The spaces between the logs are filled with chinking.
A bar graphA graph consisting of bars is called a bar graph. It is irrelevant whether the bars are horizontal or vertical or whether there are spaces between the bars or not.
It is 20 seconds.
-- 21.3 seconds -- 21.6 seconds -- 21.9 seconds ? ? ? ?
19-18 leaves 1 second.
Intercostal spaces
The spaces between leaf veins are called areoles or areolae.
pore spaces
the spaces between the teeth of a comb are called umpernaters :) that's their scientific name.
Rhythm
cementation
The tufted vertical ridges are called wales. The apparent "spaces" between the wales are actually the base fabric called the ground (which can be plain or twill).
If the spaces have been inserted between the letters it is called kerning. If the spaces are put between paragraphs or other elements it is simply called formatting (layout).
Stroma
What is outside the cell
nucleoplasm.
These are called the Interstitial Spaces.