, 23°C, 37°C, 100°C, 150°C) and explain why 0°C is not the coldest possible temperature (absolute zero is -273.15°C, though that concept appears only in senior classes). The solutions provided here show students how to mark these reference points on a blank thermometer diagram, count scale divisions carefully, and avoid common errors like confusing the freezing point of saltwater (lower than 0°C) with that of pure water. Understanding the Celsius scale is critical because it underpins all quantitative temperature discussions in physics and chemistry through Class 12.
  • 0°C (freezing point of water) and 100°C (boiling point of water) serve as universal calibration references for the Celsius scale.
  • Each small division on a typical laboratory thermometer represents 1°C or 0.5°C, depending on the instrument's precision.
  • Negative Celsius values indicate temperatures below the freezing point of water; positive values indicate temperatures above it.
  • In CBSE exams, students may be asked to read a partially shown thermometer scale and calculate the temperature if mercury reaches the 7th division above 30°C (answer: 37°C).

How to Read a Thermometer: Step-by-Step Procedure

Reading a mercury thermometer accurately is a practical skill tested both in practicals and theory papers for CBSE Class 6 Science Chapter 7. The NCERT textbook outlines a clear procedure: first, hold the thermometer horizontally at eye level to avoid parallax error (looking from above or below distorts the mercury column's apparent position). Second, identify the scale markings—most clinical thermometers have long lines every degree and short lines every 0.2°C or 0.5°C. Third, note where the top of the mercury column aligns with the scale; if it falls between two marks, estimate to the nearest tenth. For clinical thermometers, ensure the reading is taken after the mercury has stopped rising (usually 1–2 minutes of contact). For laboratory thermometers, keep the bulb submerged and read while the mercury is stable. NCERT solutions for Class 6 Science Chapter 7 include annotated diagrams showing correct eye position and common mistakes like tilting the thermometer or reading the bottom of the mercury meniscus instead of the top. In practical exams, students lose marks if they report 37.3°C when the actual reading is 37.5°C due to careless interpolation. Mastering this skill also aids in understanding graphs and scales in mathematics, making it a cross-curricular competency.
  • Hold the thermometer at eye level to eliminate parallax error.
  • Identify the value of each small division (commonly 0.2°C, 0.5°C, or 1°C).
  • Read the top of the mercury column, not the bottom or middle.
  • For clinical thermometers, jerk downward before use to reset mercury below 35°C; for laboratory models, simply remove from heat source and mercury will fall naturally.

Recording Body Temperature: Normal Range, Fever, and Hypothermia

Human body temperature regulation is a vital physiological process, and CBSE Class 6 Science Chapter 7 uses clinical thermometers to quantify it. Normal body temperature hovers around 37°C (98.6°F), though it varies slightly by time of day, activity level, and measurement site (oral readings are typically 0.3–0.5°C higher than axillary). The NCERT textbook defines fever as a body temperature above 38°C, signalling that the immune system is fighting infection. Hypothermia, conversely, occurs when core temperature drops below 35°C, risking organ failure if untreated. Students learn to interpret clinical thermometer readings in context: a reading of 36.8°C is normal, 38.2°C suggests mild fever warranting rest and fluids, and 39.5°C indicates high fever requiring medical consultation. NCERT exercise questions ask students to classify given temperatures (e.g. 35.2°C, 37.1°C, 38.9°C, 40.5°C) into normal, mild fever, and high fever categories. The solutions provided here include a quick-reference table and remind students that environmental factors (a child playing cricket in the sun may temporarily read 37.8°C) must be considered. Understanding these ranges is not just academic—it empowers students to assist caregivers at home when a family member feels unwell, reinforcing the practical relevance of Class 6 Science concepts.

