The phrase "a relatively small density" is correct and usable in written English.
It can be used when discussing measurements or comparisons of density in various contexts, such as science, engineering, or statistics.
Example: "The material has a relatively small density compared to other substances, making it ideal for lightweight applications."
Alternatives: "a comparatively low density" or "a modest density".
Many studies have shown that the relationship is non-linear, with a substantial reduction of erosion being caused by relatively small density of cover.
As mites have some of the smallest genomes in the animal kingdom [ 23], T. cinnabarinus has a relatively small microsatellite density, which is correlated with its compact size [ 1, 22].
In those conditions, detecting selection signatures in a genome is somewhat easier even with a relatively small marker density [ 37], but on the other hand, the existence of large haplotype blocks makes it more difficult to pinpoint the exact gene(s) under selection.
Haematogenous-metastatic CC presented significantly more often a relatively low density of small vessels in the intratumoral region.
On heat treatment, the initially amorphous material transforms to a micro-porous material containing small graphitic packets enclosing elongated pores, with a relatively small change in density but an appreciable change in planar carbon sp2-content as well as the development of significant curvature in the graphitic layers.
That is, populations with a relatively small decline in density (or even an increase) harbored higher frequencies of resistant mutants.
Estimates of the star density measured across the arms of spiral galaxies and into the interarm regions show that the large-scale spiral structure of a galaxy of this type is, at least in many cases, represented by only a relatively small fluctuation in star density.
Neighborhoods containing a relatively small proportion of urban residents at low density usurp most of the developed area in a city.
The NT covers a large geographical area (1.35 million square kilometres), but has a relatively small population (230,000), with a population density of 0.2 people/km[ 14].
In contrast, hemolysis and repeated freeze-thawing cycles have been reported to have only a relatively small effect on the obtained optical density (OD) values of an ELISA applied on domestic pig sera [ 38].
