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 1.7 Class 9 Science Explanation with a conclusion. You can also go through Class 9 Maths Chapter 6- Lines and Angles.
NCERT Activity 1.7 Class 9 Science Explanation with a conclusion
You are suggested to study
NCERT activity 1.7 class 9 science explanation with a conclusion so that you can
attempt questions based on the activity 1.7 class 9 science.
Activity 1.7 Class 9 Science
· Take an iron nail, a piece of chalk, and a rubber band
· Try breaking them by hammering, cutting, stretching
· In which of the above three substances do you think the particles are held together with greater force?
Observation Activity 1.7 Class 9 Science
When we try to
break an iron nail, chalk, and rubber band, we find that iron nails can’t be
broken but chalk can be broken easily and the rubber band can be stretched long.
A strong force
is needed to break an iron nail whereas chalk is broken with a weak or light
force.
Explanation Activity 1.7 Class 9 Science
All substance
or matter is made up of small particles and these particles have the force of
attraction between them. The Force of attraction between particles in different
substances is different.
In this
activity, the force of attraction between particles of nails is strongest and
lowest in chalk.
Rubber has a long
chain of molecules and a covalent bond is present between these particles so
rubber is elastic.
Conclusion Activity 1.7 Class 9 Science
The Force of
attraction between particles is different in different substances.
Related Topics
1. Next Activity- Activity 1.8 Class 9 Science
2. Previous Activity - Activity 1.6 Class 9 Science
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