Yes, it does !
Live wood sinks....try to break a twig from your garden and drop it in a cup of water!
Live wood is heavier than water because it is water-logged.
Dry, dead wood does not sink by itself..........but it can be water-logged to sink again.
We can water-log wood [or plants] by submerging wood for many weeks.
Or in a few minutes by putting wood under high pressure in water.
See Pine wood samples in the picture above, all kept for 10 minutes under pressurized water. The sample "AT" to the right was in water under the highest pressure (1000 PSI) and now it sinks.....!
A scientific explanation is detailed here.
Of course, we can sink wood by attaching a heavy item, like a rock, to it.
We have found that this rock will have to be 60% to 130% of the weight of the wood.
But if we want to sink a lot of wood (or plants), we will need to carry a lot of rocks too. So it is much easier to sink wood and plants by pressurization waterlogging, and we will describe why......in the next post.
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