What are microorganism??

.A microorganism is a living thing that is too small to be seen with the naked eye. .

Organisms which are too small that can not be seen with naked eyes are called microorganisms.

There are 5 major groups of organisms

I) Bacteria

ii) Fungi

iii) protozoa

iv) Virus

v) Algae

They can be seen with the help of microscope

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.