Temperature tells how hot or cold a body is by using a measured value. A thermometer gives a more reliable temperature reading than touch.
Wrong temperature readings can confuse even simple health or laboratory decisions. Important Questions Class 6 Science Chapter 7 help students revise hot and cold judgement, temperature, clinical thermometers, laboratory thermometers, Celsius, Fahrenheit, Kelvin, air temperature, and thermometer precautions for CBSE 2026. The chapter begins with Lambok and Phiban in Shillong, where a fever check shows why proper measurement matters. It also connects classroom investigations with warm water, ice-cold water, boiling water, weather reports, and Anna Mani’s work in weather instruments.
Key Takeaways
- Temperature: Temperature gives a reliable measure of hotness or coldness.
- Normal Body Temperature: A healthy human body temperature is taken as 37.0 °C or 98.6 °F.
- SI Unit: The SI unit of temperature is kelvin, written as K.
- Laboratory Thermometer: Its usual range is -10 °C to 110 °C.
Important Questions Class 6 Science Chapter 7 Structure 2026
| Principle |
Application |
Unit |
| Temperature |
Measure hotness or coldness |
°C, °F, K |
| Clinical Thermometer |
Measure human body temperature |
°C or °F |
| Laboratory Thermometer |
Measure liquids in experiments |
°C |
Important Questions Class 6 Science Chapter 7 With Answers
Important Questions Class 6 Science Chapter 7 With Answers cover definitions, thermometer use, precautions, and NCERT exercise patterns. Students should focus on correct reading methods.
Q1. What Is Temperature In Class 6 Science?
Temperature is a reliable measure of how hot or cold a body is. A hotter body has a higher temperature than a colder body.
Touch may give different feelings for the same water. A thermometer gives a measured value.
Q2. Why Can Touch Give Wrong Temperature Judgement?
Touch can give wrong judgement because our skin compares temperature with its previous condition. The same water may feel warm to one hand and cool to another.
In the NCERT activity, one hand first touches warm water. The other hand first touches ice-cold water.
Q3. What Is A Thermometer?
A thermometer is a device used to measure temperature. It gives a reading on a temperature scale.
Clinical thermometers measure body temperature. Laboratory thermometers measure temperature in experiments.
Q4. Why Did Phiban Use A Thermometer For Lambok?
Phiban used a thermometer because touch alone cannot confirm fever correctly. A measured temperature gives better evidence.
She washed the tip before and after use. This step keeps the thermometer clean.
Q5. What Does A Hotter Body Mean?
A hotter body means a body with a higher temperature. A colder body has a lower temperature.
For example, warm water has a higher temperature than ice-cold water. Temperature compares hotness or coldness.
Class 6 Science Chapter 7 Important Questions On Temperature Scales
Class 6 Science Chapter 7 Important Questions on temperature scales test units and conversions. Students should write °C, °F, and K correctly.
Q1. What Are The Three Temperature Scales?
The three common temperature scales are Celsius, Fahrenheit, and Kelvin. Each scale uses a different unit symbol.
- Celsius scale uses degree Celsius.
- Fahrenheit scale uses degree Fahrenheit.
- Kelvin scale uses kelvin.
Q2. What Is The SI Unit Of Temperature?
The SI unit of temperature is kelvin. Its symbol is K.
Do not write a degree sign with K. Write 300 K, not 300 °K.
Q3. How Do You Convert Celsius To Kelvin?
Temperature in kelvin equals temperature in degree Celsius plus 273.15. This conversion connects Celsius and Kelvin.
- Given Data:
Temperature in Celsius = C
- Formula Used:
Temperature in Kelvin = Temperature in Celsius + 273.15
K = C + 273.15
- Example Calculation:
If temperature = 37.0 °C
K = 37.0 + 273.15
K = 310.15
- Final Result:
37.0 °C = 310.15 K
Q4. What Is 37.0 °C Equal To On The Fahrenheit Scale?
37.0 °C is equal to 98.6 °F. This is the normal body temperature value used in Fahrenheit.
Some digital thermometers show body temperature in °F. That is why normal temperature may appear as 98.6 °F.
