5. 1.It helps to organize things in
a way that is easy to find.
2.To allow the systematic
study of objects.
6.
7.
8.
9.
10.
11.
12.
13. • The force of attraction between the
particles is very strong.
•The molecules are tightly packed.
•There is less space between the molecules
•So the molecules can move very little only.
14. •The force of attraction between
the particles is weak.
•The molecules are loosely
packed.
•There is comparatively more
space between the molecules.
•So the molecules can slide over
other, but stay together.
15. •The force of attraction between
the particles is very weak.
•The molecules are very loosely
packed.
•So the molecules are very far from
each other.
•So the movement of molecules is
free.
