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Mindmap: Heat | Science Class 7 PDF Download
The document Mindmap: Heat | Science Class 7 is a part of the Class 7 Course Science Class 7.
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FAQs on Mindmap: Heat - Science Class 7
| 1. What is heat? |  |
Ans. Heat is a form of energy that is transferred between objects or systems due to a difference in temperature. It is the energy associated with the random motion of atoms and molecules within a substance.
| 2. How is heat measured? | |
Ans. Heat is measured in units of energy, such as calories or joules. The most commonly used unit of heat is the calorie, which is the amount of heat required to raise the temperature of one gram of water by one degree Celsius. Another commonly used unit is the joule, where one calorie is equal to 4.184 joules.
| 3. What are the different methods of heat transfer? | |
Ans. There are three main methods of heat transfer: conduction, convection, and radiation. Conduction is the transfer of heat through direct contact between objects or substances. Convection is the transfer of heat through the movement of fluids, such as air or water. Radiation is the transfer of heat through electromagnetic waves, such as heat from the sun.
| 4. How does heat affect the state of matter? | |
Ans. Heat can change the state of matter. When heat is added to a substance, it can cause solid substances to melt into liquid form, and liquids to vaporize into gas form. Conversely, when heat is removed from a substance, it can cause gases to condense into liquid form and liquids to freeze into solid form.
| 5. How does heat transfer occur in everyday life? | |
Ans. Heat transfer occurs in various ways in our daily lives. For example, when we touch a hot stove, heat is transferred to our hand through conduction. When we feel a breeze on a hot day, heat is transferred through convection as the air moves. Additionally, we receive heat from the sun through radiation, which warms the Earth's surface.
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Document Description: Mindmap: Heat for Class 7 2024 is part of Science Class 7 preparation.
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