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Temperature Chapter Notes | Math Olympiad for Class 2 PDF Download
| Table of contents |
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| What is Temperature? |
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| Temperature Measurement Units |
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| Temperature Measuring Devices |
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| Reading a Thermometer |
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| Solved Questions |
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What is Temperature?
Temperature refers to the hotness or coldness of a body. Temperature is represented by the letter ‘T’. Temperature is a way to tell if something is hot or cold. When an object feels warm, we say it is hot, and when it feels cool, we say it is cold. So, we prefer hot tea or coffee in the winter and cold drinks in the summer. Objects that feel very warm are called hot objects. Hot objects have higher temperatures. Some examples of hot objects include sun, fire, tea, coffee, etc.
Objects that feel cool are called cold objects. Cold objects have lower temperatures. Some examples of cold objects include ice, ice creams, cold drinks, snow, etc.
Temperature Measurement Units
The Units of temperature are as follows:
- Celsius (°C)
- Fahrenheit (°F)
- Kelvin (K).
We use the degree symbol (°) in the measurement of temperature to denote degrees on various temperature scales like Celsius (°C) and Fahrenheit (°F) scales.
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Temperature Measuring Devices
We use a thermometer to measure the temperature of an object.
Reading a Thermometer
The rise and fall in the level of liquid mercury (red-marked) shows the rise and fall of temperature. The boiling point of water is 100°C which is marked on the thermometer. It is read as hundred degrees Celsius (100°C ).
The freezing point of ice is 0°C, which is marked on the below thermometer. It is read as zero degrees Celsius (0°C ).
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Chapter Notes: Temperature
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Solved Questions
Q1: How will you classify the temperature of water by looking at the below image?
(a) Cold
(b) Warm
(c) Freeze
(d) Hot
Ans: (d)
Sol: The temperature of boiling water is 100°C. So, the temperature of the water is classified as hot.
Q2: If the temperature of London is 27°C and the temperature of Boston is 16°C, which of the following statements is correct?
(a) London is 11°C hotter than Boston.
(b) London is 13°C hotter than Boston.
(c) London is 11°C colder than Boston.
(d) London is 13°C colder than Boston.
Ans: (a)
Sol: The difference in temperature = 27 − 16 = 11°C
The temperature in London is higher than the temperature in Boston. So, London is warmer than Boston. Hence, London is 11°C hotter than Boston.
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FAQs on Temperature Chapter Notes - Math Olympiad for Class 2
| 1. What is temperature and why is it important? |  |
| 2. What are the common units used to measure temperature? | |
Ans.The most common units for measuring temperature are Celsius (°C), Fahrenheit (°F), and Kelvin (K). Celsius is widely used in most countries, Fahrenheit is primarily used in the United States, and Kelvin is used in scientific contexts.
| 3. What devices are commonly used to measure temperature? | |
Ans.Common devices for measuring temperature include thermometers (such as digital, mercury, and alcohol thermometers), thermocouples, infrared thermometers, and temperature sensors. Each device has its specific applications and accuracy levels.
| 4. How do you read a thermometer correctly? | |
Ans.To read a thermometer correctly, hold it at eye level and ensure it is not tilted. For mercury or alcohol thermometers, look for the level of the liquid against the scale, making sure to read the measurement at the bottom of the meniscus. For digital thermometers, simply read the displayed temperature.
| 5. What are the effects of temperature on physical and chemical processes? | |
Ans.Temperature can significantly affect physical processes such as states of matter (solid, liquid, gas) and chemical reactions. Higher temperatures generally increase the rate of chemical reactions and can lead to changes in material properties, while lower temperatures may slow reactions and solidify substances.
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Document Description: Chapter Notes: Temperature for Class 2 2025 is part of Math Olympiad for Class 2 preparation.
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