Heat Transfer Basics: Why Mercury Rises in a Thermometer

CBSE Class 6 Science Chapter 7 Temperature and its Measurement lays the conceptual groundwork for heat transfer, a topic that expands significantly in Classes 7 and 8. When the glass bulb of a thermometer touches a warm object (such as a person's tongue at 37°C), heat energy flows from the warmer tongue into the cooler mercury inside the bulb. This influx of heat causes the mercury atoms to vibrate more vigorously and occupy more space—a phenomenon called thermal expansion. Because mercury is confined in a narrow tube, it has nowhere to go but up, producing a visible rise in the column. Conversely, when the thermometer is removed and exposed to cooler air (say, 25°C room temperature), heat flows out of the mercury into the air, the atoms slow down, and the mercury contracts, dropping back down. The NCERT textbook does not examine conduction, convection, or radiation mechanisms in detail at Class 6 level, but it does establish the principle that heat always flows from hot to cold until thermal equilibrium (equal temperature) is reached. NCERT solutions for this chapter include qualitative explanations of why we wait 1–2 minutes for the mercury to stabilise: the heat transfer from body to mercury takes time, and premature reading would underestimate the true temperature. In exams, a 3-mark question might ask students to explain the process of mercury expansion when a thermometer is placed under the tongue, expecting keywords like 'heat transfer', 'thermal expansion', and 'equilibrium'.
  • Heat is a form of energy that flows spontaneously from higher-temperature regions to lower-temperature regions.
  • Thermal expansion: most liquids and solids expand when heated; mercury expands uniformly, making it ideal for thermometry.
  • Thermal equilibrium: when the thermometer and the body reach the same temperature, mercury stops rising, indicating a stable reading.
  • Glass is a poor conductor of heat compared to metals, so the bulb is kept thin to speed up heat transfer into the mercury.

Common Mistakes Students Make and How to Avoid Them

Even after studying NCERT Solutions for CBSE Class 6 Science Chapter 7, students frequently make avoidable errors during exams and practicals. One mistake is using a clinical thermometer to measure boiling water temperature; because clinical thermometers max out at 42°C, the mercury would expand beyond the scale, potentially shattering the glass. Another error is failing to reset a clinical thermometer by jerking it downward before reuse, leading to falsely high readings (if the previous reading was 38°C and mercury did not drop, the next measurement might incorrectly start at 38°C). In theory papers, students often write '37 degrees' without the Celsius symbol or mix up the thermometer types, stating that laboratory thermometers have a kink. Additionally, some learners read the thermometer immediately after immersion, not allowing time for thermal equilibrium, resulting in underestimated temperatures. NCERT exercise solutions repeatedly highlight these pitfalls. A well-prepared Class 6 student will always specify '°C', choose the correct thermometer for each scenario, wait patiently for mercury stabilisation, and handle mercury instruments with care. Teachers and parents should drill these points through practice questions, ensuring that careless errors do not cost marks in term exams where even 1-mark questions on instrument selection appear regularly.
  • Never use a clinical thermometer for temperatures above 42°C or below 35°C—select a laboratory thermometer instead.
  • Always jerk a clinical thermometer downward before use to reset mercury below 35°C; laboratory thermometers need no jerk because they lack a kink.
  • Avoid parallax error by holding the thermometer at eye level, perpendicular to your line of sight.
  • Do not remove a laboratory thermometer from the liquid before reading; mercury will drop instantly due to the absence of a kink.
  • Include the °C symbol in all numerical answers; writing '98.6' without units is incomplete and may lose marks.

Digital Thermometers: A Modern Alternative Mentioned in NCERT Context

While the core of CBSE Class 6 Science Chapter 7 revolves around mercury-in-glass thermometers, the NCERT textbook briefly acknowledges digital thermometers as safer, faster alternatives. Digital models use electronic temperature sensors (thermistors) instead of liquid expansion, display readings on an LCD screen, and beep when measurement is complete—typically within 10–30 seconds. They eliminate mercury toxicity risks, making them preferable in homes with young children. However, the chapter's focus remains on traditional thermometers because they vividly demonstrate thermal expansion and the Celsius scale's physical basis. Students should know that digital thermometers still measure in degrees Celsius, and the normal body temperature reference (37°C) remains the same. In exam questions, if asked to compare mercury and digital thermometers, students should mention speed (digital is faster), safety (digital is non-toxic), cost (mercury models are cheaper), and educational value (mercury models illustrate expansion principles). NCERT solutions for Class 6 Science Chapter 7 include such comparative answers, ensuring students appreciate both historical instruments and modern innovations. This dual awareness prepares them for future chapters on sensors and instrumentation in higher classes, where thermistors and thermocouples are explored in depth.
  • Digital thermometers provide readings in 10–30 seconds, much faster than the 1–2 minutes required for mercury models.
  • They contain no toxic mercury, making them safer for household use and easier to dispose of responsibly.
  • Battery-powered digital models may fail if the battery dies, whereas mercury thermometers have no power requirements.
  • Both types measure temperature in degrees Celsius; the physics of heat transfer and thermal equilibrium remains the same.

