Question

Glass is an example of a
Man-made materiais
O Natural materials​

Answer 1

Answer:

natural made materials

Explanation:

Perhaps the best-known type of natural glass, obsidian is created when molten rock is quickly cooled by suddenly encountering water or air. Many will recognise obsidian by its telltale black sheen, though on rare occasions it can have snowflake-like specks on its surface or even an iridescent, rainbow-like sheen

Answer 2

some are man made whereas few are natural too

Explanation:

Glass is made from natural and abundant raw materials (sand, soda ash and limestone) that are melted at very high temperature to form a new material: glass. At high temperature glass is structurally similar to liquids, however at ambient temperature it behaves like solids.