Black Ironwood
Wood in most cases
It depends on the kind of wood. Water is more dense than most wood, but there are some kinds of wood (typically called ironwood) that are more dense than water.
Name the layers of earth in order from most dense to least dense
Mercury has a density of 5.427 g/cm³ Earth has a density of 5.515 g/cm3 So Earth is the most dense planet. [See discussion for more information] NB: Mercury is the most dense planet in our solar system when not accounting for gravitational compression.
No. In fact it is the most dense planet. The least dense is Saturn.
Osmium
pine
Lignum Vitae is an very dense wood imported from Brazil. It can have a density as high as 1.39 g/cc.
The core is the most dense layer
The troposphere is the closest to the Earth and most dense atmospheric layer
This is not a sensible question. There are many types of wood, and many types of metal. It depends which ones you pick. Balsa wood has a very low density, lignum vitae is much higher. Most woods are less dense than water (so they float) but a few are denser. Most metals are more dense than water, but a few, such as sodium and potassium are less dense. Overall, I suppose most metals are denser than most woods, but potassium is less dense than some forms of eucalyptus wood.
inner core