Q5. How Should Students Write Temperature Units Correctly?
Students should leave a space between the number and the unit. Unit symbols should appear as °C, °F, or K.
Correct examples are 37.0 °C, 98.6 °F, and 310.15 K. Do not write a full stop after a unit symbol.
Celsius Fahrenheit Kelvin Class 6 Questions
Celsius Fahrenheit Kelvin Class 6 questions help students avoid unit confusion. These three scales appear in thermometer readings and scientific work.
Q1. What Is Degree Celsius?
Degree Celsius is the unit of temperature on the Celsius scale. Its symbol is °C.
Clinical thermometers commonly use the Celsius scale. Laboratory thermometers also usually show Celsius markings.
Q2. What Is Degree Fahrenheit?
Degree Fahrenheit is the unit of temperature on the Fahrenheit scale. Its symbol is °F.
A normal body temperature of 37.0 °C equals 98.6 °F. Some digital thermometers show this scale.
Q3. What Is Kelvin?
Kelvin is the SI unit of temperature. Its symbol is K.
Scientific work often uses kelvin. The word kelvin starts with a lowercase letter in full form.
Q4. What Is Absolute Zero?
Absolute zero is the lowest possible temperature according to scientific understanding. It is close to -273.15 °C.
On the Kelvin scale, this equals 0 K. No degree sign appears with kelvin.
Q5. Why Do Temperature Scale Names Start With Capital Letters?
Temperature scale names start with capital letters because they come from scientists’ names. Celsius, Fahrenheit, and Kelvin honour those scientists.
Their unit symbols also use capital letters. The unit kelvin in full form starts with lowercase k.
Temperature And Its Measurement Class 6 Questions On Clinical Thermometer
Temperature And Its Measurement Class 6 Questions on clinical thermometers focus on body temperature. Students should know use, cleaning, precautions, and normal readings.
Q1. What Is A Clinical Thermometer?
A clinical thermometer measures human body temperature. Digital clinical thermometers show the temperature on a display.
They work with batteries and heat sensors. They measure temperature when placed in contact with the body.
Q2. What Is Normal Human Body Temperature?
Normal human body temperature is taken as 37.0 °C or 98.6 °F. This value is an average for healthy people.
A healthy person may show a slightly different reading. Age, time of day, and activity level can affect body temperature.
Q3. Why Are Digital Thermometers Safer Than Mercury Thermometers?
Digital thermometers are safer because they do not contain toxic mercury. Mercury can cause danger if a thermometer breaks.
Digital thermometers also show numbers clearly. This makes reading easier for students and adults.
Q4. What Precautions Should Students Take With A Digital Clinical Thermometer?
Students should clean the thermometer tip before and after use. They should also read the instruction manual.
Keep the display away from water while washing. Do not hold the thermometer by the tip.
Q5. Where Can A Digital Clinical Thermometer Be Placed?
A digital clinical thermometer can be placed under the tongue for body temperature. It can also be placed in the armpit.
Armpit readings are about 0.5 °C to 1 °C lower than actual body temperature. This matters during fever checks.
Clinical Thermometer Class 6 Questions
Clinical Thermometer Class 6 Questions often test fever reading and safe thermometer use. Students should remember that clinical thermometers have a limited body-temperature range.
Q1. Why Can A Clinical Thermometer Not Measure Boiling Water?
A clinical thermometer cannot measure boiling water because boiling water lies outside its temperature range. It is designed for body temperature.
Human body temperature normally stays between 35 °C and 42 °C. Boiling water is far hotter.
Q2. Can A Clinical Thermometer Measure Ice Temperature?
A clinical thermometer cannot measure ice temperature because ice is outside its range. It is made for human body temperatures.
Ice temperature can be much lower than the clinical thermometer range. A laboratory thermometer suits such measurements.
Q3. What Is A Non-Contact Thermometer?
A non-contact thermometer measures temperature without touching the body. It is also called an infrared thermometer.
Such thermometers were used during the COVID-19 pandemic. They reduce contact and disease spread.
Q4. Why Should The Thermometer Tip Be Washed?
