Question

Give reason:-
A matchstick can light a tiny splinter of wood but not a big log of wood.

Answer 1

A matchstick does not catch fire and burn on  its own at room temperature because the ignition temperature of matchstick is higher than the room temperature.A matchstick starts burning on rubbing it on the side of the matchbox because the heat produced by friction heats the chemical at the head of the matchstick to their ignition temperature and makes it catch fire.

Answer 2

Because matchstick is not able to produce ingnition temperature for wood
I am not sure about answer