Question unclear. A metre is smaller than a kilometre. 1kM equals 1000m.
No such thing as a killimeter, but there's 1000(one thousand) millimeters in a meter. And one meter is 0.001 kilometers.
That depends where you are in space. If you are near Earth, maybe Pluto. If you are near Pluto, maybe Mercury.
The cell is the smallest living thing and an atom is the smallest non-living thing.
what is the smallest living thing microbiology will study
Bacteria is the smallest thing that can be seen using a microscope.
the smallest thing
This smallest "thing" is the atom.
the smallest gosselin in earth is a thing or kinetic thing live in Korea and it is called anmoresella
The smallest thing a biologist studies would be cells. Smaller than that you get into biochemistry.
The same thing you can do with a meter
air
cells