The thermometer tip should be washed to keep it clean before and after use. It touches the body during measurement.
Soap and water help clean the tip. The digital display should stay away from water.
Q5. Why Is Pulse Rate Not A Reliable Fever Indicator?
Pulse rate alone is not a reliable fever indicator because other situations also affect pulse rate. Fever can change pulse rate.
Activity, fear, and other conditions may also affect pulse. A thermometer gives a better measurement.
Class 6 Science Temperature Measurement Questions On Laboratory Thermometer
Class 6 Science Temperature Measurement Questions on laboratory thermometers focus on experiments. These thermometers can measure a wider range than clinical thermometers.
Q1. What Is A Laboratory Thermometer?
A laboratory thermometer measures temperature in laboratory activities and experiments. It usually has a long glass tube and a bulb.
The bulb contains liquid. The liquid column rises or falls as temperature changes.
Q2. What Is The Usual Range Of A Laboratory Thermometer?
The usual range of a laboratory thermometer is -10 °C to 110 °C. This range suits many school experiments.
It can measure ice and warm water. It can also measure boiling water carefully under teacher supervision.
Q3. Why Can A Laboratory Thermometer Not Measure Body Temperature?
A laboratory thermometer is not used for body temperature because it is not designed for safe body use. It may break easily.
It also needs reading while still in contact with the measured substance. A clinical thermometer suits body temperature.
Q4. What Liquid Does A Laboratory Thermometer Usually Contain?
A laboratory thermometer generally contains alcohol or mercury. Alcohol is often coloured red to make it visible.
The liquid column moves with temperature changes. Students read the mark matching the liquid level.
Q5. What Precautions Should Students Take With A Laboratory Thermometer?
Students should handle a laboratory thermometer carefully and avoid holding it by the bulb. It can break if it hits a hard object.
The bulb should not touch the beaker bottom or sides. The thermometer should remain vertical.
Laboratory Thermometer Class 6 Important Questions On Reading
Laboratory Thermometer Class 6 Important Questions on reading help students avoid wrong measurements. Eye position, vertical placement, and immersion matter.
Q1. How Do You Find The Smallest Division Of A Thermometer?
Divide the temperature difference between two bigger marks by the number of smaller divisions. This gives the value of one small division.
- Given Data:
Temperature difference = 10 °C
Number of small divisions = 10
- Formula Used:
Smallest division = temperature difference ÷ number of divisions
- Calculation:
Smallest division = 10 °C ÷ 10
Smallest division = 1 °C
- Final Result:
Smallest division = 1 °C
Q2. How Should Students Read A Laboratory Thermometer Correctly?
Students should read the thermometer while it remains immersed in the liquid. The eye should align with the liquid column level.
The thermometer should stay vertical. The bulb should not touch the beaker bottom or sides.
Q3. Why Must The Temperature Be Read While The Thermometer Is Immersed?
The reading must be taken while immersed because the liquid column starts changing after removal. It may fall quickly.
If students remove the thermometer first, the reading can become wrong. Wrong measurements give incorrect conclusions.
Q4. Why Should The Bulb Not Touch The Beaker Bottom?
The bulb should not touch the beaker bottom because it may read the beaker’s temperature instead of water temperature. This can cause error.
The bulb should remain surrounded by water. This gives a better water temperature reading.
Q5. How Do You Read A Thermometer With 50 Divisions Between 0 °C And 100 °C?
Each division measures 2 °C. Divide the total temperature difference by the number of divisions.
- Given Data:
Temperature difference = 100 °C - 0 °C
Temperature difference = 100 °C
Number of divisions = 50
- Formula Used:
Value of one division = temperature difference ÷ number of divisions
- Calculation:
Value of one division = 100 °C ÷ 50
Value of one division = 2 °C
- Final Result:
Each division = 2 °C
Temperature Class 6 Science Questions On Hot Or Cold
Temperature Class 6 Science Questions on hot and cold build the base of the chapter. Students should understand why touch gives only an estimate.
Q1. What Did Activity 7.1 Show About Touch?
Activity 7.1 showed that touch cannot always judge hotness or coldness correctly. The same water may feel different to two hands.
