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Questions and Answers
What is the main purpose of the suggested activity where students form human chains?
Which characteristic is suggested to be exhibited by the particles of matter based on the text?
Why does the smell of hot sizzling food reach you from a distance?
Which activity from the text is most likely demonstrating the concept of cohesion?
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What is implied about the particles of love based on the text?
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In which group would the particles most likely be held together with the least force according to the text?
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What is the key observation from the activity involving breaking a stream of water with fingers?
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Based on the text, what can be inferred about the smell of perfume?
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Why do you need to go close to cold food to smell it, according to the text?
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Study Notes
Characteristics of Particles of Matter
- Particles of matter are extremely small and can be divided into smaller particles, as seen in the experiment with potassium permanganate.
- Even with repeated dilution, the particles of matter can still be detected, indicating their small size.
- The experiment with potassium permanganate shows that millions of particles can be present in just a few crystals.
Space Between Particles of Matter
- Particles of matter have space between them, as observed in activities 1, 1.2, and 1.3.
- Evenly distribution of particles occurs when sugar, salt, Dettol, or potassium permanganate are added to water.
Movement of Particles
- Particles of matter are continuously moving, as seen in the experiment with incense stick.
- The movement of particles increases with temperature, as observed in activity 1.5.
- The rate of mixing changes with temperature, with hotter temperatures increasing the rate of mixing.
Interactions Between Particles
- Particles of matter interact with each other, as observed in activities 1.3, 1.4, and 1.5.
- The force of interaction between particles increases with kinetic energy.
- Particles with high kinetic energy move faster and mix more quickly.
Observations and Conclusions
- In activity 1.3, the smell of Dettol can be detected even after repeated dilution, indicating the small size of particles.
- In activity 1.4, ink and honey diffuse slowly through water, demonstrating the movement of particles.
- In activity 1.5, the crystals of copper sulphate or potassium permanganate settle at the bottom of the glass, and the particles move and mix with the surrounding water.
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Description
Test your knowledge on the experiment from Activity 1.3 of your Chemistry class where you dilute a solution multiple times and estimate the size of particles. See how well you understand the concepts of solution dilution and particle size estimation.
