Which alcohol will undergo acid-catalyzed dehydration under the mildest conditions?

Which type of fossil does this image depict?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?

Which subshell is represented by the actinides family?