One hand first stays in warm water. The other hand first stays in ice-cold water.
Q2. Why Did Water In Container B Feel Different To Both Hands?
Water in container B felt different because both hands had different previous temperature experiences. One hand adjusted to warm water.
The other hand adjusted to ice-cold water. This made the same tap water feel different.
Q3. What Is The Difference Between Hot And Cold Bodies?
A hot body has higher temperature than a cold body. Temperature gives the comparison.
Warm water has higher temperature than ice-cold water. A thermometer can show this difference.
Q4. Why Is Temperature Better Than Touch?
Temperature is better than touch because it gives a measured value. Touch gives only a feeling.
A thermometer can show 37.0 °C or 40.0 °C. Such readings help in health and science activities.
Q5. What Does “Wrong Measurements Are Worse Than No Measurements” Mean?
It means a wrong reading can lead to a wrong decision. Accurate measurement matters in science and health.
Anna Mani’s quote fits this chapter. It reminds students to measure carefully.
Air Temperature Class 6 Science Questions
Air Temperature Class 6 Science Questions connect temperature with weather reports. Students should observe maximum and minimum temperature over several days.
Q1. What Is Air Temperature?
Air temperature is the temperature of the air around us. Weather reports often mention maximum and minimum air temperature.
A room thermometer gives an approximate idea of room temperature. Weather stations use more systematic methods.
Q2. Why Do Maximum And Minimum Temperatures Change Daily?
Maximum and minimum temperatures change daily because weather depends on several factors. Sunlight, season, clouds, and wind affect air temperature.
Temperatures usually rise near summer. They usually fall near winter.
Q3. What Is Maximum Air Temperature?
Maximum air temperature is the highest air temperature recorded during a day. Weather reports mention it for daily conditions.
It usually occurs when the day becomes warmer. The exact time can vary.
Q4. What Is Minimum Air Temperature?
Minimum air temperature is the lowest air temperature recorded during a day. It shows the coolest part of the day.
It often occurs during early morning hours. Weather reports record it with maximum temperature.
Q5. Who Was Anna Mani?
Anna Mani was an Indian scientist known as the Weather Woman of India. She built many weather measurement instruments.
Her work reduced India’s reliance on other countries. She also studied wind and solar energy.
Important Questions Class 6 Science Chapter 7 Extra Questions
Important Questions Class 6 Science Chapter 7 Extra Questions help students practise NCERT exercise-based reasoning. These answers follow CBSE 2026 concepts.
Q1. What Is The Normal Temperature Of A Healthy Human Being?
The normal temperature of a healthy human being is close to 37.0 °C. This equals 98.6 °F.
Correct option: 37.0 °C
Q2. What Is 37 °C Equal To In Fahrenheit?
37 °C is equal to 98.6 °F. This is the normal body temperature value in Fahrenheit.
Correct option: 98.6 °F
Q3. Fill In The Blank: Hotness Or Coldness Is Determined By What?
The hotness or coldness of a system is determined by its temperature. Temperature gives a reliable measured value.
Answer: temperature
Q4. What Is The Usual Range Of A Laboratory Thermometer?
The usual range of a laboratory thermometer is -10 °C to 110 °C. This range suits many school experiments.
Correct option: -10 °C to 110 °C
Q5. Which Thermometer Should Measure 22.5 °C?
Use the thermometer that has markings fine enough to read 22.5 °C. The smallest division should allow half-degree reading.
A thermometer with 0.5 °C smallest division works better. A 1 °C thermometer cannot show 22.5 °C accurately.
Class 6 Science Chapter 7 Questions And Answers From NCERT Exercises
Class 6 Science Chapter 7 Questions And Answers from NCERT exercises include MCQs, thermometer readings, and data interpretation. These solved answers help quick revision.
Q1. What Was Vaishnavi’s Highest Recorded Temperature?
Vaishnavi’s highest recorded temperature was 40.0 °C. It appeared in the three-day record.
