Question

Q: Class-9 NCERT Science book Lesson-1 (Matter in our surroundings) detailed summry ?
: for exam preparation .​

Answer 1

Explanation:

solids:

• solids have fixed shape.
• have fixed volume.
• hardly be compared on applying pressure.
• negligible kainatic energy.
• don't haven't property of diffusion.

liquids:

• don't have fixed shape.
• occupy defent shape.
• property of fluidity.
• lesser density. compared to solid.
• easily diffuse.

gaseous:

• don't have fixed shape.
• have maximum fluidity.
• diffuse very fast.

K =°C+ 273

F =9/5°C+32

factors affecting evaporation are:

1. surface area
2. temperature
3. wind speed
4. humidity
5. boiling point

And definition of sublimation and evoparation is important!