Question

Please give clear and understandale answers

Answer 1

Answer:

Diatoms are the chief producers in marine environments. Hence they are also called the pearls of the ocean. The diatoms cell walls are composed of silica, thus they leave behind a large amount of deposit. Having silica in them the deposits are gritty in nature and hence called as the diatomaceous earth.

Answer 2

Step-by-step explanation:

Answer:

Corrosion is a natural process that converts a refined metal into a more chemically stable form such as oxide, hydroxide, carbonate or sulfide. It is the gradual destruction of materials by chemical and/or electrochemical reaction with their environment.