- Given Data:
Day One readings include 38.0 °C, 37.8 °C, 38.0 °C, 38.0 °C, 40.0 °C, 39.0 °C
Day Two readings include 38.6 °C, 38.8 °C, 39.0 °C, 39.0 °C, 39.0 °C, 38.0 °C
Day Three readings include 37.6 °C, 37.4 °C, 37.2 °C, 37.0 °C, 36.8 °C, 36.6 °C
- Formula Used:
Highest recorded temperature = largest value in the table
- Calculation:
Largest value = 40.0 °C
- Final Result:
Highest recorded temperature = 40.0 °C
Q2. When Was Vaishnavi’s Highest Temperature Recorded?
Vaishnavi’s highest temperature was recorded on Day One at 7 pm. The reading was 40.0 °C.
- Given Data:
Highest temperature = 40.0 °C
- Table Check:
Day One, 7 pm = 40.0 °C
- Final Result:
Day One at 7 pm
Q3. On Which Day Did Vaishnavi’s Temperature Return To Normal?
Vaishnavi’s temperature returned to normal on Day Three. The readings moved near and below 37.0 °C.
Normal body temperature is taken as 37.0 °C. Day Three readings show recovery towards normal.
Q4. Does 101 Degrees Mean Celsius Or Fahrenheit?
101 degrees means Fahrenheit in a fever context. A body temperature of 101 °C is impossible for a living human.
Human body temperature does not normally go below 35 °C or above 42 °C. So Komal means 101 °F.
Q5. Why Was Boiling Water Around 98 °C In Shillong?
Boiling water can measure around 98 °C in Shillong because boiling temperature changes with place conditions. Readings can also vary by method.
The textbook table shows values near 98 °C. Correct thermometer use also affects the final reading.
Temperature Measurement Class 6 Extra Questions
Temperature Measurement Class 6 Extra Questions test calculation and thermometer reading skills. Students should show steps clearly in copyable format.
Q1. Convert 25 °C Into Kelvin.
25 °C equals 298.15 K. Add 273.15 to convert Celsius to Kelvin.
- Given Data:
Temperature in Celsius = 25 °C
- Formula Used:
Temperature in Kelvin = Temperature in Celsius + 273.15
- Calculation:
Temperature in Kelvin = 25 + 273.15
Temperature in Kelvin = 298.15 K
- Final Result:
25 °C = 298.15 K
Q2. Convert 37.0 °C Into Kelvin.
37.0 °C equals 310.15 K. This is the Kelvin value for normal body temperature.
- Given Data:
Temperature in Celsius = 37.0 °C
- Formula Used:
Temperature in Kelvin = Temperature in Celsius + 273.15
- Calculation:
Temperature in Kelvin = 37.0 + 273.15
Temperature in Kelvin = 310.15 K
- Final Result:
37.0 °C = 310.15 K
Q3. What Is The Smallest Division If 10 Divisions Lie Between 10 °C And 20 °C?
The smallest division is 1 °C. The 10 °C gap has 10 equal divisions.
- Given Data:
Temperature difference = 20 °C - 10 °C
Temperature difference = 10 °C
Number of divisions = 10
- Formula Used:
Smallest division = temperature difference ÷ number of divisions
- Calculation:
Smallest division = 10 °C ÷ 10
Smallest division = 1 °C
- Final Result:
Smallest division = 1 °C
Q4. What Is The Actual Body Temperature If Armpit Reading Is 36.3 °C?
The actual body temperature may be about 36.8 °C to 37.3 °C. Armpit reading is lower than actual body temperature.
- Given Data:
Armpit reading = 36.3 °C
Difference = 0.5 °C to 1 °C lower
- Formula Used:
Actual body temperature = armpit reading + 0.5 °C to 1 °C
- Calculation:
Lower estimate = 36.3 °C + 0.5 °C = 36.8 °C
Higher estimate = 36.3 °C + 1.0 °C = 37.3 °C
- Final Result:
Actual body temperature may be 36.8 °C to 37.3 °C
Q5. Why Can Two Students Get Different Laboratory Thermometer Readings?
Two students may get different readings due to wrong eye level, tilted thermometer, or delayed reading. The bulb position can also affect accuracy.
The reading must be taken while immersed. The eye must align with the liquid column level.
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