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Wednesday, June 1, 2022

Explain NCERT activity 1.5 Class 9 Science with a conclusion

In this post, you will find NCERT Science Class 9 Chapter 1 Activity solutions. In Class 9 science chapter 1 matter in our surroundings consists of NCERT Activity 1.5 Class 9 Science Explanation with a conclusion. you can also go through Class 9 Maths Chapter 6- Lines and Angles


NCERT Activity 1.5 Class 9 Science Explanation with a conclusion

You are suggested to study NCERT activity 1.5 class 9 science explanation with a conclusion so that you can attempt questions based on the activity 1.5 class 9 science.

 

Activity 1.5 Class 9 Science


·     Drop a crystal of copper sulphate or potassium permanganate into a glass of hot water and another containing cold water. Do not stir the solution.

·     Allow the crystal to settle at the bottom.

·     What do you observe just above the solid crystal in the glass?

·     What happens as time passes?

·     What does this suggest about the particles of solid and liquid?

·     Does the rate of mixing change with temperature? Why and how?

Explain NCERT activity 1.5 Class 9 Science with a conclusion


Observation Activity 1.5 Class 9 Science

 

The crystal KMnO4 moves down in both beakers. The purple colour of potassium permanganate spreads in the water of both beakers as time passed.

The purple colour spreads slowly in cold water but spreads quickly in hot water.


Explanation Activity 1.5 Class 9 Science

 

 Particles of substances have kinetic energy. When we heat a substance, the kinetic energy increases because attraction forces between particles become weak due to heat.

So, in hot water crystals dissolve quickly whereas dissolving slowly in cold water.


Conclusion Activity 1.5 Class 9 Science


We can conclude that at a higher temperature, the particles of matter move faster and have more kinetic energy.

We can check this activity ourselves at home. Add some sugar to hot water and cold water and try to dissolve. We see that sugar dissolves in hot water quickly but dissolves slowly in cold water.


Related Topics 

1. Next Activity-  Activity 1.6 Class 9 Science

2. Previous Activity - Activity 1.4 Class 9 Science

2. Solutions of Chapter 1 Class 9 Science