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Chapter-Chapter 6. Materials Around Us Science Curiosity class 6 in english Medium CBSE Notes
CBSE Class 6 Science Curiosity Notes in English Medium based on latest NCERT syllabus, covering definitions, diagrams, formulas, and exam-oriented explanations.
Chapter 6. Materials Around Us
CBSE Notes - Key Points
Chapter 7. Temperature and its Measurement
These CBSE Key Points are prepared according to the latest NCERT Curiosity textbook and CBSE competency-based pattern. They provide quick revision of important concepts, scientific terms, facts, and formulae that are frequently asked in school examinations.
CBSE Notes – Key Points
This section highlights the most important concepts of the chapter in an easy-to-revise format. Students should go through these points before examinations to strengthen their conceptual understanding and improve retention.
What is Temperature?
Temperature is the measure of the degree of hotness or coldness of a body. It helps us compare how hot or cold one object is with another. Temperature is measured using a thermometer and is expressed in different temperature scales.
Important Keywords
The following scientific terms are frequently used in this chapter and should be remembered for examinations.
| Keyword | Meaning |
|---|---|
| Temperature | Measure of the hotness or coldness of a body. |
| Thermometer | An instrument used to measure temperature. |
| Clinical Thermometer | A thermometer used to measure human body temperature. |
| Laboratory Thermometer | A thermometer used for scientific experiments. |
| Celsius Scale | Commonly used temperature scale represented by °C. |
| Fahrenheit Scale | Temperature scale represented by °F. |
| Kelvin Scale | SI temperature scale represented by K. |
| Infrared Thermometer | A non-contact thermometer that measures temperature from a distance. |
| Air Temperature | The temperature of the surrounding atmosphere. |
| Heat Sensor | An electronic device that detects temperature changes in digital thermometers. |
Important Definitions
Learning the following definitions will help students answer one-mark and competency-based questions effectively.
| Term | Definition |
|---|---|
| Temperature | The degree of hotness or coldness of a body. |
| Thermometer | An instrument used to measure temperature accurately. |
| Clinical Thermometer | A thermometer specially designed to measure human body temperature. |
| Laboratory Thermometer | A thermometer used to measure the temperature of liquids and other substances in laboratories. |
| Kelvin | The SI unit of temperature. |
Types of Thermometers
Different thermometers are designed for different purposes. Students should know their uses and major differences.
| Thermometer | Used For | Main Feature |
|---|---|---|
| Clinical Thermometer | Human body | Measures body temperature accurately. |
| Digital Clinical Thermometer | Human body | Electronic, safe and easy to read. |
| Laboratory Thermometer | Experiments | Measures a wide range of temperatures. |
| Room Thermometer | Indoor air | Measures surrounding air temperature. |
| Infrared Thermometer | Body without contact | Measures temperature from a distance. |
Temperature Scales
Scientists use different temperature scales depending on the purpose of measurement.
| Scale | Symbol | Common Use |
|---|---|---|
| Celsius | °C | Daily life and school science. |
| Fahrenheit | °F | Used in some countries. |
| Kelvin | K | Scientific research and SI unit. |
Important Scientific Facts
Remember these facts carefully as they are frequently asked in objective and short-answer questions.
- Temperature tells us how hot or cold an object is.
- Our sense of touch cannot accurately judge temperature.
- A thermometer provides accurate temperature measurement.
- The average normal human body temperature is 37°C (98.6°F).
- The SI unit of temperature is kelvin (K).
- Digital thermometers use electronic heat sensors.
- Mercury thermometers are being replaced because mercury is poisonous.
- Clinical thermometers are used only for measuring body temperature.
- Laboratory thermometers measure temperatures of liquids and other substances.
- Air temperature changes with weather and seasons.
Clinical Thermometer vs Laboratory Thermometer
The following comparison helps students understand the differences between the two commonly used thermometers.
| Clinical Thermometer | Laboratory Thermometer |
|---|---|
| Measures body temperature. | Measures temperature of liquids and materials. |
| Used by doctors and at home. | Used in laboratories. |
| Limited temperature range. | Wide temperature range. |
| Suitable for medical purposes. | Suitable for scientific experiments. |
Precautions While Using a Clinical Thermometer
Following these precautions ensures safe and accurate measurement of body temperature.
- Read the instruction manual before use.
- Wash the thermometer tip before and after every use.
- Keep the display unit away from water.
- Do not hold the thermometer by its tip.
- Wait for the beep before reading the temperature.
Precautions While Using a Laboratory Thermometer
These precautions help in obtaining correct temperature readings during experiments.
- Handle the thermometer carefully.
- Keep it in a vertical position.
- Do not allow the bulb to touch the container.
- Read the temperature while the thermometer is immersed.
- Take the reading at eye level.
Applications of Temperature Measurement
Temperature measurement is used in many fields of science and everyday life.
- Diagnosing fever.
- Scientific laboratory experiments.
- Weather forecasting.
- Food storage and refrigeration.
- Industrial manufacturing.
- Agriculture.
- Medical research.
- Environmental monitoring.
- Cooking and baking.
- Renewable energy studies.
Quick Revision
Revise these important points before your examination.
- Temperature is the measure of hotness or coldness.
- Thermometers are used to measure temperature.
- Clinical thermometers measure body temperature.
- Laboratory thermometers are used in experiments.
- 37°C = 98.6°F.
- Kelvin (K) is the SI unit of temperature.
- Touch cannot accurately determine temperature.
- Digital thermometers are safer than mercury thermometers.
- Laboratory thermometers should be read while immersed in the liquid.
- Temperature plays an important role in healthcare, science, industries, and weather forecasting.
See other sub-topics of this chapter:
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