What is the difference the secondary structure and tertiary structure of a protein?

Secondary Structure
The secondary structure of a protein refers to the basic foldings of a protein the forms of:
1. an alpha helix
2. a beta-pleated sheet
These foldings are determined by hydrogen bonds. These hydrogen bond form between the N-H bond and the C=O bonds of adjacent amino acids. 
Tertairy Structure:
The tertiary structure of a protein refers to more extensive foldings of a protein giving it a more unique shape.
These folding are determined by the interations of R groups with other amino acids and its environment.
These interactions include:
o Disulfide bridges
o Ionic bonds
o Hydrophillic anf hydrophobic interactions
o Extra hydrogen bonds (formed by R groups only)