2. Combine the words in brackets with suitable SUFFIXES to complete the sentences. Choose from the following suffixes:
-er, -or, -ing, -ion, -ness, -ity

1. A (boil) is a closed vessel in which water or other fluid is heated.
2. (compress) is the reduction in size of data in order to save space or
transmission time.
3. In chemistry, the (dense) of many substances is compared to
the (dense) of water.
4. (transmit) is the act of passing something on.
5. (hard) is the characteristic of a solid material expressing its resistance to
permanent deformation.
6. Combustion process is also called (heat).