Real-Life Applications: When and Why We Measure Temperature

CBSE Class 6 Science Chapter 7 Temperature and its Measurement extends beyond textbook exercises to everyday scenarios where accurate temperature data is essential. In healthcare, nurses and parents measure body temperature to detect fever, guiding decisions about medication and doctor visits. In cooking, knowing that water boils at 100°C helps us time recipes (though altitude affects boiling point—a subtlety explored in Class 9 chemistry). Weather forecasts report air temperature, influencing clothing choices and agricultural planning. Industrial processes—steelmaking, chemical reactions, food preservation—rely on precise temperature control monitored by laboratory thermometers or electronic sensors. NCERT solutions for this chapter encourage students to list five situations where temperature measurement matters, fostering awareness of science's pervasive role. For instance, a Class 6 student might write: '1) Checking if I have fever before going to school, 2) Ensuring milk is heated to 80°C for pasteurisation, 3) Confirming room temperature for storing medicines, 4) Monitoring aquarium water for pet fish, 5) Measuring outdoor temperature to decide on sunscreen use.' Such answers earn full marks because they demonstrate applied thinking, not rote memorisation. Parents appreciate this practical emphasis—it transforms abstract Celsius readings into tangible skills their child uses at home, reinforcing the value of CBSE's competency-based curriculum.
  • Healthcare: diagnosing fever, monitoring hypothermia in emergency medicine, ensuring vaccine storage at 2–8°C.
  • Cooking: boiling, frying, baking all depend on reaching specific temperatures for food safety and texture.
  • Weather forecasting: daily high and low temperatures inform public advisories and agricultural irrigation schedules.
  • Scientific research: experiments in physics, chemistry, and biology require controlled temperature environments for reproducibility.

Detailed NCERT Exercise Solutions with Step-by-Step Explanations

The NCERT textbook for CBSE Class 6 Science Chapter 7 concludes with a set of exercises testing comprehension, application, and diagram skills. Below are representative solutions that mirror the depth and format expected in CBSE answer scripts. Question 1 often asks: 'State similarities and differences between laboratory and clinical thermometers.' A model answer lists three similarities (both use mercury/alcohol, both measure in °C, both rely on thermal expansion) and three differences (range, presence of kink, reading method—see the table in an earlier section). Question 2 might require labelling a clinical thermometer diagram with arrows pointing to bulb, stem, mercury thread, kink, and scale; students must write each label neatly beside the correct part. Question 3 typically asks: 'Why is a laboratory thermometer not used to measure body temperature?' The answer should state that its wide range (-10°C to 110°C) makes fine distinctions near 37°C less precise, it lacks a kink so mercury drops before reading, and its larger size is uncomfortable under the tongue or armpit. Question 4 could present three temperature readings (35.8°C, 38.2°C, 39.5°C) and ask students to classify each as normal, mild fever, or high fever—answers must reference the 37°C baseline and 38°C fever threshold from NCERT. Additional questions test scale-reading skills, asking students to determine temperature when mercury aligns with the fourth division above 50°C on a scale where each division is 0.5°C (answer: 52°C). These NCERT solutions for CBSE Class 6 Science Chapter 7 provide the scaffolding students need to score full marks, combining conceptual clarity with precise NCERT-aligned language.
  • Diagram-based questions (3–5 marks) require accurate labels and neat arrows; practice drawing clinical and laboratory thermometers from memory.
  • Comparison questions (3 marks) score best when presented as bulleted points or a two-column table, making distinctions crystal clear.
  • Scenario-based questions (2 marks) demand application of concepts; always cite the principle (e.g. 'no kink, so mercury falls immediately') to justify your answer.
  • Numerical scale-reading questions (2 marks) test arithmetic and observation; double-check your division count and unit (°C) before writing the final answer.

