Class 8 Exam > Class 8 Questions > What happens to the density of a substance wh... Start Learning for Free
What happens to the density of a substance when it is heated?
- a)It always decreases
- b)It remains unchanged
- c)It always increases
- d)It may increase or decrease depending on the substance
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
What happens to the density of a substance when it is heated?a) It alw...
Understanding Density and Temperature
When a substance is heated, its density can change based on its physical properties and phase transitions. Here's a breakdown of how heating affects density:
What is Density?
- Density is defined as mass per unit volume (Density = Mass/Volume).
- It measures how tightly packed the particles of a substance are.
Effects of Heating on Density
- When most substances are heated, they expand.
- Expansion usually leads to an increase in volume, which can result in decreased density if mass remains constant.
Behavior of Different Substances
- Solids and Liquids:
- For most solids and liquids, heating causes expansion, leading to a decrease in density.
- Gases:
- Gases tend to expand significantly when heated, resulting in a more noticeable decrease in density.
- Exceptions:
- Water is a notable exception; it expands upon freezing, causing ice (solid water) to be less dense than liquid water. This is why ice floats.
Conclusion
- The statement that heating a substance may either increase or decrease its density is accurate.
- The outcome depends on the substance's characteristics and whether it undergoes a phase change during heating.
In summary, while heating generally reduces density for most materials, some exceptions exist, highlighting the complexity of material behavior under temperature changes.
When a substance is heated, its density can change based on its physical properties and phase transitions. Here's a breakdown of how heating affects density:
What is Density?
- Density is defined as mass per unit volume (Density = Mass/Volume).
- It measures how tightly packed the particles of a substance are.
Effects of Heating on Density
- When most substances are heated, they expand.
- Expansion usually leads to an increase in volume, which can result in decreased density if mass remains constant.
Behavior of Different Substances
- Solids and Liquids:
- For most solids and liquids, heating causes expansion, leading to a decrease in density.
- Gases:
- Gases tend to expand significantly when heated, resulting in a more noticeable decrease in density.
- Exceptions:
- Water is a notable exception; it expands upon freezing, causing ice (solid water) to be less dense than liquid water. This is why ice floats.
Conclusion
- The statement that heating a substance may either increase or decrease its density is accurate.
- The outcome depends on the substance's characteristics and whether it undergoes a phase change during heating.
In summary, while heating generally reduces density for most materials, some exceptions exist, highlighting the complexity of material behavior under temperature changes.
Free Test
FREE
| Start Free Test |
Community Answer
What happens to the density of a substance when it is heated?a) It alw...
Generally, the density of a substance decreases when it is heated because its volume tends to increase. However, water is an exception, as its density increases when heated from 0°C to 4°C before decreasing at higher temperatures.
 | Explore Courses for Class 8 exam |  |
Top Courses for Class 8View all
Top Courses for Class 8
Question Description
What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer? for Class 8 2026 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 8 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer?.
What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer? for Class 8 2026 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 8 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer?.
Solutions for What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 8. Download more important topics, notes, lectures and mock test series for Class 8 Exam by signing up for free.
Here you can find the meaning of What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice What happens to the density of a substance when it is heated?a) It always decreasesb) It remains unchangedc) It always increasesd) It may increase or decrease depending on the substanceCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 8 tests.
| Explore Courses for Class 8 exam | |
Top Courses for Class 8
Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
