Question

The flotation method of plant remain recovery is based on the fact that?

1) carbonized plant remains are light and will float when sediment is dissolved in water
2) carbonized plant remains are light and will fly up with dust during excavation and can be recovered with a sieve
3) carbonized plant remains are heavy and will sink to the bottom and can be collected when sediment is dissolved in water
4) none of the above

Answer 1

The flotation method of recovery relies on carbonized plant remains being less dense than water, allowing them to float to the surface for recovery.

Step-by-step explanation:

The flotation method of plant remain recovery is primarily based on the characteristic that carbonized plant remains are light and will float when sediment is dissolved in water. This is because these plant remains are less dense than the water, similar to how logs stay afloat when transported down a river by logging companies. The fundamental principle is that materials less dense than water will float, which is also observed in natural processes such as the dispersal of seeds by water. For instance, coconuts are well known for their ability to float and reach land where they can germinate due to their light and buoyant nature.

In summary, the correct answer to the student's question is: 1) carbonized plant remains are light and will float when sediment is dissolved in water.