How CBSETUTOR.ai Helps Students Master Temperature and its Measurement

Parents across India are discovering that even well-written NCERT solutions sometimes leave gaps—perhaps a child misreads a thermometer scale during homework, or a tricky 'explain why' question stumps them at 9 pm when tuition centres are closed. This is where CBSETUTOR.ai becomes invaluable. It is an AI tutor available 24×7 that has ingested every NCERT textbook for Classes 6–12, including the complete content of CBSE Class 6 Science Chapter 7 Temperature and its Measurement. A student can photograph a confusing thermometer diagram from their workbook, upload it to CBSETUTOR.ai, and receive an instant, step-by-step explanation of how to read the mercury column against the scale. They can ask in plain English (or Hindi): 'Why does mercury go up when I hold the thermometer?' and get a clear answer referencing thermal expansion and heat flow—exactly the way NCERT teaches it. The platform runs on a simple ₹999/month flat subscription covering all subjects and classes (6–12), with a 3-day free trial requiring no credit card. Unlike generic homework help sites, CBSETUTOR.ai aligns its explanations with NCERT pedagogy, ensuring students learn the correct terminology (kink, Celsius scale, thermal equilibrium) and avoid the mix-ups that cost marks in exams. For families juggling work and studies, having an expert tutor on call at any hour removes the stress of last-minute doubts and builds the child's confidence chapter by chapter.
  • Upload photos of thermometer diagrams or exercise questions; CBSETUTOR.ai annotates and explains each part in NCERT language.
  • Ask conceptual questions like 'What happens if I use a clinical thermometer in boiling water?' and receive safe, accurate answers grounded in Class 6 Science principles.
  • Access the platform anytime—early morning revision before school, late-night homework help, weekend test prep—no scheduling constraints.
  • One subscription (₹999/mo) covers all CBSE subjects for Classes 6–12, making it cost-effective for families with multiple children or students taking Science, Maths, and Social Science simultaneously.

Exam Preparation Tips and Marking Scheme Insights for Chapter 7

CBSE Class 6 Science term exams typically allocate 8–10 marks to Chapter 7 Temperature and its Measurement, distributed across objective (MCQs, fill-in-the-blanks), short-answer (2–3 marks), and diagram-based questions (3–5 marks). To maximise scores, students should memorise the clinical thermometer range (35–42°C), the laboratory thermometer range (-10 to 110°C), and the normal body temperature (37°C)—these numbers appear in at least two questions per paper. Practice drawing and labelling both thermometer types until you can do it in under two minutes; examiners award 1 mark per correct label (bulb, stem, kink, scale, mercury thread), totalling 5 marks for a well-executed diagram. For 'explain why' questions, always structure answers in three parts: state the phenomenon, explain the underlying principle (thermal expansion, heat flow, or instrument design), and relate it back to the question. For instance, if asked why we wait before reading a clinical thermometer, write: 'We wait 1–2 minutes (phenomenon) to allow heat from the body to transfer into the mercury, causing it to expand fully (principle), ensuring the reading reflects the true body temperature rather than an intermediate value (relevance).' NCERT solutions for CBSE Class 6 Science Chapter 7 model this structure, training students to write concise, high-scoring answers. Additionally, revise common mistakes (using wrong thermometer type, omitting °C symbol) and practice past-year questions—CBSE question patterns repeat, so familiarity with previous papers boosts confidence and speed during the actual exam.
  • Memorise key values: 0°C (freezing), 100°C (boiling), 35–42°C (clinical range), 37°C (normal body temp).
  • Allocate 5 minutes to diagram questions; draw large, label clearly, and use a ruler for straight lines if required by the rubric.
  • In comparison questions, use a table or bullet format to clearly distinguish features—examiners appreciate organised answers.
  • Read numerical scale-reading questions twice; identify the division value before calculating the final temperature to avoid arithmetic errors.
  • Time management: finish objective questions in 10 minutes, short answers in 20 minutes, leaving 10 minutes for diagram questions and review.

