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 1.9 Class 9 Science Explanation with a conclusion.
NCERT Activity 1.9 Class 9 Science Explanation with a conclusion
You are suggested to study
NCERT activity 1.9 class 9 science explanation with a conclusion so that you can
attempt questions based on the activity 1.9 class 9 science.
Activity 1.9 Class 9 Science
· Collect the following articles- a pen, a book, a needle, and a piece of wooden stick
· Sketch the shape of the above articles in your notebook by moving a pencil around them.
· Do all these have a definite shape, distinct, boundaries, and a fixed volume?
· What happens if they are hammered, pulled, or dropped?
· Are these capable of diffusing into each other?
· Try compressing them by applying force. Are you able to compress them?
Observation Activity 1.9 Class 9 Science
A pen, a book, a
needle and a piece of the wooden stick have fixed shapes and sizes. These articles
have distinct boundaries and a volume.
All these
articles are rigid. They can not be compressed and they have a definite shape,
fixed volume, and distinct boundaries.
Explanation Activity 1.9 Class 9 Science
The shape and size
of substances depend upon the force of attraction between particles. If the force
of attraction is strong between particles, then the substance must be solid and
its shape and size are fixed. Due to this force, they have distinct boundaries
and volume.
When these
articles are hammered, they can be broken but can’t be compressed.
Conclusion Activity 1.9 Class 9 Science
Particles of
solids are rigid and have a definite volume, shape, and distinct boundaries.
Related Topics
1. Next Activity- Activity 1.10 Class 9 Science
2. Previous Activity - Activity 1.8 Class 9 Science
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