Milk is something that mother animals make for their baby animals. People collect milk from mother cows and put it into bottles and packets for people to drink.
Many people have milk on their breakfast cereal, and add milk to their tea and coffee.
Silk is a fabric made from the cocoons of the silkworm. The fabric itself has a natural shine to it because of the way light passes through the silk fibres. Silk has been a highly prized fabric for thousands of years.