Frequently asked questions

What is the normal human body temperature according to CBSE Class 6 Science Chapter 7?+
Normal human body temperature is approximately 37°C (98.6°F) as per NCERT. Readings between 36.5°C and 37.5°C are considered within the normal range. Values above 38°C typically indicate fever, while readings below 35°C signal hypothermia risk.
Why does a clinical thermometer have a kink near the bulb?+
The kink (a constriction in the glass bore) prevents mercury from flowing back into the bulb immediately after the thermometer is removed from the body. This allows the healthcare provider sufficient time to read the temperature accurately. Without a kink, mercury would contract too quickly to record.
Can I use a clinical thermometer to measure the temperature of boiling water?+
No, clinical thermometers measure only 35°C to 42°C. Boiling water is 100°C at standard pressure, far exceeding the scale. Immersing a clinical thermometer in boiling water would cause mercury to expand beyond the calibrated range, likely shattering the glass. Always use a laboratory thermometer for such measurements.
How do I reset the mercury in a clinical thermometer after taking a reading?+
Hold the thermometer firmly by the end opposite the bulb and jerk it sharply downward several times (away from walls or furniture). This motion forces the mercury past the kink back into the bulb, resetting it below 35°C for the next measurement. Always do this in an open space to prevent accidental breakage.
What is the difference between the Celsius and Fahrenheit scales in Class 6 curriculum?+
CBSE Class 6 Science Chapter 7 focuses exclusively on the Celsius scale, where water freezes at 0°C and boils at 100°C. Fahrenheit (used mainly in the USA) sets freezing at 32°F and boiling at 212°F. NCERT does not require conversion formulas at Class 6 level; students need only understand Celsius.
Why must I read a laboratory thermometer while the bulb is still in the liquid?+
Laboratory thermometers lack a kink, so mercury contracts immediately when removed from the heat source. If you lift the thermometer out of hot water before reading, mercury drops rapidly as it cools in air, giving an incorrect (lower) temperature. Always keep the bulb immersed and read at eye level while the mercury is stable.
My child's school uses a different Science textbook alongside NCERT—will these solutions still help?+
Yes. All CBSE-affiliated schools must cover the NCERT curriculum for Class 6 Science, so core topics like thermometer types, Celsius scale, and heat transfer remain identical. Supplementary textbooks may add extra examples or activities, but exam questions are framed from NCERT content. These solutions provide the NCERT-aligned foundation your child needs for any CBSE assessment.
How is temperature measurement tested in Class 6 practicals or experiments?+
Practical exams may ask students to measure water temperature using a laboratory thermometer, record readings at 1-minute intervals as water cools, and plot a temperature-time graph. Alternatively, they might verify normal body temperature with a clinical thermometer under teacher supervision. Marks are awarded for correct instrument selection, proper reading technique (eye level, no parallax), and accurate recording with units.
What are the safety precautions when handling mercury thermometers mentioned in NCERT?+
NCERT emphasises: (1) Never shake the thermometer violently near hard surfaces to avoid glass breakage and mercury spillage. (2) Wash the thermometer with antiseptic before and after use to prevent infection spread. (3) Store in a protective case. (4) If broken, do not touch mercury droplets—inform an adult immediately for proper cleanup and disposal, as mercury is toxic.
Why is mercury used in thermometers instead of water?+
Mercury expands uniformly with temperature, remains liquid over a wide range (-39°C to 357°C), is opaque (easy to see in the tube), and does not wet glass (forms a clear meniscus). Water, by contrast, expands irregularly near 4°C, freezes at 0°C, and wets glass, making it unsuitable. Alcohol is sometimes used as a safer, non-toxic alternative for low-temperature thermometers.
How many marks is Chapter 7 typically worth in the CBSE Class 6 Science term exam?+
Chapter 7 Temperature and its Measurement generally carries 8–10 marks in a 40-mark or 80-mark term paper (depending on school exam structure). Expect 2–3 MCQs (1 mark each), one 2-mark short question (e.g. differences between thermometer types), and one 3–5 mark diagram or explanation question. Practicing NCERT exercise solutions ensures thorough coverage of these question patterns.
Can CBSETUTOR.ai help if my child struggles with reading thermometer scales during homework?+
Absolutely. Students can snap a photo of the thermometer diagram or scale from their workbook, upload it to CBSETUTOR.ai, and ask 'What is the temperature reading here?' The AI tutor will identify the mercury level, count divisions, and explain the final value step-by-step in NCERT language. This instant feedback builds skill and confidence, especially when parents are unavailable to help at night.

Related resources

Important Questions: CBSE Class 6 Science Chapter 7 Temperature and its MeasurementCBSE Class 6 Science Chapter 7 Temperature and its Measurement Worksheet with AnswersClass 6 Science Chapter 7 Temperature and its Measurement — Formulas & Key PointsCBSE Class 6 Science Chapter 7 Temperature and its Measurement — NotesAI Tutor for Class 6: The Smart Alternative to TuitionAI Tutor for Class 6 Maths: Learn Faster with Instant HelpOnline Class 9 Science Tutor in Mumbai – 24/7 CBSE-Aligned AI CoachingNCERT Solutions for CBSE Class 9 Mathematics Chapter 1: Number Systems

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