Matter can exist in four states: solid, liquid, gas, or plasma. Solids have a definite shape and volume due to the close packing and strong attraction between particles. Liquids have a definite volume but take the shape of their container due to weaker intermolecular forces. Gases have no definite shape or volume as the particles are spaced far apart and move randomly in any direction. Plasma is similar to gas but with such high energy that some electrons have been stripped from atoms and ions are produced. Matter can change between these states through processes like melting, freezing, evaporation, condensation, and sublimation which involve changes in temperature, pressure, or other conditions.

1. MATTER

5. Matter has ___________.
A. no mass but occupies space
B. mass but occupies no space
C. mass and occupies space
D. no mass and occupies no space

6. The gaseous form of water is called as
_______.
A. water gas
B. water vapour
C. fog
D. snow

7. The state of matter with only one free
surface is _______
A. liquid
B. gas
C. solid
D. plasma

8. In gases, particles vibrate _________
A. about their mean position
B. about a vertical axis
C. about a horizontal axis
D. in any direction

9. A solid has _________.
A. maximum intermolecular space
B. definite mass but no definite volume
C. very high compressibility
D. maximum intermolecular force of attraction

10. Conversion of gas to liquid is called
_________.
A. condensation
B. sublimation
C. vapourisation
D. solidification

11. The process by which wet clothes dry
up is called _______
A. evaporation
B. boiling
C. condensation
D. solidification

12. Matter changes from one state to
another with change in _________.
A. density
B. temperature
C. volume
D. height

13. The process of a solid changing into
liquid is called ___________
A. liquefaction
B. melting
C. freezing
D. solidification

14. 1. When a solid changes to a liquid it is called what? Melting
2. True or false? Liquids are easy to compress.
3. When a gas changes into a liquid it is called what? Condensation
4. True or false? The particles of a gas are packed tightly together.
5. When solids reach their melting points they become what? Liquid
6. When a gas reaches its condensation point it becomes a what? Liquid
7. True or false? Solids do not take the shape of the container they are in.
8. What is it called when a solid changes directly into a gas? Sublimination
9. True or false? Gases are hard to compress.