17. it is a change in form of a substance without change its identity.
a. properties
b. condensation
c. matter
d. phase

18. it is a change in liquid to solid
a. deposition
b. condensation
c. evaporation
d. solidification

19. ionized gas-both volume and shape are variable.
a. plasma
b. matter
c. evaporation
d. freezing

20. both volume and shape are variable
a. deposition
b. phase
c. gas
d. matter ​