What are the three interactions that can occur when amino acids are close to each other?

Charged amino acid side chains can form ionic bonds, and polar amino acids are capable of forming hydrogen bonds. Hydrophobic side chains interact with each other via weak van der Waals interactions. ... When connected together by a series of peptide bonds, amino acids form a polypeptide, another word for protein.

They formed the oceans.  as they melted water was formed and the water made the oceans